A front passenger airbag structure with internal tethers

Abstract

This utility model discloses a front passenger airbag structure with internal pull straps, including an airbag body and internal pull straps disposed within the airbag body. The internal pull straps include a cross-shaped pull strap and a straight pull strap. The upper and lower ends of the cross-shaped pull strap are sewn to the left and right sides of the inner surface of the middle panel of the airbag body, and its left and right ends are sewn to the inner surfaces of the left and right sides of the airbag body. One end of the straight pull strap is sewn to the center of the cross-shaped pull strap, and its other end is sewn to the air inlet of the airbag body. The internal pull straps of this utility model can serve as a platform to meet the performance requirements of different working conditions. The X-axis pull strap can restrict airbag deployment, reducing airbag stiffness to handle frontal working conditions of small dummies and avoid neck overload. The Y-axis pull strap can control the airbag deployment width, suppressing excessive lateral expansion of large-volume airbags and avoiding the risk of screen collapse.

Description

Technical Field

[0001] This utility model relates to the field of automotive airbag technology, and in particular to a front passenger airbag structure with an internal tether. Background Technology

[0002] Automotive airbags are crucial passive safety devices in automobiles, and front passenger airbags have become standard equipment in most vehicles. When deployed, front passenger airbags inflate the airbag bag via a gas inflation device, causing it to deploy and protect the occupants. Internal straps are typically used to control the shape and direction of airbag deployment; however, existing internal straps are insufficient to meet the performance requirements of different operating conditions, such as effectively limiting airbag deployment to prevent neck overload on the dummy, and suppressing excessive lateral expansion to avoid the risk of airbag malfunction. To meet various regulatory requirements and consider the versatility of the strap structure, the applicant, through beneficial exploration and research, has found a solution to the above problems. The technical solution described below arose from this background. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a front passenger airbag structure with internal pull straps to address the shortcomings of the existing technology. The airbag stiffness and thickness can be adjusted by the pull straps to meet different working conditions, thereby reducing the need to adjust the shape of the airbag.

[0004] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0005] A front passenger airbag structure with an internal pull strap includes an airbag body and an internal pull strap disposed within the airbag body. The airbag body is inflated and deployed under the limiting control of the internal pull strap, with its front side contacting the windshield of the car, its rear side contacting the front passenger, and its lower side contacting the dashboard of the car.

[0006] The internal pull straps include a cross-shaped pull strap and a straight pull strap. The upper and lower ends of the cross-shaped pull strap are sewn onto the left and right sides of the inner side of the middle cut piece of the air bag body. The left and right ends are sewn onto the inner sides of the left and right cut pieces of the air bag body. One end of the straight pull strap is sewn onto the center of the cross-shaped pull strap, and the other end is sewn onto the air inlet of the air bag body.

[0007] In a preferred embodiment of this utility model, the air bag body is formed by sewing together the middle cut piece of the air bag and the left and right cut pieces of the air bag.

[0008] In a preferred embodiment of the present invention, the cross-shaped pull strap includes a disc-shaped central fabric piece and upper, lower, left, and right strip fabric pieces connected to the disc-shaped central fabric piece. The upper, lower, left, and right strip fabric pieces are centrally symmetrically distributed along the center of the disc-shaped central fabric piece.

[0009] Due to the adoption of the above technical solutions, the beneficial effects of this utility model are as follows: The internal pull straps of this utility model can serve as a platform to meet the performance requirements of different working conditions. The X-axis pull straps can restrict the airbag deployment, reduce the airbag stiffness to cope with the frontal working conditions of small dummies, and avoid neck overload. The Y-axis pull straps can control the airbag deployment width, suppress the lateral excessive expansion of large-volume airbags, and avoid the risk of screen collapse. The circular base of the cross-shaped pull straps of this utility model disperses the tension transmitted by the four-way fabric pieces through geometric symmetry, avoiding stress concentration that could lead to localized tearing. This invention is applicable to adjusting the stiffness and thickness of the airbag through the pull straps to meet different working conditions, thereby reducing the need for adjustments to the airbag shape. At the same time, this utility model simplifies the pull strap structure, saving fabric pieces and cutting costs. Attached Figure Description

[0010] 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.

