Cushion airbag, method for manufacturing and arranging a cushion airbag, and vehicle seat

Abstract

The present disclosure relates to a seat cushion airbag for a vehicle seat, which is capable of being arranged at a seat cushion of a vehicle seat, wherein the seat cushion airbag is formed by a sheet material and is configured to form a front high and rear low airbag inflated structure after being inflated, the sheet material has a center axis extending along a first direction and at least one fold line extending along a second direction perpendicular to the first direction, wherein the sheet material is capable of being folded along the at least one fold line and after being folded has its corresponding edges connected to each other and thereby forms at least a first, a second and a third bulge section, wherein in the un-inflated state of the seat cushion airbag, the first bulge section is inwardly indented at its root portion relative to the outer edge of the second and third bulge sections in the second direction. The present disclosure also relates to a method for manufacturing and arranging a seat cushion airbag and a vehicle seat comprising the same.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more specifically to a seat cushion airbag, a method for manufacturing and arranging the seat cushion airbag, and a vehicle seat. Background Technology

[0002] Vehicles utilize safety features such as airbags and seatbelts to maximize occupant protection during a collision. Currently, "zero-gravity seats" are gaining popularity among automakers to enhance passenger comfort. When a zero-gravity seat is in a reclined position during a frontal collision, the occupant will tend to sag due to inertia, potentially leading to spinal injuries. In this situation, conventional passive safety devices are not effective in reducing spinal injuries. Therefore, to cater to the trend in the zero-gravity seat market, more and more vehicles are incorporating seat cushion airbags.

[0003] However, traditional seat cushion airbag devices also have the following problems: Airbags formed using traditional sewing methods, after a collision, exhibit a shape that bulges in the middle and sags at the sides when inflated. This shape cannot form an effective support structure when deployed in a seated environment, especially when the occupant is lying in a zero-gravity seat. After deployment, this type of airbag cannot effectively support the occupant's buttocks, preventing them from sliding forward. Particularly in situations with a short seat, forward sliding can cause the airbag volume to be compressed against the seat suspension springs, failing to provide ideal support. This results in a reduction in the actual effective thickness of the airbag, posing a risk of the occupant's buttocks penetrating the airbag and causing a sudden increase in lumbar spine force.

[0004] Ideally, a seat airbag should be teardrop-shaped or triangular, characterized by a front-larger, rear-smaller structure (the direction away from the seat back is considered front). After a collision, the airbag's volume remains at the front, providing adequate support for the occupant. Simultaneously, due to this front-larger-rear-smaller structure, the surface of the airbag in contact with the foam (the upper surface near the occupant's side) forms a slope during deployment, preventing the occupant from sliding towards the front of the vehicle. This structure also helps to prevent most of the gas from rushing backwards during airbag compression, thus preventing changes in the airbag structure and loss of its ideal shape. One issue to consider when creating this front-larger-rear-smaller structure is how to ensure that each convex bulge can deploy freely, and that the deployment of one bulge does not significantly adversely affect the connections between the other bulges, especially when using a multi-bulge structure. Summary of the Invention

[0005] The purpose of this disclosure is to provide a seat cushion airbag in which each of the protrusions can be freely deployed, and the deployment of one protrusion does not have a significant adverse effect on the stitching of the other protrusions.

[0006] Therefore, a first aspect of this disclosure relates to a seat cushion airbag for a vehicle seat, the seat cushion airbag being disposed on the seat cushion of a vehicle seat, wherein the seat cushion airbag is formed of a sheet material and is configured to form a front-high, rear-low airbag inflation structure after inflation and deployment, the sheet material having a central axis extending along a first direction and at least one fold line extending along a second direction perpendicular to the first direction, characterized in that the sheet material is foldable along the at least one fold line and, after folding, its corresponding edges are connected to each other to form at least one first convex section, a second convex section, and a third convex section, the first convex section, the second convex section, and the third convex section being capable of forming corresponding first convex, second convex, and third convex ...

[0007] In this disclosure, by designing the first convex section such that, when the seat cushion airbag is not inflated, the first convex section is recessed inward at its root in a second direction relative to the outer edges of the second and third convex sections, it can be ensured that when connecting the outer ring of the sheet material, the first convex section is not fixed together with the connecting structures of the outer edges of the second and third convex sections, such as sewing thread, and is in a free state after connection. In this case, the connecting structures at the outer edges of the second and third convex sections only bear the force generated by the expansion of the corresponding convex sections, while the connecting structures of the first convex section itself, such as sewing thread, only bear the force generated by the expansion of the first convex section and are not negatively affected by the connecting structures of the second and third convex sections, that is, the connecting structures of the first convex section and the connecting structures of the second and third convex sections do not adversely interfere with each other. This prevents the outer ring connecting structures of each convex bulge from simultaneously bearing high-intensity pressure, or from causing stress concentration or mutual restraint at the intersection of the connecting structures of each convex bulge, thus ensuring that the integrity of the airbag and connecting structures is not damaged. If the connecting structure at the root of the first convex bulge segment interferes with the connecting structures of the second and third convex bulge segments, at least the deployment of the first convex bulge segment will be restricted. This may result in the first convex bulge segment not being able to deploy freely or its deployed shape not achieving the desired form, which would adversely affect the protective effect of the seat cushion airbag. The solution proposed in this disclosure can particularly effectively avoid the above-mentioned adverse situations.

[0008] In some embodiments, the seat cushion airbag is integrally formed from a single sheet of material. This allows the seat cushion airbag to be easily formed from a single sheet of material.

[0009] In some embodiments, the seat cushion airbag is formed by connecting multiple segmented sub-sheets. This allows for the flexible formation of the seat cushion airbag using multiple segmented sub-sheets.

[0010] In some embodiments, when the seat cushion airbag is not inflated, the first convex section is constructed to contract or expand from its base to its top. This results in an advantageous unfolded shape for the first convex section.

