Gas backflow prevention device and seat cushion airbag

Abstract

The utility model discloses a kind of gas backflow prevention devices, including first reinforcing sheet and second reinforcing sheet, the center of first reinforcing sheet is equipped with first stud mounting hole, second reinforcing sheet is equipped with second stud mounting hole and first gas generator mounting hole, after the alignment of first stud mounting hole of first reinforcing sheet and second stud mounting hole of second reinforcing sheet, first reinforcing sheet and second reinforcing sheet are sewn together;Second reinforcing sheet further includes mounting sheet and folding sheet, second stud mounting hole and first gas generator mounting hole are arranged on mounting sheet, after opposite two sides of folding sheet and mounting sheet are folded, are sewn together, and the folding sheet after folding is covered above first gas generator mounting hole.The utility model further discloses a cushion air bag.In the utility model, gas backflow prevention device only needs to set first reinforcing sheet and second reinforcing sheet two reinforcing sheets, can form gas backflow prevention device, structure is more compact, and sewing process is reduced, and cost is lower.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive airbags, and more particularly to a gas backflow prevention device and a seat cushion airbag. Background Technology

[0002] like Figure 1 As shown, a seat cushion airbag 20 is installed on the seat frame 10 of an existing car seat. The seat cushion airbag 20 is fixedly connected to the seat frame 10 by a fastener 201. The seat cushion airbag 20 is equipped with a gas backflow prevention device (not shown). When a car collision occurs, the generator receives a signal and detonates, filling the airbag 20 with gas. The airbag lifts the seat cushion and dummy, preventing the dummy from sinking and reducing the dummy's injury level. During the process of filling the airbag with gas, the gas backflow prevention device prevents gas from rapidly flowing out of the airbag.

[0003] Existing gas backflow prevention devices have complex structures and involve numerous sewing processes with the airbags in the seat cushions, resulting in high costs.

[0004] Therefore, it is necessary to design a gas backflow prevention device and seat cushion airbag that is compact in structure, has simplified process, and low cost. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gas backflow prevention device and seat cushion airbag that are compact in structure, have simplified processes, and are low in cost.

[0006] The present invention provides a gas backflow prevention device, comprising a first reinforcing plate and a second reinforcing plate. The first reinforcing plate has a first stud mounting hole at its center, and the second reinforcing plate has a second stud mounting hole and a first gas generator mounting hole. After the first stud mounting hole of the first reinforcing plate is aligned with the second stud mounting hole of the second reinforcing plate, the first reinforcing plate and the second reinforcing plate are sewn together.

[0007] The second reinforcing piece also includes a mounting piece and a folding piece. The second stud mounting hole and the first gas generator mounting hole are disposed on the mounting piece. The folding piece and the mounting piece are folded in half and sewn together on opposite sides. The folded piece covers the top of the first gas generator mounting hole.

[0008] Furthermore, the first reinforcing piece is circular.

[0009] Furthermore, the mounting piece includes a stud mounting portion and a gas generator mounting portion, the second stud mounting hole is formed on the stud mounting portion, the first gas generator mounting hole is formed on the gas generator mounting portion, the folding piece is directly connected to the gas generator mounting portion, and after the folding piece is folded along the boundary line between the folding piece and the gas generator mounting portion, it is sewn to the opposite two sides of the gas generator mounting portion.

[0010] Furthermore, at the boundary between the stud mounting portion and the gas generator mounting portion, the length of the adjacent side of the stud mounting portion exceeds the length of the adjacent side of the gas generator mounting portion.

[0011] This utility model also provides a seat cushion airbag, including an air bag and a gas backflow prevention device as described in any of the above claims, wherein the gas backflow prevention device is installed on the air bag.

[0012] Furthermore, the air bag is provided with a third stud mounting hole and a second gas generator mounting hole. The third stud mounting hole is aligned with the first stud mounting hole and the second stud mounting hole. After the second gas generator mounting hole is aligned with the first gas generator mounting hole, the first reinforcing piece and the second reinforcing piece are sewn onto the air bag.

[0013] Furthermore, the edge of the first reinforcing piece is sewn to the second reinforcing piece and the air bag.

[0014] Furthermore, the edge of the first gas generator mounting hole is sewn to the edge of the second gas generator mounting hole.

[0015] Furthermore, the air bag is made from a single main piece. After the first reinforcing piece and the second reinforcing piece are sewn to one side of the main piece, the main piece is folded in half and sewn along its own edge to form the closed air bag.

