Safety air bag, safety air bag device and vehicle

Abstract

The present application relates to an airbag for protecting an occupant of a vehicle. The safety air bag comprises a built-in separation structure, the safety air bag is divided into a first cavity and a second cavity through the separation structure, and the separation structure is used for forming an air pressure difference between the first cavity and the second cavity when the safety air bag is inflated and unfolded. A gas guide opening is formed between the first cavity and the second cavity through the separation structure, and gas entering the first cavity can deflect downwards through the gas guide opening and flow into the second cavity. The invention further relates to an airbag device and a vehicle. According to the safety air bag, the unfolding process of the safety air bag can be optimized, and the safety and stability of the safety air bag in the unfolding process are improved.

Description

Technical Field

[0001] The present invention relates generally to vehicle safety systems and, more particularly, to an airbag, an airbag device, and a vehicle. Background Art

[0002] Airbags are widely used in modern vehicles as a safety measure in emergencies such as collisions and rollovers. For front-seat occupants, particularly the front passenger, an airbag is typically installed in the instrument panel ahead of the front seat, acting as a frontal airbag to protect occupants, particularly during a frontal collision. These airbags can be inflated, expanded, and deployed in a short period of time to prevent the occupant's head from colliding with the instrument panel. During inflation and deployment, the high-pressure airflow can generate significant impact force.

[0003] Typically, Figure 1 As shown, vehicle interiors have developed rapidly in recent years. A relatively tall display screen 5 is often installed on the instrument panel in front of an occupant 3, particularly the front passenger 3. Such a display screen 5 can seriously hinder the deployment of an airbag 4 in an airbag device 1 located in the instrument panel 2. Furthermore, during deployment, the inflated airbag 4 can impact the display screen 5, causing splashes that could injure the occupant 3.

[0004] For this purpose, for example Figure 2 As shown, the prior art proposes adding a gas guide 6 to the airbag 4 to enable the airbag 4 to bounce over the display screen 5 during the initial deployment. However, in this solution, the presence of the gas guide 6 may cause high-pressure gas to flow directly toward the occupant 3 and inflate the airbag 4, causing premature contact with the occupant 3 during deployment, potentially injuring the occupant 3. Furthermore, the unrestrained gas guide 6 may cause significant oscillation within the airbag 4 due to airflow, resulting in inconsistent deployment posture of the airbag 4. Summary of the Invention

[0005] The purpose of this application is to provide an airbag, an airbag device and a vehicle, which can overcome at least one technical problem faced in the prior art, thereby in particular being able to optimize the deployment process of the airbag and improve the safety and stability of the airbag during the deployment process.

[0006] According to a first aspect of the present application, an airbag is provided for protecting a vehicle occupant. The airbag includes a built-in partition structure that divides the airbag into a first cavity and a second cavity. The partition structure is configured to create a pressure differential between the first cavity and the second cavity during inflation and deployment of the airbag. Furthermore, the partition structure provides an air guide port between the first cavity and the second cavity, allowing gas entering the first cavity to be deflected downward through the air guide port and flow into the second cavity.

[0007] According to one embodiment of the present application, the airbag is used to protect front passengers of a vehicle, and the airbag can be installed inside a dashboard of the vehicle in a region of the dashboard facing a windshield.

[0008] According to an embodiment of the present application, in the deployed state of the airbag, the first cavity is located on a side close to the windshield of the vehicle, and the second cavity is located on a side away from the windshield of the vehicle.

[0009] According to an embodiment of the present application, when the airbag is deployed, the air guide port is located between an end of the instrument panel facing the front passenger and an end of the airbag facing the front passenger in the longitudinal direction of the vehicle.

[0010] According to one embodiment of the present application, the volume ratio of the first cavity to the second cavity is between 1:4 and 1:1.

[0011] According to one embodiment of the present application, the first cavity and the second cavity are fluidically connected to each other only through the air guide port.