[0011] In some embodiments, when the seat cushion airbag is not inflated, the top of the first convex section has an outwardly convex arc shape. This provides an advantageous top edge shape for the first convex section.

[0012] In some embodiments, at least two portions of the convex sections to be positioned on the side away from the seat back are pre-connected together by a pre-stitched structure. This facilitates the installation of the seat cushion airbag in the seat cushion in the uninflated state and ensures that the convex sections to be positioned on the side away from the seat back are not flipped to the side facing the seat back during airbag assembly.

[0013] In some embodiments, the pre-stitched structure is configured to detach during the inflation of the seat cushion airbag. This ensures that the pre-stitched structure does not interfere with the normal deployment of the bulge section away from the seat back when the seat cushion airbag is inflated.

[0014] In some embodiments, the protruding sections of the seat cushion airbag are arranged such that the number of protruding sections to be located on the side away from the seat back is greater than the number of protruding sections to be located on the side facing the seat back. This ensures that the seat cushion airbag forms a front-high, rear-low airbag inflation structure after inflation and deployment.

[0015] In some embodiments, the convex sections located on the side furthest from the seat back can be pre-folded to shorten the flat dimension of the seat cushion airbag along the first direction. This advantageously avoids other structures within the seat, such as ventilation ducts, motors, etc.

[0016] In some embodiments, the pre-folding is achieved through folding inward, rolling, U-shaped folding, E-shaped folding, and Z-shaped folding. Thus, a suitable pre-folding method can be adopted as needed.

[0017] In some embodiments, the sheet includes a first edge, a second edge, a third edge, and a fourth edge, wherein the first edge and the second edge together form one side edge of the first convex hull segment, and the third edge and the fourth edge together form another side edge of the first convex hull segment.

[0018] In some embodiments, the first and second edges extend symmetrically about the first fold line, and the third and fourth edges extend symmetrically about the first fold line, with the first, second, third, and fourth edges each extending to the first fold line. The portions of the first, second, third, and fourth edges furthest from the first fold line in a first direction form the root of the first convex hull section and are respectively recessed inward relative to the outer edge of the sheet in a second direction. This allows advantageous first convex hull sections to be formed within a portion of the sheet using this type of first-type sheet.

[0019] In some embodiments, the sheet is configured such that, when the sheet is folded about a corresponding first fold line, and a first convex section is formed by the first and second edges, as well as the third and fourth edges of the sheet, the remaining portion of the sheet, excluding the first convex section, can be folded about a second fold line in a flat state to form a second and a third convex section, wherein the remaining portion is symmetrically constructed about the second fold line. This allows advantageous second and third convex sections to be formed using this type of sheet.

[0020] In some embodiments, the sheet is symmetrically constructed about a third fold line, and the sheet includes a fifth edge and a sixth edge arranged opposite each other on both sides of the third fold line. A first edge and a third edge extend to the fifth edge, and a second edge and a fourth edge extend to the sixth edge. The portions of the first and third edges furthest from the fifth edge in a first direction, and the portions of the second and fourth edges furthest from the sixth edge in the first direction, form the roots of a first convex section and are respectively recessed inward along a second direction relative to the outer edge of the sheet. Thus, advantageous first convex sections can be formed on the lateral portions of the sheet in the first direction using this second type of sheet.

[0021] In some embodiments, the sheet is configured such that when the sheet is folded about a third fold line, and a first convex section is formed by the first and second edges, the third and fourth edges, and the fifth and sixth edges of the sheet, the remaining portion of the sheet, excluding the first convex section, can be laid flat such that a second convex section and a third convex section can be formed on either side of the root of the first convex section, respectively. This allows advantageous second and third convex sections to be formed using this second type of sheet.

[0022] In some embodiments, the first and second edges are respectively configured to be symmetrical about the central axis with respect to the third and fourth edges. This allows for the realization of a first convex hull segment that is symmetrical about the central axis.

[0023] In some implementations, the extension direction of the indentation edge is perpendicular to the first direction. This results in an advantageous indentation structure that effectively ensures that the connection structures of the first convex hull segment and the connection structures of the second and third convex hull segments do not adversely interfere with each other during unfolding.

[0024] A second aspect of this disclosure relates to a method for manufacturing and arranging a seat cushion airbag, characterized in that the method comprises the following steps: - providing a sheet for forming the seat cushion airbag, the sheet having a central axis extending along a first direction and at least one fold line extending along a second direction perpendicular to the first direction, the sheet itself or, when joined together, having at least one recessed region located on both sides of the central axis, recessed inward from the outer edge of the sheet; - folding and joining the sheet to complete a seal, thereby forming the seat cushion airbag, wherein portions of the sheet corresponding to the recessed regions form the at least one first convex section, and the remaining portions of the sheet form a second convex section and a third convex section; - arranging the convex sections such that, upon inflation and deployment, the seat cushion airbag forms an airbag inflation structure that is higher in the front and lower in the back. Thus, a seat cushion airbag according to this disclosure can be obtained by means of this method for manufacturing and arranging the seat cushion airbag.

[0025] In some implementations, the step “providing a sheet for forming a seat cushion airbag” includes providing a one-piece sheet or multiple sub-sheets with a segmented structure.

[0026] In some embodiments, the sheet includes a first edge, a second edge, a third edge, and a fourth edge, wherein the first edge and the second edge together form one side edge of the first convex hull segment, and the third edge and the fourth edge together form another side edge of the first convex hull segment.

[0027] In some embodiments, the first and second edges extend symmetrically about the first fold line, and the third and fourth edges extend symmetrically about the first fold line, with the first, second, third, and fourth edges extending to the first fold line respectively. The portions of the first, second, third, and fourth edges furthest from the first fold line in a first direction form the root of a first convex bulge segment and are respectively recessed inward along a second direction relative to the outer edge of the sheet. The first and second edges form the bottom of a recessed region on one side of the sheet, while the third and fourth edges form the bottom of another recessed region on the other side of the sheet. This provides a first type of sheet having recessed regions within the sheet.