[0016] Furthermore, the first reinforcing sheet is made of coated fabric, and the second reinforcing sheet is made of uncoated fabric.

[0017] The above technical solution has the following beneficial effects:

[0018] The gas backflow prevention device of this utility model only requires two reinforcing plates, the first reinforcing plate and the second reinforcing plate, to form a gas backflow prevention device. The structure is more compact, the sewing process is reduced, and the cost is lower. Attached Figure Description

[0019] The disclosure of this utility model will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram showing the installation of the seat cushion airbag and seat frame on an existing seat.

[0021] Figure 2 This is an exploded view of the seat cushion airbag in one embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the first sewing step of the seat cushion airbag in one embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the second sewing step of the seat cushion airbag in one embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram showing the completed sewing of the seat cushion airbag in one embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of a gas generator installed on a seat cushion airbag in one embodiment of the present invention.

[0026] Reference table for attached figures:

[0027] First reinforcing plate 1: First stud mounting hole 11;

[0028] Second reinforcing plate 2: Second stud mounting hole 21, first gas generator mounting hole 22, mounting plate 23, folding plate 24, stud mounting part 231, gas generator mounting part 232;

[0029] Air bag 3: Third stud mounting hole 31, second gas generator mounting hole 32;

[0030] Seat frame 10, seat cushion airbag 20, fastener 201, gas generator 30. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0032] It is readily understood that, based on the technical solution of this utility model, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0033] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0034] In some embodiments of this utility model, such as Figure 2 As shown, the gas backflow prevention device includes a first reinforcing plate 1 and a second reinforcing plate 2. The center of the first reinforcing plate 1 is provided with a first stud mounting hole 11, and the second reinforcing plate 2 is provided with a second stud mounting hole 21 and a first gas generator mounting hole 22. After the first stud mounting hole 11 of the first reinforcing plate 1 is aligned with the second stud mounting hole 21 of the second reinforcing plate 2, the first reinforcing plate 1 and the second reinforcing plate 2 are sewn together.

[0035] The second reinforcing piece 2 also includes a mounting piece 23 and a folding piece 24. The second stud mounting hole 21 and the first gas generator mounting hole 22 are provided on the mounting piece 23. The folding piece 24 is folded in half and sewn together on opposite sides. The folded piece 24 covers the top of the first gas generator mounting hole 22.

[0036] Specifically, such as Figure 2 As shown, the first reinforcing piece 1 is a circular piece of fabric, and a first stud mounting hole 11 is provided in the center of the first reinforcing piece 1 for the stud of the gas generator to pass through.

[0037] The second reinforcing plate 2 has a second stud mounting hole 21 and a first gas generator mounting hole 22. When the first reinforcing plate 1 and the second reinforcing plate 2 are sewn together, the first stud mounting hole 11 and the second stud mounting hole 21 coincide, both for the passage of the gas generator stud. The first gas generator mounting hole 22 on the second reinforcing plate 2 is for mounting the gas generator's inlet nozzle. The gas bag 3 has a second gas generator mounting hole 32. When the second reinforcing plate 2 and the gas bag 3 are sewn together, the first gas generator mounting hole 22 and the second gas generator mounting hole 32 coincide, both for mounting the gas generator's inlet nozzle.

[0038] like Figure 2 As shown, the second reinforcing plate 2 also includes a mounting plate 23 and a folding plate 24. The second stud mounting hole 21 and the first gas generator mounting hole 22 are provided on the mounting plate 23.

[0039] like Figure 3As shown, the mounting piece 23 is used to sew with the first reinforcing piece 1 and the air bag 3. When sewing, the first reinforcing piece 1 and the second reinforcing piece 2 are first overlapped, and then placed together on the air bag 3. The first reinforcing piece 1 and the second reinforcing piece 2 are sewn onto the air bag 3 along the edge of the first reinforcing piece 1 and the edge of the first gas generator mounting hole 22.

[0040] like Figure 4 As shown, after the mounting piece 23 is sewn to the first reinforcing piece 1 and the air bag 3, the folding piece 24 is folded in the direction of the mounting piece 23, and then the upper and lower sides of the folding piece 24 that overlap with the mounting piece 23 are sewn together, so that the folding piece 24 covers the top of the first gas generator mounting hole 22.

[0041] Since the folded piece 24 covers the first gas generator mounting hole 22, during the inflation process of the air bag 3, the gas inside the air bag 3 will press the folded piece 24 against the first gas generator mounting hole 22 to prevent the gas inside the air bag 3 from leaking out from the first gas generator mounting hole 22, thereby playing a role in preventing backflow.

