Safety air bag and vehicle seat
By providing a limiting structure of a drawstring or sewing thread in the inflatable chamber of the airbag, the problem of impact damage to the occupant's crotch caused by the airbag is solved, and the protective effect of the airbag is achieved.
Patent Information
- Application Number
- CN202422766817.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The existing airbag may cause impact damage to the occupant's crotch after inflation.
A restriction structure, including a drawstring or sewing thread, is provided in the inflatable chamber of the airbag to limit or release the height of the restricted area after the airbag is inflated, so as to form a recessed area and avoid impact damage to the occupant's crotch.
Through the design of the limiting structure, the airbag avoids impact damage to the occupant's crotch, reduces the risk of penetration, protects the occupant's lumbar spine and prevents diving.
Smart Images
Figure CN223420667U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of passive safety devices, and more particularly to a safety airbag and a vehicle seat. Background Art
[0002] Currently, "zero-gravity seats" are increasingly being used in vehicles to improve passenger comfort. When a zero-gravity seat is tilted in a vehicle collision, the driver and occupant (hereinafter referred to as the occupant) will move forward due to inertia and tend to dive, potentially causing spinal injuries. To prevent this, the seat is equipped with an airbag. When triggered in a collision, it inflates, lifting the occupant's legs and hips upward, reducing the risk of diving and spinal injuries.
[0003] Although the airbag will lift the occupant's legs and buttocks after inflation, the part of the airbag that supports the occupant's legs and buttocks will also be pressed down. Since the area of the airbag between the occupant's legs is unloaded, it will not be pressed down, which will cause the airbag to be higher in this area than the nearby area, thereby forming a raised area. When the occupant moves forward under the action of inertia after a vehicle collision, this raised area will produce a certain impact force on the occupant's crotch and cause injury. Utility Model Content
[0004] The purpose of the utility model is to provide a safety airbag and a vehicle seat, so as to prevent the safety airbag from causing damage to the crotch of the occupant after being inflated.
[0005] Based on the above-mentioned purpose, the present invention provides an airbag on the one hand, including an airbag and a generator installed in a vehicle seat, the airbag having an inflatable chamber, the inflatable chamber being provided with a restriction structure, the generator being used to be triggered when the vehicle collides to generate gas to fill the inflatable chamber; the restriction structure is configured to form a restricted area on the airbag, and to limit the height of the restricted area after the airbag is inflated, so that the height of the restricted area is lower than other areas of the airbag.
[0006] Furthermore, the restriction structure is also configured to release the height restriction of the restricted area when the airbag is inflated to a preset degree, so that the height of the restricted area gradually increases.
[0007] Furthermore, the limiting structure includes at least two drawstrings, which are arranged at intervals in sequence, and the two ends of the drawstrings are respectively fixed to the top and bottom of the airbag. After the airbag is inflated, the drawstrings pull the top and bottom of the airbag to limit the height of the airbag in the restricted area.
[0008] Further, the pull strap is detachably fixed to the top and / or bottom of the air bag, before the air bag is inflated to a preset degree, the pull strap is fixed to the top and bottom of the air bag to limit the height of the restricted area; when the air bag is inflated to the preset degree, the pull strap is disconnected from the top and / or bottom of the air bag to release the height limitation of the restricted area.
[0009] Further, the pull strap is fixed to the top and bottom of the air bag by sewing thread, and the sewing thread for connecting the pull strap and the top and / or bottom of the air bag is arranged to be broken when the air bag is inflated to a preset degree.
[0010] Further, the pull strap is provided with a folding part, the folding part is pre-sewn by a sacrifice line to maintain a folded state, and the sacrifice line is arranged to keep the folding part in the folded state before the air bag is inflated to a preset degree, and to be broken to unfold the folding part when the air bag is inflated to the preset degree.
[0011] Further, the pull strap is provided with a weakening line, and the pull strap is disconnected along the weakening line when the air bag is inflated to a preset degree.
[0012] Further, the pull strap is provided with at least one air guide hole.
[0013] Further, the limiting structure includes at least two sewing threads, each sewing thread is arranged in sequence and at intervals, and the sewing threads fix the top and bottom of the air bag.
[0014] Further, the sewing threads are arranged to be broken when the air bag is inflated to a preset degree, so that the top and bottom of the air bag are disconnected.