[0028] In some embodiments, the step of "folding and joining the sheet to form the cushion airbag" includes: folding the sheet about a corresponding first fold line and joining the first and second edges of the sheet to each other, and joining the third and fourth edges of the sheet to each other to form a first convex section. This allows advantageous first convex sections to be formed using recessed areas within the sheet by means of this first type of sheet.

[0029] In some embodiments, the step "folding and joining the sheet to form the cushion airbag" further includes: laying the remaining portion of the sheet, excluding the first convex section, flat, wherein the remaining portion is symmetrically constructed about a second fold line; then folding the flattened remaining portion about the second fold line and joining the remaining portion of the sheet at its outer edge to form the second convex section and the third convex section. This allows advantageous second and third convex sections to be formed using this type of sheet.

[0030] In some embodiments, the first convex hull section is flipped toward the second fold line about a pivot axis extending in a second direction through its root, or toward the edge opposite to the second fold line, while the rest of the section is laid flat. This allows for flexibility in flipping the first convex hull section in different directions depending on the specific circumstances.

[0031] In some embodiments, the sheet is symmetrically constructed about a third fold line, including a fifth edge and a sixth edge arranged opposite each other on both sides of the third fold line. A first edge and a third edge extend to the fifth edge, and a second edge and a fourth edge extend to the sixth edge. The portions of the first and third edges furthest from the fifth edge in a first direction, and the portions of the second and fourth edges furthest from the sixth edge in the first direction, form the roots of a first convex section and are respectively recessed inward along a second direction relative to the outer edge of the sheet. The first and second edges form the bottom of a recessed region on one side of the sheet, while the third and fourth edges form the bottom of another recessed region on the other side of the sheet. This provides a second type of sheet with recessed regions at both ends of the sheet along a first direction.

[0032] In some embodiments, the step of "folding and joining the sheet to form the cushion airbag" includes: folding the sheet about a third fold line, and joining the fifth and sixth edges of the sheet together, joining the first and second edges of the sheet together, and joining the third and fourth edges of the sheet together to form a first convex section. This allows advantageous first convex sections to be formed by means of this second type of sheet with recessed areas at both ends of the sheet in a first direction.

[0033] In some embodiments, the step of "folding and joining the sheet to form the cushion airbag" further includes: laying the remaining portion of the sheet, excluding the first convex section, flat such that unjoined second and third convex sections are formed on either side of the root of the first convex section, and then joining the remaining portion of the sheet at its outer edge to form the second and third convex sections. This allows advantageous second and third convex sections to be formed using this second type of sheet.

[0034] In some implementations, the step of “folding and joining the sheet to form the cushion airbag” further includes joining the corresponding recessed edges of the respective recessed areas to each other.

[0035] In some embodiments, after sealing is completed, at least two portions of the convex sections to be positioned on the side away from the seat back are pre-connected together by a pre-seam structure. This facilitates the installation of the seat cushion airbag in the seat cushion in the uninflated state and ensures that the convex sections to be positioned on the side away from the seat back are not flipped to the side facing the seat back during airbag assembly.

[0036] In some implementations, after sealing, the sections of the convex cushions intended to be located away from the seat back are pre-folded to shorten the flat dimension of the seat cushion airbag along its first direction. This advantageously avoids other structures within the seat, such as ventilation ducts, motors, etc.

[0037] In some implementations, after sealing, the raised sections are arranged such that the number of raised sections to be located on the side away from the seat back is greater than the number of raised sections to be located on the side facing the seat back. This ensures that the seat cushion airbag forms a front-high, rear-low airbag inflation structure after inflation.

[0038] In some embodiments, the seat cushion airbag is the seat cushion airbag according to any one of the embodiments of this disclosure.

[0039] A third aspect of this disclosure relates to a vehicle seat, characterized in that the vehicle seat includes a seat cushion airbag and a seat cushion according to any one of the embodiments of this disclosure, wherein the seat cushion airbag is arranged at the seat cushion such that the seat cushion airbag forms a front-high and rear-low airbag inflation structure after inflation and deployment.

[0040] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0041] The present disclosure will be further described below with reference to the illustrative drawings and exemplary embodiments. Wherein:

[0042] Figure 1 A schematic diagram of the structure of the seat cushion airbag according to the first embodiment of the present disclosure in an uninflated or flat state is shown.

[0043] Figures 2 to 4 Perspective views of the seat cushion airbag in deployment according to an embodiment of the present disclosure are shown from different angles.

[0044] Figures 5a to 5e Schematic diagrams of different pre-folded structures are shown.

[0045] Figure 6 A schematic diagram of the structure of the seat cushion airbag according to the second embodiment of the present disclosure in an uninflated or flat state is shown.

[0046] Figure 7 A schematic diagram of the structure of the seat cushion airbag according to the third embodiment of the present disclosure in an uninflated or flat state is shown.

[0047] Figures 8 to 13 A schematic diagram of the process for manufacturing a seat cushion airbag according to the first and second embodiments of the present disclosure from a first type of sheet is shown.

[0048] Figure 14 A flowchart is shown for a method of manufacturing and arranging seat cushion airbags from a first type of sheet.

[0049] Figures 15 to 17 A schematic diagram of a process for manufacturing a seat cushion airbag according to a third embodiment of the present disclosure from a sheet of the first type is shown.

[0050] Figure 18 A schematic diagram of the structure of the second type of sheet is shown.

[0051] Figure 19 A flowchart is shown for a method of manufacturing and arranging seat cushion airbags from a second type of sheet.

