Air bag component with high safety performance

Abstract

The invention discloses an air bag component with high safety performance, which comprises an air bag frame, an air bag cover plate is arranged on the air bag frame, the air bag cover plate is connected with the air bag frame through a hinge structure, and the hinge structure comprises an air bag frame connecting part connected with the air bag frame and a cover plate connecting part connected with the air bag cover plate. A gradual change part is integrally arranged between the airbag frame connecting part and the cover plate connecting part, and the bottom of the gradual change part is arranged along the longitudinal section direction in an unequal thickness manner, so that the strength of the preferentially stressed position can be enhanced, and meanwhile, the opening time of the airbag cover plate at the B end position is delayed; therefore, the air bag cover plate located at the A end and the air bag cover plate located at the B end are opened at the same time, and then the overturning posture of the air bag cover plates is balanced. Furthermore, the opening posture of the air bag cover plate is changed by adjusting the thickness and the width of the bridging point of the air bag cover plate, so that the air bag cover plate can be unfolded according to the expected posture, and the safety problem caused by the fact that the cover plate is broken and flies out is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automobile interior decoration parts, and in particular to an airbag component with higher safety performance. Background Art

[0002] Vehicle airbag components are commonly used as interior trims for cars. They are a type of vehicle accessory used to protect the safety of drivers and passengers. They are generally installed on the back of the car dashboard cover and fixed to an independent airbag reinforcement frame or an integral injection-molded airbag frame. The surface, foam layer, plastic cover, and airbag mesh above the airbag position will be locally weakened accordingly. When the vehicle is accidentally collided, the airbag will expand rapidly, break through the weakened area, open the airbag door, and pop out to protect the driver and passengers.

[0003] The Chinese invention patent with publication number CN206124972U and titled "Airbag cover and airbag cover installation assembly" provides an airbag cover and airbag cover installation assembly, wherein the airbag cover includes a fixed portion and an opening portion connected to the fixed portion and can be pushed open by the airbag when the airbag expands, wherein a flexible connector is connected between the opening portion and the fixed portion to enable the opening portion to remain connected to the fixed portion when the airbag pushes the opening portion open. The airbag cover and airbag cover installation assembly provided by the present invention can prevent the airbag cover and the covering thereon from flying out and causing injury when the airbag expands and pops out.

[0004] In the prior art, due to the shape reasons, the airbag cover and the airbag module are not parallel, and there is a height difference. When the airbag explodes, it first contacts the right side, and the right side will be forced to open first, and then the left side will be forced to open. When the airbag explodes, there is uneven force on the airbag cover, the opening posture of the airbag cover is unbalanced, and the problem of unilateral force concentration causes the hinge to tear from one side, the explosion fails, and finally the airbag cover flies out, and the airbag cover may even smash the upper body, causing fragments to fly out. The safety requirements for the use of the airbag cannot be met, and there are major safety hazards. Summary of the invention

[0005] The present invention aims at the deficiencies in the prior art and provides an airbag component with higher safety performance. The airbag can be released according to a predetermined route and has high safety.

[0006] In order to solve the above technical problems, the present invention is solved through the following technical solutions: an airbag component with higher safety performance, including an airbag frame, on which an airbag cover is arranged, and the airbag cover is connected to the airbag frame through a hinge structure, and the hinge structure includes a bag frame connecting part connected to the airbag frame and a cover connecting part connected to the airbag cover, and a gradient part is integrally arranged between the bag frame connecting part and the cover connecting part, and the bottom of the gradient part is arranged with uneven thickness along the longitudinal section direction.

[0007] In the above technical solution, the uneven thickness of the bottom of the gradient portion is set to increase from the gradient portion A end to the gradient portion B end.

[0008] In the above technical solution, the cross-sectional thickness at the end of the gradient portion A and the end of the gradient portion B is related by: D b ≥[(S1-S2) / L+1]*D a Among them, D b is the cross-sectional thickness of the transition portion at end B, S1 is the distance from the top of the airbag body to end A, S2 is the distance from the top of the airbag body to end B, L is the longitudinal length of the transition portion, D a is the cross-sectional thickness at end A of the gradient section.

[0009] In the above technical solution, the cross-sectional thickness D of the end of the gradient portion A is a The value range is 1 to 3 mm.

[0010] In the above technical solution, the thickness of the unequal thickness cross section at the bottom of the gradient portion increases gradually and evenly from the A end of the gradient portion to the B end of the gradient portion.