[0015] The utility model discloses a vehicle seat on another aspect, including the safety air bag as described above, the safety air bag sets up in the cushion of the vehicle seat. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the structure schematic diagram after the safety air bag of the utility model embodiment is inflated;
[0017] Figure 2 It is Figure 1 the explosion drawing of the safety air bag;
[0018] Figure 3 It is Figure 1 A-A section view of the safety air bag of the utility model embodiment;
[0019] Figure 4 It is the A-A direction section view of the safety air bag after the air bag of the utility model embodiment is inflated when being formed by folding a piece of cloth;
[0020] Figure 5 A-A direction sectional view of the airbag after inflation when the pull strap has a folding portion according to an embodiment of the present utility model;
[0021] Figure 6 Structure schematic view of the pull strap with a folding portion according to an embodiment of the present utility model;
[0022] Figure 7 Front view of the pull strap with a weakening line according to an embodiment of the present utility model;
[0023] Figure 8A Front view of the first kind of pull strap with a gas guide hole according to an embodiment of the present utility model;
[0024] Figure 8B Front view of the second kind of pull strap with a gas guide hole according to an embodiment of the present utility model;
[0025] Figure 8C Front view of the third kind of pull strap with a gas guide hole according to an embodiment of the present utility model;
[0026] Figure 8D Front view of the fourth kind of pull strap with a gas guide hole according to an embodiment of the present utility model;
[0027] Figure 8E Front view of the fifth kind of pull strap with a gas guide hole according to an embodiment of the present utility model;
[0028] Figure 8F Front view of the sixth kind of pull strap with a gas guide hole according to an embodiment of the present utility model;
[0029] Figure 9 Another structure schematic view of the airbag according to an embodiment of the present utility model;
[0030] Figure 10 Ex Figure 9 plosive view of the airbag;
[0031] Figure 11 A-A direction sectional view of the airbag after inflation when the limiting structure is a sewing thread according to an embodiment of the present utility model;
[0032] Figure 12 Structure schematic view of the airbag in the early inflation stage after the collision according to an embodiment of the present utility model;
[0033] Figure 13 Structure schematic view of the airbag in the late inflation stage after the collision according to an embodiment of the present utility model. DETAILED DESCRIPTION
[0034] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings and described in detail.
[0035] Example 1
[0036] like Figure 1 、 Figure 2 and Figure 3 As shown, an embodiment of the present invention provides an airbag, which includes an airbag 100 and a generator 200. The airbag 100 and the generator 200 are both arranged on a vehicle seat. The airbag 100 has an inflatable chamber 110, and a limiting structure is provided in the inflatable chamber 110. The generator 200 is at least partially located in the inflatable chamber 110 and at least partially extends out of the inflatable chamber 110 and is fixed to the seat. The generator 200 is used to be triggered when the vehicle collides to generate a large amount of gas, which will fill the inflatable chamber 110, thereby inflating the airbag 100 in a very short time; the limiting structure is used to form a restricted area 120 on the airbag 100, and limit the height of the restricted area 120 after the airbag 100 is inflated, so that the height of the restricted area 120 is lower than other areas of the airbag 100. In this way, the restricted area 120 will form a recessed area, thereby avoiding impact damage to the occupant's crotch due to the restricted area 120 being too high.
[0037] When installing the airbag on a seat, the restricted area 120 should be installed between the areas of the seat that support the occupant's legs. This allows the restricted area 120 to be located between the occupant's legs after the occupant sits on the seat. For example, the area between the occupant's legs is typically the middle area of the seat, so the restricted area 120 can also be located in the middle area of the airbag 100. During installation, the middle area of the airbag 100 can be placed in the middle area of the seat, allowing the restricted area 120 to be located between the occupant's legs after the occupant sits on the seat.
[0038] In some embodiments, the restriction structure can also be configured to release the height restriction of the restricted area 120 when the airbag 100 is inflated to a predetermined level, allowing the restricted area 120 to gradually increase in height. This can avoid the risk of penetration caused by the restricted height of the restricted area 120 (i.e., the top and bottom of the airbag 100 are at zero contact), and can also help protect the occupant's lumbar spine and prevent diving. In other words, the restriction structure only restricts the height of the restricted area 120 during the initial inflation period and no longer restricts the height of the restricted area 120 after a period of inflation.