[0052] Figure 20 A schematic diagram of a seat equipped with a seat cushion airbag according to the present disclosure is shown, wherein the seat cushion airbag is in the deployed state. Detailed Implementation

[0053] Firstly, by using Figures 1 to 5e The structure of the seat cushion airbag 200 according to different embodiments of the present disclosure is described.

[0054] In a first embodiment of the seat cushion airbag 200 disclosed herein, the seat cushion airbag 200 for a vehicle seat may be made of sheet 100 (see...). Figure 8 The airbag 200 is configured to form a front-high, rear-low airbag inflation structure after inflation and deployment. The sheet 100 has a central axis A extending along a first direction X (see...). Figure 8 The sheet 100 is folded along at least one fold line and extends along a second direction Y perpendicular to the first direction X. The sheet 100 is foldable along the at least one fold line and, after folding, connects with its corresponding edges to form a first convex section 1, a second convex section 2, and a third convex section 3. These sections, after the seat cushion airbag 200 is inflated and deployed, form corresponding first convex 10, second convex 20, and third convex 30. In the uninflated state of the seat cushion airbag 200, particularly in the flat state of the connected seat cushion airbag 200, the first convex section 1 is recessed inward at its root 1a relative to the outer edge 5 of the second convex section 2 and the third convex section 3 in the second direction Y. In the first embodiment, as... Figure 1 The diagram shows a first convex hull segment 1. It is conceivable that in other embodiments, there could be two or more first convex hull segments 1.

[0055] In the first embodiment, the seat cushion airbag 200 is made of a one-piece sheet 100 (see...) Figure 8 It is formed by a single, integrated connection. For example... Figure 1 As shown, the first convex section 1 is constructed in a contracted manner from its base 1a to its top when the seat cushion airbag 200 is not inflated. Of course, in another embodiment (not shown), the first convex section 1 may also be constructed in an expanded manner from its base 1a to its top when the seat cushion airbag 200 is not inflated. In this first embodiment, as... Figure 1 As shown, when the seat cushion airbag 200 is not inflated, the top of the first convex section 1 is straight.

[0056] The shape of the seat cushion airbag 200 in the deployed state in the first embodiment can be compared analogously to [the following text is missing from the original] Figures 2 to 4 .like Figures 2 to 4As shown, in one embodiment, the seat cushion airbag 200 can be inflated in a free state. The inflated airbag 200 has a first protrusion 10, a second protrusion 20, and a third protrusion 30. The second and third protrusions 20 and 30 form the main body of the airbag 200. The connecting surfaces of the second and third protrusions 20 and 30 can contact the seat cushion, while the connecting surfaces of the first and third protrusions 10 and 30 can contact the foam layer of the seat cushion, directly supporting the occupant's buttocks. The first protrusion 10 is an added portion, and the connecting surfaces of the first and second protrusions 10 and 20 point away from the seat back. After adding the first protrusion 10 based on the 2D airbag structure, the cavity formed by the two makes the entire airbag 200 present a teardrop shape with a higher front and lower back on the side, i.e., an ideal shape. At the same time, when the recessed structure according to this disclosure is adopted, the airbag inflation structure does not cause significant mutual interference at the intersection of the connection structure of the three airbags, so as not to affect the free deployment of the first convex 10, nor to have a negative impact on the connection structure of each convex 10.

[0057] In the first embodiment, after the sheet 100 is joined together with its corresponding edges to form the first convex section 1, the second convex section 2, and the third convex section 3, the first convex section 1 and the second convex section 2 can be pre-connected together by a pre-seam structure to ensure that the first convex section 1 is not flipped to the side facing the seat back during airbag assembly. This pre-seam structure is designed to detach during the inflation of the seat cushion airbag 200. Furthermore, if the flat dimensions of each convex section are large, the flat dimensions along the first direction X can be shortened by pre-folding the first convex section 1 and the second convex section 2, thereby avoiding other structures within the seat, such as ventilation ducts, motors, etc. Here, as... Figures 5a to 5e As shown, the pre-fold can be achieved by folding in (e.g.) Figure 5a For the first convex hull section 1 and the second convex hull section 2, the pre-folding method, rolling (like a "Swiss roll"), and U-shaped folding (like...) Figure 5b For the first convex hull segment 1 and Figure 5e (Pre-folding method for the first convex hull segment 1 and the second convex hull segment 2), E-shaped folding (such as...) Figure 5c For the first convex hull segment 1 and Figure 5d This is achieved through a pre-folding method targeting the second convex hull segment 2 and a Z-shaped fold (compared to the E-shaped fold, folded into a Z-shaped shape when viewed from the side). For example... Figures 5a to 5e As shown, the various pre-folding methods can be combined with each other.

[0058] exist Figure 1 In the first embodiment shown, and in Figures 2 to 4In the illustrated embodiment, the first convex hump section 1 and the second convex hump section 2, and correspondingly the first convex hump 10 and the second convex hump 20, are to be disposed on the side away from the seat back. Of course, in order to achieve... Figures 2 to 4 The unfolding effect shown allows any two of the three convex hull segments to be positioned on the side furthest from the seat back. Therefore, it can be done as follows: Figure 6 In the second embodiment of the seat cushion airbag 200 shown, the first convex section 1 and the third convex section 3 are disposed on the side away from the seat back. Alternatively, in an embodiment not shown, the second convex section 2 and the third convex section 3 may also be disposed on the side away from the seat back. Furthermore, as mentioned above, two or more first convex sections 1 may be provided. In this case, the convex sections of the seat cushion airbag 200 may be arranged such that the number of convex sections to be disposed on the side away from the seat back is greater than the number of convex sections to be disposed on the side facing the seat back.