[0042] In this embodiment, only two reinforcing plates, the first reinforcing plate 1 and the second reinforcing plate 2, are needed to form a gas anti-backflow device, which is more compact in structure, reduces sewing processes, and lowers costs.

[0043] In this embodiment, the first reinforcing piece 1 is circular. Optionally, the first reinforcing piece 1 can also be other shapes, such as rectangle, triangle, hexagon, or irregular shape.

[0044] Furthermore, such as Figure 2 As shown, the mounting piece 23 includes a stud mounting portion 231 and a gas generator mounting portion 232. A second stud mounting hole 21 is formed on the stud mounting portion 231, and a first gas generator mounting hole 22 is formed on the gas generator mounting portion 232. The folding piece 24 is directly connected to the gas generator mounting portion 232. After the folding piece 24 is folded along the boundary line between the folding piece 24 and the gas generator mounting portion 232, it is sewn to the opposite two sides of the gas generator mounting portion 232.

[0045] Specifically, Figure 2 The red dashed line in the middle is the dividing line between the stud mounting part 231, the gas generator mounting part 232, and the folding piece 24. In this embodiment, the stud mounting part 231 is rectangular, and the gas generator mounting part 232 and the folding piece 24 are symmetrical trapezoids. The gas generator mounting part 232 and the folding piece 24 completely overlap after being folded in half.

[0046] It should be noted that the red dotted line between the stud mounting part 231, the gas generator mounting part 232 and the folding piece 24 is only a boundary line in terms of shape. In fact, the stud mounting part 231, the gas generator mounting part 232 and the folding piece 24 are a whole piece, that is, the second reinforcing piece 2 is a whole.

[0047] Alternatively, the stud mounting portion 231, the gas generator mounting portion 232, and the folded plate 24 can also be other shapes, and the shapes of the gas generator mounting portion 232 and the folded plate 24 are not limited to those of other shapes. Figure 2 The symmetrical trapezoid in the figure can be other symmetrical shapes or asymmetrical shapes.

[0048] Furthermore, such as Figure 2 As shown, at the boundary between the stud mounting portion 231 and the gas generator mounting portion 232, the length of the adjacent side of the stud mounting portion 231 exceeds the length of the adjacent side of the gas generator mounting portion 232.

[0049] like Figure 6 As shown, after the gas generator 30 is inserted into the gas bag 3 through the first gas generator mounting hole 22, the gas outlet of the gas generator 30 is located above the stud mounting part 231. When gas is ejected from the gas outlet of the gas generator 30, the stud mounting part 231 is located between the gas outlet and the gas bag 3, and the stud mounting part 231 can protect the gas bag 3 and prevent particulate matter in the gas from damaging the gas bag 3.

[0050] In other embodiments of this utility model, such as Figure 2 As shown, the seat cushion airbag includes an air bag 3 and a gas backflow prevention device as described in any of the above embodiments, which is installed on the air bag 3. Figure 2 The air bag 3 itself is not yet sewn, and is an unfolded whole piece. Figure 3 The first reinforcing piece 1 and the second reinforcing piece 2 are sewn together with one side of the air bag 3. Figure 4 The folded piece 24 overlaps with the gas generator mounting part 232 and is then sewn together.

[0051] like Figure 5 As shown, after the gas anti-backflow device is sewn to the air bag 3, the air bag 3 is folded in half and sewn along its own edge to form a closed air chamber. At this time, the gas anti-backflow device is located inside the air bag 3.

[0052] Furthermore, such as Figure 2 As shown, the air bag 3 is provided with a third stud mounting hole 31 and a second gas generator mounting hole 32. The third stud mounting hole 31 is aligned with the first stud mounting hole 11 and the second stud mounting hole 21. After the second gas generator mounting hole 32 is aligned with the first gas generator mounting hole 22, the first reinforcing piece 1 and the second reinforcing piece 2 are sewn onto the air bag 3.

[0053] Figure 2 When the two layers overlap, the first reinforcing sheet 1 is located above the second reinforcing sheet 2, and the second reinforcing sheet 2 is located above the deployed airbag 3.

[0054] like Figure 3 As shown, the second reinforcing plate 2 and the air bag 3 are sewn together along the edge of the first reinforcing plate 1, and then the second reinforcing plate 2 and the air bag 3 are sewn together along the edge of the first gas generator mounting hole 22. At this time, the edge of the first gas generator mounting hole 22 overlaps with the edge of the second gas generator mounting hole 32 and is sewn together.