[0039] In some embodiments, the limiting structure includes at least two drawstrings 300, and the drawstrings 300 extend along the Y direction (e.g. Figure 1As shown), and arranged at intervals along the X direction, the two ends of the drawstring 300 in the Z direction are respectively fixed to the top and bottom of the airbag 100. After inflation, the drawstring 300 can pull the top and bottom of the airbag 100, thereby limiting the height of the airbag 100 fixed to the drawstring 300; each drawstring 300 can form a square restricted area 120 on the airbag 100. Since the height of the airbag 100 at the drawstring 300 is limited, the height of the airbag 100 between any two drawstrings 300 will also be limited, that is, the height of the restricted area 120 will be limited. In this way, after inflation, the height of the restricted area 120 will be lower than other areas, forming a depression, so as to avoid impact damage to the crotch of the occupant due to the restricted area 120 being too high.
[0040] Before inflation, the airbag 100 and the drawstring 300 are both in a folded state, and the top and bottom of the airbag 100 are in contact with each other; after inflation, the airbag 100 will gradually expand as the gas fills inside it. As the airbag 100 expands, the top and bottom of the airbag 100 will move away from each other, and the drawstring 300 will also be gradually unfolded until the drawstring 300 is straightened and can no longer be unfolded. At this time, the drawstring 300 will pull the top and bottom of the airbag 100, so that the distance between the top and bottom in the restricted area 120 along the Z direction (i.e., the height) will remain unchanged, and the top and bottom of other areas will continue to move away from each other (i.e., the height continues to increase), thereby making the height of the restricted area 120 smaller than that of other areas, forming a recessed area.
[0041] It can be understood that the height of the restricted area 120 is determined by the height of the drawstring 300, and the height of the restricted area 120 can be adjusted by adjusting the height of the drawstring 300; the size of the restricted area 120 is determined by the spacing between the two drawstrings 300 that are farthest apart and the extension length of the drawstring 300 along the Y direction, and the size of the restricted area 120 can be adjusted by adjusting the above spacing and extension length.
[0042] In some embodiments, the air bag 100 may include a main piece 130 and a side piece 140, and the main piece 130 and the side piece 140 are formed into complementary shapes, for example, both are formed into a U shape, and the main piece 130 and the side piece 140 are fixed to each other (for example, sewn together) to form an air bag 100 with an inflatable chamber 110; the two opposite cantilever portions of the U-shaped main piece 130 can be respectively formed as the top and bottom of the air bag 100.
[0043] like Figure 4 As shown, in some embodiments, the air bag 100 can also be formed by folding a piece of cloth, for example, folding the cloth in half and then fixing the two ends of the cloth together (for example, sewing them together), thereby forming an air bag 100 with an inflatable chamber 110.
[0044] It is understandable that the above two ways of forming the airbag 100 are merely exemplary, and the airbag 100 may also be formed in any other suitable way, which is not limited in the present invention.
[0045] In some embodiments, the drawstring 300 may be configured to be detachably fixed to the top and / or bottom of the airbag 100. As the airbag 100 gradually inflates, the drawstring 300 will gradually unfold until it is stretched tight by the top and bottom of the airbag 100. When the airbag 100 is inflated to a predetermined level, the drawstring 300 will separate from the top and / or bottom of the airbag 100 due to the expansion force of the airbag 100. As a result, the top and bottom of the restricted area 120 are no longer restrained by the drawstring 300, and thus its height is no longer restricted by the drawstring 300. In other words, the height of the restricted area 120 gradually increases. In other words, during the initial inflation phase, the drawstring 300 is fixed to the top and / or bottom of the airbag 100. As inflation continues, the drawstring 300 will disconnect from the top and / or bottom of the airbag 100 and no longer restrict the height of the restricted area 120.
[0046] The drawstring 300 can be fixed to the top and bottom of the airbag 100 by sewing threads, and the sewing threads are configured to break when subjected to a preset force (i.e., when inflated to a preset degree), thereby disconnecting the drawstring 300 from the top and / or bottom of the airbag 100.
[0047] like Figure 5 and Figure 6 As shown, in some embodiments, a folding portion 310 is provided on the drawstring 300, and the folding portion 310 is pre-stitched by a sacrificial line 320 to maintain a folded state. In the early stage of inflation, the sacrificial line 320 will keep the folding portion 310 in a folded state, and the height of the drawstring 300 is the height in the folded state. Therefore, the height of the restricted area 120 will be limited by the drawstring 300 and will be lower than the height of other areas; when inflated to a preset degree, the sacrificial line 320 will break, the folded portion 310 will unfold, and the height of the drawstring 300 will increase. Therefore, the height limit of the restricted area 120 will be released, and its height will gradually increase.