[0059] Figure 6 The second embodiment of the seat cushion airbag 200 shown is similar to Figure 1 The first embodiment of the seat cushion airbag 200 shown is substantially the same as the first embodiment in all respects except for the flipping orientation of the first convex section 1, and therefore reference can be made to the description of the first embodiment of the seat cushion airbag 200.

[0060] exist Figure 7 The diagram shows a schematic structure of a third embodiment of the seat cushion airbag 200. The difference between the third embodiment and the first embodiment is that, in the third embodiment, the top of the seat cushion airbag 200 is an outwardly convex arc shape.

[0061] In various embodiments, the size and position of each convex bump or convex bump segment can be adjusted according to the actual seat environment and working conditions. For the first and second embodiments, by changing the size and position of the first convex bump segment, the slope of the surface on the side in contact with the occupant and the height of the front end of the airbag can be adjusted, thereby achieving the effect of adjusting the protective performance of the seat cushion airbag 200.

[0062] The manufacturing and arrangement process of the seat cushion airbag 200 according to this disclosure will now be described.

[0063] Figures 8 to 13 This is a schematic diagram of the manufacturing process of the seat cushion airbag 200 made from the first type of sheet 100. Figure 14 This is a flowchart of a method for manufacturing a seat cushion airbag 200 from a sheet 100 of the first type and for arranging the seat cushion airbag 200.

[0064] As shown in the figure, in order to manufacture the seat cushion airbag 200 according to the first embodiment and the second embodiment, a first type of sheet 100 is provided in step S1. The sheet 100 has a central axis A extending along a first direction X and at least one fold line extending along a second direction Y perpendicular to the first direction X. The first type of sheet 100 has recessed regions 41 located inside the sheet 100 that are recessed inward from the outer edge of the sheet 100 on both sides of the central axis A. Figure 8 (As shown). The first type of sheet 100 is characterized in that the recessed region 41 of the sheet 100 is located inside the sheet 100. The sheet 100 includes a first edge 101, a second edge 102, a third edge 103, and a fourth edge 104, wherein the first edge 101 and the second edge 102 together form one side edge of the first convex hull segment 1, and the third edge 103 and the fourth edge 104 together form the other side edge of the first convex hull segment 1. The first edge 101 and the second edge 102 extend symmetrically about the first fold line L1, and the third edge 103 and the fourth edge 104 extend symmetrically about the first fold line L1. The first edge 101, the second edge 102, the third edge 103, and the fourth edge 104 extend to the first fold line L1, respectively. The portions of the first edge 101, the second edge 102, the third edge 103, and the fourth edge 104 furthest from the first fold line L1 in the first direction X form the root 1a of the first convex hull segment 1 and are respectively recessed inward relative to the outer edge of the sheet 100 along the second direction Y. The first edge 101 and the second edge 102 form the bottom of a recessed region 41 on one side of the sheet 100, while the third edge 103 and the fourth edge 104 form the bottom of another recessed region 41 on the other side of the sheet 100. The sheet 100 can be as follows: Figure 8 The sheet 100 is shown as a single-piece structure, thus the sheet 100 itself can have the recessed area 41. Of course, it is also conceivable that the sheet 100 has a multi-piece structure, where the dividing line can be, for example, the line corresponding to the first fold line L1. In the case of a multi-piece structure, the sheet 100 can have the recessed area 41 when spliced ​​together. Here, for ease of understanding, the fifth edge 105 and the sixth edge 106 are also indicated, arranged opposite each other on both sides of the first fold line L1.

[0065] In step S2, the first type of sheet 100 is folded and joined to complete the sealing, thereby forming the seat cushion airbag 200, wherein the portion 4 of the sheet 100 corresponding to the recessed area 41 located inside the sheet 100 forms the at least one first convex section 1, and the remaining portion of the sheet 100 forms the second convex section 2 and the third convex section 3.

[0066] Step S2 includes multiple sub-steps S21 to S23, wherein, in sub-step S21, the first type of sheet 100 is folded about the corresponding first fold line L1 and the first edge 101 and the second edge 102 of the sheet 100 are connected to each other, and the third edge 103 and the fourth edge 104 of the sheet 100 are connected to each other, for example by sewing thread ( Figure 9 (As shown by the dashed lines along the edges) are connected to each other to form the first convex hull segment 1 (as shown by...) Figure 9 (As shown). Then in sub-step 22, the corresponding inwardly recessed edges of the respective concave regions 41 are connected to each other, for example, by sewing thread ( Figure 9 (As shown by the dashed lines along the edges) are connected to each other. Then, in sub-step S23, the remaining portion of the first type of sheet 100, excluding the first convex section 1, is laid flat (as shown by the dashed lines along the edges). Figure 10 and Figure 12 As shown), the remaining portion is constructed symmetrically about the second fold line L2, and then the flattened remaining portion is folded over about the second fold line L2 and the remaining portion of the sheet 100 is connected at its outer edge 5, for example by sewing thread ( Figure 11 and Figure 13 Connect the segments along the edge (as shown by the dashed lines) to form the second convex hull segment 2 and the third convex hull segment 3 (as shown by the dashed lines along the edge). Figure 11 and Figure 13 As shown, where, Figure 11 Corresponding to the seat cushion airbag of the first embodiment, and Figure 13 (Corresponding to the seat cushion airbag in the second embodiment).

[0067] In sub-step S23, a step fork occurs. In one of the forked steps, the first convex hull segment 1, in its tiling state with respect to the pivot axis extending along the second direction Y through its root 1a, is flipped toward the second fold line L2 (e.g., ...). Figure 10 As shown, this corresponds to the first embodiment of the seat cushion airbag 200. Alternatively, in another bifurcation step, the first convex section 1, in the flat state of the remaining portion, is flipped about the pivot axis extending in the second direction Y through its root 1a toward the edge opposite to the second fold line L2 (as shown). Figure 12 As shown, this corresponds to the second embodiment of the seat cushion airbag 200.