[0011] Figure 1 This is a schematic diagram of the internal pull strap structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the front passenger airbag structure after the internal tether straps are sewn together.

[0013] Figure 3 This is a perspective view of the front passenger airbag structure after the internal tether straps have been sewn together.

[0014] Figure 4 This is a simplified schematic diagram showing the internal pull strap sewn to the air bag body of this utility model. Detailed Implementation

[0015] 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.

[0016] See Figures 2 to 4 and combined Figure 1The figure shows a front passenger airbag structure with internal straps, including an airbag body 100 and internal straps 200 disposed within the airbag body 100.

[0017] The airbag body 100 is sewn together from the middle panel 110 and the left and right panels 120 and 130. An air inlet 101 is provided on the airbag body 100. When the gas generator 10 detonates, the high-pressure gas generated by the gas generator 10 enters the airbag body 100 through the air inlet 101. The airbag body 100 is inflated and unfolded under the limiting control of the internal pull strap 200. Its front side contacts the windshield of the car, its rear side contacts the passenger side, and its lower side contacts the dashboard of the car.

[0018] The internal pull strap 200 includes a cross-shaped pull strap 210 and a straight pull strap 220. The cross-shaped pull strap 210 includes a disc-shaped central fabric piece 211 and upper, lower, left, and right strip fabric pieces 212, 213, 214, and 215 connected to the disc-shaped central fabric piece 211. The upper, lower, left, and right strip fabric pieces 212, 213, 214, and 215 are centrally symmetrically distributed along the center of the disc-shaped central fabric piece 211.

[0019] The upper and lower ends 212a and 213a of the cross-shaped pull strap 210 are sewn to the left and right sides of the inner side of the middle cut piece 110 of the air bag body 100, and the left and right ends 214a and 215a are sewn to the inner sides of the left and right cut pieces 120 and 130 of the air bag body 100. One end of the straight pull strap 220 is sewn to the center of the cross-shaped pull strap 210 (the center of the disc-shaped center fabric piece 211), and the other end is sewn to the air inlet 101 of the air bag body 100.

[0020] The internal pull strap 200 of this invention can serve as a platform to meet the performance requirements of different working conditions. When the airbag punctures and deploys, a large amount of high-pressure gas generated by the gas generator enters the airbag body 100 through the air inlet 101. The cross-shaped pull strap 210 restricts the airbag's X-axis expansion through its upper end 212a and lower end 213a, controlling the airbag thickness and reducing its stiffness to cope with the frontal working conditions of the small dummy and avoid neck overload. The cross-shaped pull strap 210 restricts the airbag's Y-axis expansion through its left end 214a and right end 215a, suppressing excessive lateral expansion of the large-volume airbag and avoiding the display screen, effectively preventing the airbag from colliding with the display screen during deployment.

[0021] 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. A front passenger airbag structure with an internal pull strap, comprising an airbag body and an internal pull strap disposed within the airbag body, wherein the airbag body is inflated and deployed under the limiting control of the internal pull strap, with its front side contacting the vehicle windshield, its rear side contacting the front passenger side, and its lower side contacting the vehicle dashboard; characterized in that, The internal pull straps include a cross-shaped pull strap and a straight pull strap. The upper and lower ends of the cross-shaped pull strap are sewn onto the left and right sides of the inner side of the middle cut piece of the air bag body. The left and right ends are sewn onto the inner sides of the left and right cut pieces of the air bag body. One end of the straight pull strap is sewn onto the center of the cross-shaped pull strap, and the other end is sewn onto the air inlet of the air bag body.

2. The front passenger airbag structure with internal tethers as described in claim 1, characterized in that, The air bag body is made by sewing together the middle piece of the air bag and the left and right pieces of the air bag.

3. The front passenger airbag structure with internal tethers as described in claim 1, characterized in that, The cross-shaped pull strap includes a disc-shaped central fabric piece and upper, lower, left, and right strip fabric pieces connected to the disc-shaped central fabric piece. The upper, lower, left, and right strip fabric pieces are centrally symmetrically distributed along the center of the disc-shaped central fabric piece.

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