[0012] According to one embodiment of the present application, the airbag includes an airbag body fabric that externally limits the interior space of the airbag and forms the airbag body, and the partition structure is configured as a partition sheet.

[0013] According to one embodiment of the present application, the separator has holes forming air guide ports.

[0014] According to one embodiment of the present application, the entire outer periphery of the separator having holes is connected to the fabric of the airbag body.

[0015] According to one embodiment of the present application, the separator is partially connected to the airbag main body fabric, and a first air guide port is formed between the area of ​​the separator that is not connected to the airbag main body fabric and the airbag main body fabric.

[0016] According to one embodiment of the present application, the separator is configured as a single-connected separator or the separator has a hole forming the second air guide port.

[0017] According to one embodiment of the present application, the separator includes two side edges opposite to each other in the transverse direction of the vehicle and a front edge and a rear edge opposite to each other in the longitudinal direction of the vehicle.

[0018] According to one embodiment of the present application, the airbag main body fabric includes two lateral fabrics opposite to each other in the transverse direction of the vehicle, a peripheral fabric extending between the two lateral fabrics in the transverse direction of the vehicle, and a root fabric having a gas inlet, wherein the front edge of the separator is connected to the root fabric of the airbag main body, and the side edge of the separator is connected to the lateral fabric of the airbag main body or connected in the area of ​​the peripheral fabric of the airbag main body facing the windshield.

[0019] According to one embodiment of the present application, the rear edge of the separation sheet is connected to a region of the airbag main body fabric facing the occupant.

[0020] According to an embodiment of the present application, when the airbag is deployed, the rear edge of the partition is arranged to avoid the contact area between the occupant's head and the airbag.

[0021] According to one embodiment of the present application, the rear edge of the separator is not connected to the fabric of the airbag body.

[0022] According to one embodiment of the present application, the rear edge of the separator is bent toward the front edge.

[0023] According to one embodiment of the present application, the width of the separator in the lateral direction of the vehicle in the flat state is greater than the distance between the two side edges of the separator in the lateral direction of the vehicle in the deployed state of the airbag.

[0024] According to one embodiment of the present application, the two side edges of the separator are connected to the fabric of the airbag body at a distance from each other.

[0025] According to one embodiment of the present application, the two side edges of the separator are connected to the fabric of the airbag body so as to overlap with each other.

[0026] According to an embodiment of the present application, the two side edges of the separator are connected to each other in a region of the peripheral fabric of the airbag body facing the windshield so as to overlap with each other.

[0027] According to one embodiment of the present application, a ratio of a length of a rear edge of the separator to a maximum distance between the two side edges of the separator in a transverse direction of the vehicle in a deployed state of the airbag is between 1.5 and 4.

[0028] According to one embodiment of the present application, the ratio of the length of the front edge of the separator to the width of the root fabric of the airbag body in the transverse direction of the vehicle is between 1.2 and 3.

[0029] According to one embodiment of the present application, the airbag includes an airbag body fabric that defines the internal space of the airbag relative to the external boundary and forms the airbag body, and the partition structure is constructed as a tubular partition structure, which is at least partially connected to the airbag body fabric in the area of ​​the airbag body facing the windshield.

[0030] According to one embodiment of the present application, one end of the tubular partition structure forms a first air guide port disposed obliquely downward; and / or the tubular partition structure has a hole forming a second air guide port. According to one embodiment of the present application, when the airbag is deployed, the airbag has a storage space in an area facing the vehicle's dashboard.

[0031] According to a second aspect of the present application, an airbag device is provided. The airbag device includes the airbag according to the first aspect of the present application and a gas generator.

[0032] According to an embodiment of the present application, the gas generator and the airbag are arranged such that when the airbag is inflated and deployed, the first cavity of the airbag is inflated faster than the second cavity.

[0033] According to one embodiment of the present application, the gas generator is directly in fluid communication with the first cavity of the airbag but is not directly in fluid communication with the second cavity of the airbag.