[0068] Subsequently, in step S3, at least two portions of the convex sections to be positioned on the side away from the seat back can be pre-connected together using a pre-stitched structure. In step S4, the convex sections to be positioned on the side away from the seat back can be pre-folded to shorten the flat dimension of the seat cushion airbag 200 along its first direction X. Steps S3 and S4 are not subject to any numbering restrictions in terms of their temporal order.

[0069] Finally, in step S5, the convex sections are arranged so that after inflation and deployment, the seat cushion airbag 200 forms an airbag inflation structure that is higher in the front and lower in the back.

[0070] Regarding the seat cushion airbag of the third embodiment, the seat cushion airbag of the third embodiment can be as follows: Figure 15 The sheet 100 shown is also of the first type. The sheet 100 used to manufacture the seat cushion airbag of the third embodiment differs from the sheet 100 used to manufacture the seat cushion airbags of the first and second embodiments in that the sheet 100 used to manufacture the seat cushion airbag of the third embodiment is formed by splicing two sub-sheets 100, and the corresponding edge for forming the top of the first convex section 1 has an arc-shaped structure. The method for manufacturing the seat cushion airbag of the third embodiment is substantially the same as the method for manufacturing the seat cushion airbags of the first and second embodiments in terms of folding and joining the sheet 100, and therefore can be referred to the previous description of the method for manufacturing the seat cushion airbags of the first and second embodiments. In short, it can first be as follows... Figure 15 The diagram shows a first type of sheet 100, which is constructed from two sub-sheets 100. Then, as... Figure 16 The sheet 100 is folded about the first fold line L1, and portions of the sheet 100 are joined to form a first convex section 1. Next, the remaining portion of the sheet 100, excluding the first convex section 1, is laid flat, and the remaining portion is folded about the second fold line L2. The edges of the remaining portion of the sheet 100 are joined to form a second convex section 2 and a third convex section 3 (e.g., ...). Figure 17 As shown, this corresponds to the third embodiment of the seat cushion airbag 200.

[0071] Finally, by using Figure 18 and Figure 19 A method for manufacturing and arranging a seat cushion airbag according to another embodiment using a second type of sheet 100 is described. In step S1', a second type of sheet 100 is provided, the sheet 100 having a central axis A extending along a first direction X and at least one fold line extending along a second direction Y perpendicular to the first direction X, the second type of sheet 100 having recessed regions 41 located at both ends in the first direction X, recessed inward from the outer edge of the sheet 100 on both sides of the central axis A (e.g., ...). Figure 18(As shown). The second type of sheet 100 is characterized in that the recessed regions 41 of the sheet 100 are located at both ends of the sheet 100 in the first direction X. The sheet 100 also includes a first edge 101, a second edge 102, a third edge 103, and a fourth edge 104, wherein the first edge 101 and the second edge 102 together form one side edge of the first convex hull segment 1, and the third edge 103 and the fourth edge 104 together form the other side edge of the first convex hull segment 1. The second type of sheet 100 is symmetrically constructed about the third fold line L3, including a fifth edge 105 and a sixth edge 106, which are arranged opposite each other on both sides of the third fold line L3. The first edge 101 and the third edge 103 extend to the fifth edge 105, and the second edge 102 and the fourth edge 104 extend to the sixth edge 106. The portions of the first edge 101 and the third edge 103 furthest from the fifth edge 105 in the first direction X, and the portions of the second edge 102 and the fourth edge 104 furthest from the sixth edge 106 in the first direction X, form the root of the first convex hull segment 1 and are respectively recessed inward relative to the outer edge of the sheet 100 in the second direction. The first edge 101 and the second edge 102 form the bottom of the recessed region 41 on one side of the sheet 100, while the third edge 103 and the fourth edge 104 form the bottom of another recessed region 41 on the other side of the sheet 100.

[0072] Then in step S2', the second type of sheet 100 is folded and joined to complete the sealing, thereby forming the seat cushion airbag 200, wherein the portion 4 of the sheet 100 corresponding to the recessed area 41 located at both ends of the sheet 100 along the first direction X forms the at least one first convex section 1, and the remaining portion of the sheet 100 forms the second convex section 2 and the third convex section 3.

[0073] Step S2' includes multiple sub-steps S21, wherein, in sub-step S21', the second type of sheet 100 is folded about the third fold line L3, and the fifth edge 105 and the sixth edge 106 of the sheet 100 are connected to each other, the first edge 101 and the second edge 102 of the sheet 100 are connected to each other, and the third edge 103 and the fourth edge 104 of the sheet 100 are connected to each other to form a first convex section 1. Next, in sub-step S22', the corresponding inwardly recessed edges of the corresponding recessed areas 41 are connected to each other. Subsequently, in sub-step S23', the remaining portion of the second type of sheet 100, excluding the first convex section 1, is laid flat such that unconnected second convex sections 2 and third convex sections 3 are formed on both sides of the root of the first convex section 1, and then the remaining portion of the sheet 100 is connected at its outer edge 5 to form the second convex section 2 and the third convex section 3.

[0074] The following steps S3', S4' and S5' are basically the same as the corresponding steps S3, S4 and S5 involving the first type of sheet 100, so they will not be repeated here. Please refer to the previous description of the steps involving the first type of sheet 100.

[0075] Figure 20 This illustrates a vehicle seat equipped with a seat cushion airbag 200 according to the present disclosure, from... Figure 20 As can be clearly seen, this seat cushion airbag 200 can form an ideal shape when deployed, and thanks to the specific design of this disclosure, even under pressure, the remaining thickness of the seat cushion airbag 200 at the front is still large and will not shift backward, thus being sufficient to support the occupant and thereby reduce the occupant's lumbar spine force.