[0048] like Figure 7 As shown, in some embodiments, a weakening line 330 may be provided on the drawstring 300. In the early stage of inflation, the drawstring 300 will limit the height of the restricted area 120. When inflated to a preset degree, the drawstring 300 will be disconnected along the weakening line 330, so that the top and bottom of the airbag 100 are no longer connected, and the height of the restricted area 120 will no longer be limited by the drawstring 300 and will gradually increase.
[0049] Since the drawstrings 300 extend along the Y direction for a certain length, each drawstring 300 will separate the inflatable chamber 110 into multiple areas, which may affect the gas flow between the areas. Figure 8A 、 Figure 8B 、 Figure 8C 、 Figure 8D 、 Figure 8E and Figure 8F As shown, at least one air guide hole 340 may be provided on the drawstring 300. During the inflation process, gas may enter various areas of the inflatable chamber 110 through the air guide hole 340. Figures 8A-8F As shown, the shape and position of the air guide holes 340 can be set as needed, for example, circular or diamond-shaped, and located at both ends or in the middle of the drawstring 300. The shape of the drawstring 300 can also be set as needed, for example, rectangular, arc-shaped or any other suitable shape.
[0050] Although the drawstrings extend along the Y direction in the above embodiment, in other embodiments, the drawstrings may also extend along the X direction and be spaced apart along the Y direction, such as Figure 9 and Figure 10 shown.
[0051] like Figure 11 As shown, in some embodiments, the restriction structure may also include at least two sewing threads 600, each of which is spaced apart from the other. The sewing threads 600 directly secure the top and bottom of the air bag 100. After inflation, the top and bottom of the air bag 100 are affixed together by the sewing threads 600, so the height of the restricted area 120 is limited to zero, which is equivalent to the situation when the height of the drawstring 300 is zero. The sewing threads 600 are configured to disconnect when the air bag is inflated to a predetermined level, thereby disconnecting the top and bottom of the air bag 100. In this way, the height of the restricted area 120 is no longer restricted and can gradually increase.
[0052] The following describes the working process of the airbag of the present invention by taking the restraining structure as a drawstring as an example:
[0053] After a vehicle collision, the generator 200 will be triggered and generate a large amount of gas, which will fill the inflatable chamber 110 of the airbag 100 and cause the airbag 100 to expand rapidly in a short period of time, thereby lifting the seat 500 and the legs and buttocks of the occupant 400 to prevent the occupant 400 from diving; Figure 12 As shown, in the early stage of inflation, the drawstring 300 will pull the top and bottom of the air bag 100, thereby limiting the height of the restricted area 120. The height of the restricted area 120 will be lower than that of other areas, forming a concave area. The concave area is located between the legs of the occupant 400, which can prevent the crotch of the occupant 400 from being injured by impact. After inflation to a preset level, as shown in FIG. Figure 13As shown, the drawstring 300 will be disconnected from the top and / or bottom or the drawstring 300 itself will be disconnected and no longer limit the height of the restricted area 120. The height of the restricted area 120 will gradually increase, thereby avoiding the risk of penetration and also helping to protect the lumbar spine of the occupant and prevent diving.
[0054] An embodiment of the present utility model further provides a vehicle seat, which includes the airbag of the above embodiment. The airbag can be installed in the seat cushion of the vehicle seat.
[0055] The airbag of the embodiment of the utility model is provided with a restriction structure in the inflatable chamber 110 of the airbag 100. The restriction structure can form a restricted area 120 on the airbag 100 and limit the height of the restricted area 120 after a collision so that it is lower than other areas of the airbag 100, thereby avoiding impact damage to the crotch of the occupant due to the restricted area 120 being too high; the restriction structure can also be configured to release the height restriction of the restricted area 120 when the airbag 100 is inflated to a preset degree, so that the height of the restricted area 120 gradually increases, thereby avoiding the risk of penetration due to the height restriction of the restricted area 120, and can also help protect the lumbar spine of the occupant and prevent diving.