[0055] Furthermore, such as Figure 3 As shown, the airbag 3 is made from a single main piece, with the first reinforcing piece 1 and the second reinforcing piece 2 sewn to one side of the main piece. Figure 5 As shown, the main piece is folded in half and sewn along its own edge to form a closed air bag 3.

[0056] Preferably, the first reinforcing sheet 1 is made of adhesive-coated fabric. In this application, the first reinforcing sheet 1 overlaps with the second reinforcing sheet 2 and the air bag 3, and the generator stud needs to pass through the air bag 3, the second reinforcing sheet 2, and the first reinforcing sheet 1 sequentially from the outside to the inside. The second reinforcing sheet 2 and the first reinforcing sheet 1 are used to prevent the generator stud from tearing the air bag 3. The second reinforcing sheet 2 is made of adhesive-coated fabric, which can increase the structural strength of the second reinforcing sheet 2 and provide better protection for the air bag 3.

[0057] Preferably, the second reinforcing piece 2 is made of uncoated fabric. The portion where the second reinforcing piece 2 overlaps with the first reinforcing piece 1 is primarily protected by the first reinforcing piece 1. The stress at the first gas generator mounting hole 22 on the second reinforcing piece 2 is not significant, therefore the uncoated fabric is sufficient to meet the structural strength requirements of the second reinforcing piece 2.

[0058] The gas backflow prevention device of this utility model only requires two reinforcing plates, the first reinforcing plate and the second reinforcing plate, to form a gas backflow prevention device. The structure is more compact, the sewing process is reduced, and the cost is lower.

[0059] The above description is merely the principle and preferred embodiment of this utility model. It should be noted that, for those skilled in the art, several other modifications can be made based on the principle of this utility model, and these modifications should also be considered within the protection scope of this utility model.

Claims

1. A gas backflow prevention device, characterized in that, It includes a first reinforcing sheet and a second reinforcing sheet. The first reinforcing sheet has a first stud mounting hole at its center, and the second reinforcing sheet has a second stud mounting hole and a first gas generator mounting hole. After the first stud mounting hole of the first reinforcing sheet is aligned with the second stud mounting hole of the second reinforcing sheet, the first reinforcing sheet and the second reinforcing sheet are sewn together. The second reinforcing piece also includes a mounting piece and a folding piece. The second stud mounting hole and the first gas generator mounting hole are disposed on the mounting piece. The folding piece and the mounting piece are folded in half and sewn together on opposite sides. The folded piece covers the top of the first gas generator mounting hole.

2. The gas backflow prevention device according to claim 1, characterized in that, The first reinforcing piece is circular.

3. The gas backflow prevention device according to claim 1, characterized in that, The mounting piece includes a stud mounting portion and a gas generator mounting portion. The second stud mounting hole is formed on the stud mounting portion, and the first gas generator mounting hole is formed on the gas generator mounting portion. The folding piece is directly connected to the gas generator mounting portion. After the folding piece is folded along the boundary line between the folding piece and the gas generator mounting portion, it is sewn to the opposite two sides of the gas generator mounting portion.

4. The gas backflow prevention device according to claim 3, characterized in that, At the boundary between the stud mounting portion and the gas generator mounting portion, the length of the adjacent side of the stud mounting portion exceeds the length of the adjacent side of the gas generator mounting portion.

5. A seat cushion airbag, comprising an air bag, characterized in that, It also includes the gas backflow prevention device according to any one of claims 1-4, wherein the gas backflow prevention device is installed on the gas bag.

6. The seat cushion airbag according to claim 5, characterized in that, The air bag is provided with a third stud mounting hole and a second gas generator mounting hole. The third stud mounting hole is aligned with the first stud mounting hole and the second stud mounting hole. After the second gas generator mounting hole is aligned with the first gas generator mounting hole, the first reinforcing piece and the second reinforcing piece are sewn onto the air bag.

7. The seat cushion airbag according to claim 6, characterized in that, The edge of the first reinforcing piece is sewn to the second reinforcing piece and the air bag.

8. The seat cushion airbag according to claim 6, characterized in that, The edge of the first gas generator mounting hole is sewn to the edge of the second gas generator mounting hole.

9. The seat cushion airbag according to claim 5, characterized in that, The airbag is made from a single main piece. After the first reinforcing piece and the second reinforcing piece are sewn to one side of the main piece, the main piece is folded in half and sewn along its own edge to form the closed airbag.

10. The seat cushion airbag according to claim 5, characterized in that, The first reinforcing sheet is made of coated fabric, and the second reinforcing sheet is made of uncoated fabric.

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