[0076] It should be noted that the terminology used herein is for illustrative purposes only and is not intended to limit the disclosure. The singular forms “a” and “the one” as used herein should include the plural forms unless the context explicitly states otherwise. It is understood that the terms “comprising” and “including,” and other similar terms, when used in the application documents, specifically describe the presence of the stated operation, element, and / or component, without excluding the presence or addition of one or more other operations, elements, components, and / or combinations thereof. The term “and / or” as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, similar reference numerals always denote similar elements.

[0077] The thickness of the elements in the accompanying drawings may be exaggerated for clarity. It is also understood that if an element is described as being on, coupled to, or connected to another element, then the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intermediate elements between them. Conversely, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, it indicates that there is no intermediate element. Other terms used to describe relationships between elements should be interpreted similarly, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," etc.

[0078] Terms such as “top,” “bottom,” “above,” “below,” “over,” “under,” etc., are used to describe the relationship of one element, layer, or region relative to another element, layer, or region, as shown in the accompanying drawings. It is understood that these terms should also encompass other orientations of the device in addition to those described in the accompanying drawings.

[0079] It is understood that although the terms "first," "second," etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of this disclosure.

[0080] It can also be considered that all the exemplary embodiments disclosed herein can be arbitrarily combined with each other. Furthermore, all individual technical features in this application can be arbitrarily combined with each other, as long as the combined technical features are not contradictory. All technically feasible combinations of features are the technical content described in this application.

[0081] Finally, it should be noted that the above embodiments are merely for understanding this disclosure and do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art can make modifications based on the above embodiments, and these modifications will not depart from the scope of protection of this disclosure.

Claims

1. A seat cushion airbag for a vehicle seat, the seat cushion airbag being disposed in the seat cushion of the vehicle seat, wherein, The seat cushion airbag is formed from a sheet (100), and the seat cushion airbag is configured to form a front-high, rear-low airbag inflation structure after inflation and deployment. The sheet has a central axis (A) extending along a first direction (X) and at least one fold line extending along a second direction (Y) perpendicular to the first direction. The sheet material can be folded along the at least one fold line and, after folding, its corresponding edges are connected to each other to form at least one first convex section (1), a second convex section (2), and a third convex section (3). The first convex section, the second convex section, and the third convex section can form corresponding first convex, second convex, and third convex sections after the seat cushion airbag is inflated and deployed. In the uninflated state of the seat cushion airbag, the first convex section is recessed inward at its root (1a) in a second direction relative to the outer edge (5) of the second convex section and the third convex section.

2. The seat cushion airbag according to claim 1, characterized in that, The seat cushion airbag is made of a single piece of sheet material connected in one piece.

3. The seat cushion airbag according to claim 1, characterized in that, The seat cushion airbag is formed by connecting multiple segmented sub-sheets.

4. The seat cushion airbag according to claim 1, characterized in that, When the seat cushion airbag is not inflated, the first convex section is constructed to contract or expand from its root to its top.

5. The seat cushion airbag according to claim 1, characterized in that, When the seat cushion airbag is not inflated, the top of the first convex section is an outwardly convex arc shape.

6. The seat cushion airbag according to any one of claims 1 to 5, characterized in that, At least two portions of the convex sections located on the side away from the seat back are pre-connected together by a pre-stitched structure.

7. The seat cushion airbag according to claim 6, characterized in that, The pre-stitched structure is designed to detach during the inflation of the seat cushion airbag.

8. The seat cushion airbag according to any one of claims 1 to 5, characterized in that, The convex sections of the seat cushion airbag are arranged such that the number of convex sections to be located on the side away from the seat back is greater than the number of convex sections to be located on the side facing the seat back.

9. The seat cushion airbag according to any one of claims 1 to 5, characterized in that, The convex sections that are located on the side away from the seat back can be pre-folded to shorten the flat size of the seat cushion airbag along the first direction.

10. The seat cushion airbag according to claim 9, characterized in that, The pre-folding is achieved through folding in, rolling, U-shaped folding, E-shaped folding, and Z-shaped folding.

11. The seat cushion airbag according to any one of claims 1 to 5, characterized in that, The sheet includes a first edge (101), a second edge (102), a third edge (103), and a fourth edge (104), wherein the first edge and the second edge together form one side edge of the first convex hull section, and the third edge and the fourth edge together form another side edge of the first convex hull section.

12. The seat cushion airbag according to claim 11, characterized in that, The first edge and the second edge extend symmetrically about the first fold line (L1), and the third edge and the fourth edge extend symmetrically about the first fold line. The first edge, the second edge, the third edge and the fourth edge extend to the first fold line respectively. The portion of the first edge, the second edge, the third edge and the fourth edge that is furthest from the first fold line in the first direction forms the root of the first convex section and is recessed inward relative to the outer edge of the sheet in the second direction respectively.

13. The seat cushion airbag according to claim 12, characterized in that, The sheet is configured such that when the sheet is folded about a corresponding first fold line and a first convex section is formed by the first edge, second edge, third edge, and fourth edge of the sheet, the remaining portion of the sheet, excluding the first convex section, can be folded about a second fold line (L2) in a flat state to form a second convex section and a third convex section, wherein the remaining portion is symmetrically constructed about the second fold line.

14. The seat cushion airbag according to claim 11, characterized in that, The sheet is symmetrically constructed about the third fold line (L3), and the sheet includes a fifth edge (105) and a sixth edge (106), which are arranged opposite each other on both sides of the third fold line. The first edge and the third edge extend to the fifth edge, and the second edge and the fourth edge extend to the sixth edge. The portions of the first edge and the third edge that are furthest from the fifth edge in a first direction and the portions of the second edge and the fourth edge that are furthest from the sixth edge in a first direction form the root of a first convex hull segment and are recessed inward relative to the outer edge of the sheet in a second direction.