[0056] It should be noted that the present invention (e.g., the utility model concept, etc.) has been described in the specification of this patent document and / or illustrated in the drawings based on exemplary embodiments; the embodiments of the present invention are presented only by way of example and are not intended to limit the scope of the present invention. The structure and / or arrangement of the elements of the utility model concept embodied in the present invention as described in the specification and / or illustrated in the drawings is merely illustrative. Although exemplary embodiments of the present invention have been described in detail in this patent document, it is readily understood by those skilled in the art that equivalents, modifications, variations, etc. of the subject matter of the exemplary embodiments and alternative embodiments are possible and are considered to be within the scope of the present invention; all such subject matters (e.g., modifications, variations, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. It should also be noted that various / other modifications, changes, substitutions, equivalents, changes, omissions, etc. may be made in the configuration and / or arrangement of the exemplary embodiments (e.g., in terms of concept, design, structure, device, form, assembly, construction, means, function, system, process / method, step, order of process / method steps, operation, operating conditions, performance, material, composition, combination, etc.) without departing from the scope of the present invention; all of these subjects (e.g., modifications, changes, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. The scope of the present invention is not intended to be limited to the subject matter described in the description and / or drawings of this patent document (e.g., details, structure, function, material, behavior, step, order, system, result, etc.). Considering that the claims of this patent document will be appropriately interpreted to cover the full scope of the subject matter of the present invention (e.g., including any and all such modifications, changes, embodiments, combinations, equivalents, etc.); it should be understood that the terminology used in this patent document is intended to provide a description of the subject matter of the exemplary embodiments, and not as a limitation on the scope of the present invention.
[0057] It should also be noted that, depending on the exemplary embodiments, the present invention may include conventional technologies (such as technologies implemented and / or integrated in the exemplary embodiments, modifications, variations, combinations, equivalents), or may include any other applicable technologies (present and / or future) that have the ability to perform the functions and processes / operations described in the specification and / or illustrated in the figures. All of these technologies (such as technologies implemented in embodiments, modifications, variations, combinations, equivalents, etc.) are considered to be within the scope of the present invention of this patent document.
Claims
1. An airbag comprising an airbag and a generator installed in a vehicle seat, characterized in that: The airbag has an inflatable chamber, in which a restriction structure is provided. The generator is used to be triggered when a vehicle collision occurs to generate gas to fill the inflatable chamber. The restriction structure is configured to form a restricted area on the airbag and to limit the height of the restricted area after the airbag is inflated, so that the height of the restricted area is lower than that of other areas of the airbag.
2. The airbag according to claim 1, characterized in that The restriction structure is further configured to release the height restriction of the restricted area when the airbag is inflated to a preset degree, so that the height of the restricted area gradually increases.
3. The airbag according to claim 2, characterized in that: The limiting structure includes at least two drawstrings, which are arranged in sequence at intervals. The two ends of the drawstrings are respectively fixed to the top and bottom of the air bag. After the air bag is inflated, the drawstrings pull the top and bottom of the air bag to limit the height of the air bag in the restricted area.
4. The airbag according to claim 3, characterized in that: The drawstring is configured to be detachably fixed to the top and / or bottom of the airbag. Before the airbag is inflated to a preset degree, the drawstring is fixed to the top and bottom of the airbag to limit the height of the restricted area; when the airbag is inflated to a preset degree, the drawstring is disconnected from the top and / or bottom of the airbag to release the height restriction of the restricted area.
5. The airbag according to claim 4, characterized in that: The drawstring is fixed to the top and bottom of the airbag by sewing threads, and the sewing threads connecting the drawstring and the top and / or bottom of the airbag are configured to break when the airbag is inflated to a preset degree.
6. The airbag according to claim 3, characterized in that: The drawstring is provided with a folding portion, which is pre-stitched by a sacrificial thread to maintain a folded state. The sacrificial thread is configured to keep the folding portion in a folded state before the airbag is inflated to a preset degree, and to break when the airbag is inflated to a preset degree to unfold the folding portion.
7. The airbag according to claim 3, characterized in that: A weakening line is provided on the drawstring, and when the air bag is inflated to a preset degree, the drawstring is broken along the weakening line.
8. The airbag according to claim 3, characterized in that: The drawstring is provided with at least one air guide hole.
9. The airbag according to claim 2, characterized in that: The limiting structure includes at least two sewing threads, each of which is arranged in sequence and spaced apart, and the sewing threads fix the top and the bottom of the air bag.
10. The airbag according to claim 9, characterized in that: The sewing thread is configured to break when the air bag is inflated to a preset degree, so that the top and bottom of the air bag are disconnected.
11. A vehicle seat, characterized in that: The vehicle comprises the airbag according to any one of claims 1 to 10, wherein the airbag is arranged in a seat cushion of the vehicle seat.