[0011] In the above technical solution, the thickness of the unequal thickness section at the bottom of the gradient portion increases gradually from the A end of the gradient portion to the B end of the gradient portion and is located at three quarters of the longitudinal length L of the gradient portion.

[0012] In the above technical solution, except for the side where the airbag cover is connected to the hinge structure, there is a gap between the airbag cover and the airbag frame, and a bridge is provided at the gap.

[0013] In the above technical solution, the bridge is provided with bridging points which make the cross section of the bridge have unequal thickness.

[0014] In the above technical solution, the relationship between the thickness T and the width W of the bridge point setting is: 0.5≤T<W.

[0015] In the above technical solution, the bridging point is located at any position of the bridge.

[0016] Compared with the prior art, the present invention has the following beneficial effects: by setting the bottom of the gradient portion to have unequal thickness along the longitudinal section direction, the strength of the position where the force is preferentially applied can be enhanced, and at the same time, the time for the airbag cover to open at the B end can be delayed, so that the airbag cover at the A end and the airbag cover at the B end can be opened at the same time, thereby balancing the flipping posture of the airbag cover; further, by adjusting the thickness and width of the bridge point of the airbag cover, the opening posture of the airbag cover can be changed, so that the airbag cover can be unfolded in the posture we want, thereby avoiding the safety problems caused by the cover breaking and flying out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the axial cross-section structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the longitudinal cross-sectional structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the longitudinal cross-sectional structure in another embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the present invention in the direction close to the airbag side.

[0022] Figure 5 for Figure 4 A partial enlarged view of part E in the middle.

[0023] Figure 6 for Figure 4 Schematic diagram of the CC cross-section structure.

[0024] Figure 7 for Figure 6 A partial enlarged view of part F in the middle. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings.

[0026] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0027] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0028] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0029] See also Figures 1 to 7 , an airbag component with high safety performance includes an airbag frame 1, an airbag cover 2 is arranged on the airbag frame 1, the airbag cover 2 is centered on the top plane of the airbag frame 1, one side of the airbag cover 2 is connected to the airbag frame 1 through a hinge structure 3, the hinge structure 3 includes a bag frame connecting part 31 connected to the airbag frame 1, a cover connecting part 32 connected to the airbag cover 2, and a gradient part 33 integrally arranged between the bag frame connecting part 31 and the cover connecting part 32, the cross section formed by the three parts can be U-shaped, V-shaped and S-shaped, wherein the bottom thickness of the gradient part 33 is set with different thicknesses along the longitudinal section direction, the longitudinal section direction is the length direction of the hinge, so that the strength at the position where the force is preferentially applied is enhanced, and at the same time the opening time of the airbag cover at the B end is delayed, so that the airbag cover at the A end and the airbag cover at the B end are opened at the same time, thereby balancing the flipping posture of the airbag cover.

[0030] The uneven thickness of the bottom of the gradual change portion 33 is set to increase from the gradual change portion A end to the gradual change portion B end, that is, it gradually increases in thickness from the end away from the upper working surface of the airbag 5 to the end close to the upper working surface of the airbag 5 .

[0031] The cross-sectional thickness at the gradient section A end and the gradient section B end is related by: D b ≥[S1-S2 / L+1]*D a Among them, D b is the cross-sectional thickness of the transition portion at end B, S1 is the distance from the top of the airbag body to end A, S2 is the distance from the top of the airbag body to end B, L is the longitudinal length of the transition portion, D a is the cross-sectional thickness at end A of the gradient section.

[0032] The cross-sectional thickness D at the end of the gradient section A a The value range is 1 to 3 mm.

[0033] The value range is selected according to the vehicle model and the layout structure of the instrument panel. The cross-sectional thickness D at the end of the gradient part A is a Usually it cannot exceed 3mm, otherwise the hinge structure 3 may not be able to unfold normally. Of course, the cross-sectional thickness D at the end of the gradient portion A is a The thinnest value is 1mm to ensure a certain connection strength.

[0034] like Figure 2As shown, one of the thickness increasing methods of the unequal thickness section at the bottom of the gradient part 33 is to increase the thickness uniformly and gradually from the gradient part A end to the gradient part B end, that is, there is a thickening change at the transition from the gradient part A end to the gradient part B end, ensuring that there is no obvious growth part from the gradient part A end to the gradient part B end. This smooth thickening method makes the stress distribution of various parts of the hinge more balanced, avoiding fatigue fracture caused by local stress concentration. This design not only improves the overall structural stability of the hinge, but also optimizes the manufacturing process and reduces injection defects caused by sudden thickness changes, such as shrinkage.