15. The seat cushion airbag according to claim 14, characterized in that, The sheet is configured such that when the sheet is folded about the third fold line and a first convex section is formed by the first edge, the second edge, the third edge, the fourth edge, the fifth edge, and the sixth edge of the sheet, the remaining portion of the sheet, excluding the first convex section, can be laid flat such that a second convex section and a third convex section can be formed on both sides of the root of the first convex section, respectively.

16. The seat cushion airbag according to claim 11, characterized in that, The first and second edges are respectively set to be symmetrical about the central axis with respect to the third and fourth edges.

17. The seat cushion airbag according to any one of claims 1 to 5, characterized in that, The extension direction of the indented edge is perpendicular to the first direction.

18. A method for manufacturing and arranging seat cushion airbags, characterized in that, The method includes the following steps: - Provide a sheet for forming a seat cushion airbag, the sheet having a central axis extending in a first direction and at least one fold line extending in a second direction perpendicular to the first direction, the sheet itself or when spliced ​​together having at least one recessed area (41) located on both sides of the central axis that is recessed inward from the outer edge of the sheet. - Fold and join the sheet to complete the sealing, thereby forming the cushion airbag, wherein the portion (4) of the sheet corresponding to the recessed area forms the at least one first convex section, and the remaining portion of the sheet forms the second convex section and the third convex section; - The convex sections are arranged so that after inflation, the seat cushion airbag forms an airbag inflation structure that is higher in the front and lower in the back.

19. The method according to claim 18, characterized in that, The step "providing a sheet for forming the seat cushion airbag" includes: providing a one-piece sheet or multiple sub-sheets with a segmented structure.

20. The method according to claim 18, characterized in that, The sheet material includes a first edge, a second edge, a third edge, and a fourth edge, wherein the first edge and the second edge together form one side edge of the first convex hull section, and the third edge and the fourth edge together form another side edge of the first convex hull section.

21. The method according to claim 20, characterized in that, The first edge and the second edge extend symmetrically about the first fold line, and the third edge and the fourth edge extend symmetrically about the first fold line. The first edge, the second edge, the third edge and the fourth edge extend to the first fold line respectively. The portion of the first edge, the second edge, the third edge and the fourth edge that is furthest from the first fold line in the first direction forms the root of the first convex hull segment and is recessed inward relative to the outer edge of the sheet in the second direction respectively. The first edge and the second edge form the bottom of the recessed area on one side of the sheet, while the third edge and the fourth edge form the bottom of another recessed area on the other side of the sheet.

22. The method according to claim 21, characterized in that, The step "folding and connecting the sheet to form the cushion airbag" includes: folding the sheet about the corresponding first fold line and connecting the first and second edges of the sheet to each other, and connecting the third and fourth edges of the sheet to each other to form a first convex section.

23. The method according to claim 22, characterized in that, The step "folding and connecting the sheet to form the cushion airbag" further includes: laying the remaining portion of the sheet, except for the first convex section, flat, wherein the remaining portion is symmetrically constructed about the second fold line, then folding the flattened remaining portion about the second fold line and connecting the remaining portion of the sheet at its outer edge to form the second convex section and the third convex section.

24. The method according to claim 23, characterized in that, The first convex hull section is flipped toward the second fold line about the pivot axis extending in the second direction through its root, or toward the edge opposite to the second fold line, in the paved state of the rest.

25. The method according to claim 20, characterized in that, The sheet is symmetrically constructed about the third fold line. The sheet includes a fifth edge and a sixth edge, which are arranged opposite each other on both sides of the third fold line. The first edge and the third edge extend to the fifth edge, and the second edge and the fourth edge extend to the sixth edge. The portions of the first edge and the third edge furthest from the fifth edge in a first direction, and the portions of the second edge and the fourth edge furthest from the sixth edge in the first direction, form the root of a first convex hull segment and are recessed inward relative to the outer edge of the sheet in a second direction. The first edge and the second edge form the bottom of a recessed area on one side of the sheet, while the third edge and the fourth edge form the bottom of another recessed area on the other side of the sheet.

26. The method according to claim 25, characterized in that, The step "folding and connecting the sheet to form the cushion airbag" includes: folding the sheet about the third fold line and connecting the fifth and sixth edges of the sheet to each other, connecting the first and second edges of the sheet to each other, and connecting the third and fourth edges of the sheet to each other to form a first convex section.

27. The method according to claim 26, characterized in that, The step "folding and joining the sheet to form the cushion airbag" further includes: laying the remaining portion of the sheet, except for the first convex section, flat such that an unjoined second convex section and a third convex section are formed on both sides of the root of the first convex section, and then joining the remaining portion of the sheet at its outer edge to form the second convex section and the third convex section.

28. The method according to claim 22 or 26, characterized in that, The step "folding and joining the sheet to form the cushion airbag" further includes joining the corresponding recessed edges of the respective recessed areas (41) to each other.

29. The method according to claim 18, characterized in that, After the sealing is completed, at least two parts of the convex sections that are to be located on the side away from the seat back are pre-connected together by a pre-seam structure.

30. The method according to claim 18, characterized in that, After sealing is completed, the convex sections that are to be located on the side away from the seat back are pre-folded to shorten the flat dimension of the seat cushion airbag along its first direction.

31. The method according to claim 18, characterized in that, After the sealing is completed, the convex sections are arranged such that the number of convex sections to be placed on the side away from the seat back is greater than the number of convex sections to be placed on the side facing the seat back.

32. The method according to claim 18, characterized in that, The seat cushion airbag is the seat cushion airbag according to any one of claims 1 to 17.

33. A vehicle seat, characterized in that, The vehicle seat includes a seat cushion airbag and a seat cushion according to any one of claims 1 to 17, wherein the seat cushion airbag is arranged at the seat cushion such that the seat cushion airbag forms an airbag inflation structure that is higher in the front and lower in the back after inflation and deployment.

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