[0035] like Figure 3 As shown, the thickness of the unequal thickness section at the bottom of the gradient portion 33 increases gradually from the gradient portion A end to the gradient portion B end and is located at three quarters of the longitudinal length L of the gradient portion, which is beneficial to strengthening the key stress-bearing area, can reduce the hinge mass, and can ensure the hinge strength.

[0036] In order to ensure the stability of the opening posture of the airbag cover, we also change the opening posture of the airbag cover by adjusting the thickness T and width W of the cover bridge point.

[0037] Specific implementation method: except for the side where the airbag cover 2 is connected to the hinge structure 3, there is a gap between the airbag frame 1, and a bridge 4 is provided at the gap.

[0038] The bridge 4 is provided with a bridging point 41 which makes the cross section of the bridge 4 a cross section of unequal thickness. The cross section at the bridging point 41 can be as follows: Figure 7 The triangle shown may also be a U-shaped structure.

[0039] The relationship between the thickness T and the width W of the bridge point 41 is: 0.5≤T<W.

[0040] The bridging point 41 is located at any position of the bridge 4 , and preferably the bridging point 41 is arranged on the working surface of the bridge 4 close to the airbag side.

[0041] By setting the bottom of the gradient portion to have unequal thickness along the longitudinal section direction, the problems of uneven force on the airbag cover plate, unbalanced opening posture of the airbag cover plate, and unilateral force concentration caused by the height difference between the airbag cover plate and the airbag module are compensated. At the same time, a bridge 4 is set in the gap between the airbag cover plate 2 and the airbag frame 1 to effectively ensure that the opening posture of the airbag cover plate is unfolded as expected, thereby avoiding the safety problems caused by the cover plate breaking and flying out, meeting the safety requirements for the use of airbags, and reducing safety hazards.

[0042] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. An airbag component with high safety performance, comprising an airbag frame (1), characterized in that: An airbag cover plate (2) is arranged on the airbag frame (1), and the airbag cover plate (2) is connected to the airbag frame (1) via a hinge structure (3). The hinge structure (3) comprises a bag frame connection portion (31) connected to the airbag frame (1) and a cover plate connection portion (32) connected to the airbag cover plate (2). A gradient portion (33) is integrally arranged between the bag frame connection portion (31) and the cover plate connection portion (32), and the bottom of the gradient portion (33) is arranged with uneven thickness along the longitudinal section direction.

2. The airbag component with high safety performance according to claim 1, characterized in that: The uneven thickness of the bottom of the gradient portion (33) is set to increase gradually from the gradient portion A end to the gradient portion B end.

3. The airbag component with high safety performance according to claim 2, characterized in that: The cross-sectional thickness of the gradient portion A end and the gradient portion B end is related by: b ≥[(S1-S2) / L+1]*D a ; Among them, D b is the cross-sectional thickness of the transition portion at end B, S1 is the distance from the top of the airbag body to end A, S2 is the distance from the top of the airbag body to end B, L is the longitudinal length of the transition portion, D a is the cross-sectional thickness at end A of the gradient section.

4. The airbag component with high safety performance according to claim 3, characterized in that: The cross-sectional thickness D at the end of the gradient portion A a The value range is 1 to 3 mm.

5. The airbag component with high safety performance according to claim 3, characterized in that: The thickness of the unequal thickness cross section at the bottom of the gradient portion (33) increases gradually and evenly from the gradient portion A end to the gradient portion B end.

6. The airbag component with high safety performance according to claim 3, characterized in that: The thickness of the unequal thickness cross section at the bottom of the gradient portion (33) increases in a manner that it increases from the gradient portion A end to the gradient portion B end and is located at three quarters of the longitudinal length L of the gradient portion.

7. The airbag component with high safety performance according to claim 1, characterized in that: Except for one side where the airbag cover plate (2) is connected to the hinge structure (3), there is a gap between the airbag cover plate (2) and the airbag frame (1), and a bridge (4) is provided at the gap.

8. The airbag component with high safety performance according to claim 7, characterized in that: The bridge (4) is provided with a bridging point (41) which makes the cross section of the bridge (4) have unequal thickness.

9. The airbag component with high safety performance according to claim 8, characterized in that: The relationship between the thickness T and the width W of the bridge point (41) is: 0.5≤T<W.

10. The airbag component with high safety performance according to claim 7, characterized in that: The bridging point (41) is located at any position of the bridge (4).

Images