[0034] According to a third aspect of the present application, a vehicle is provided. The vehicle includes the airbag according to the first aspect of the present application or the airbag device according to the second aspect of the present application.

[0035] According to one embodiment of the present application, the airbag device is a passenger airbag device.

[0036] According to one embodiment of the present application, the vehicle includes a display screen arranged on the dashboard and extending upward from the dashboard, and the airbag or the airbag device is installed in the dashboard in the longitudinal direction of the vehicle in front of the display screen in the area of ​​the dashboard facing the windshield.

[0037] Other features of the present application can be found in the drawings and in the detailed description. All features and feature combinations mentioned above in the description and the features and feature combinations mentioned below in the detailed description and / or shown individually in the drawings can be used not only in the respectively indicated combination, but also in other combinations or in isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Aspects of the present application will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which:

[0039] Figure 1 Schematically illustrates the deployment of an airbag when a display screen is present on the instrument panel in the prior art;

[0040] Figure 2 Schematically illustrates the deployment of an airbag with an air guide cylinder in the prior art;

[0041] Figure 3 and Figure 4 Showing the deployment process of an airbag according to some embodiments of the present application;

[0042] Figure 5 Shown in accordance with Figure 3 and Figure 4 A schematic perspective view of an airbag;

[0043] Figure 6 Shown in accordance with Figure 3 and Figure 4 A schematic tiled diagram of a partition structure of an airbag;

[0044] Figure 7 and Figure 8 Schematically illustrates the deployment of the airbag when the air guide port is designed at different positions of the partition structure;

[0045] Figure 9 Schematic perspective views showing airbags after deployment according to other embodiments of the present application;

[0046] Figure 10 Shown in accordance with Figure 9 A schematic tiled diagram of a partition structure of an airbag;

[0047] Figure 11 Schematic tiling diagrams showing partition structures of airbags according to other embodiments of the present application;

[0048] Figure 12 A schematic perspective view showing an airbag according to some embodiments of the present application;

[0049] Figure 13A schematic perspective view showing an airbag according to some embodiments of the present application;

[0050] Figure 14 A schematic perspective view showing an airbag according to some embodiments of the present application;

[0051] Figure 15 An exploded view of an airbag device according to some embodiments of the present application is shown. DETAILED DESCRIPTION

[0052] The present application will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present application. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present application more complete and to fully illustrate the scope of protection of the present application to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments.

[0053] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit this application. Unless otherwise defined, all terms (including technical and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art. For the sake of brevity and / or clarity, well-known functions or structures may not be described in detail.

[0054] As used in this specification, the singular forms "a," "an," "said," and "the" include the plural forms unless otherwise expressly stated. The terms "include," "comprise," and "contain" as used in this specification indicate the presence of the claimed features, but do not exclude the presence of one or more additional features. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0055] In the specification, when an element is referred to as being “on,” “attached” to, “connected” to, “coupled to,” or “contacting” another element, etc., the element may be directly on, attached to, connected to, coupled to, or contacting the other element, or intervening elements may be present.

[0056] In the specification, spatial terms such as "upper," "lower," "front," "back," "top," and "bottom" may be used to describe the relationship of one feature to another feature in the accompanying drawings. It should be understood that these spatial terms encompass different orientations of the device in use or operation, in addition to the orientation shown in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, a feature previously described as "below" another feature may now be described as "above" the other feature. The device may also be otherwise oriented (rotated 90 degrees or in other orientations), and the relative spatial relationships will be interpreted accordingly.

[0057] Figure 4 A schematic cross-sectional view of an airbag 10 after deployment according to some embodiments of the present application is shown. The cross-sectional plane may be a vertical plane substantially parallel to the longitudinal direction X of the vehicle and passing through the airbag 10. The airbag 10 may be used to protect vehicle occupants, such as front seat occupants, and may be configured, for example, as a frontal airbag. Figure 4 The airbag 10 shown can be designed as an airbag for a front passenger. For example, it is also conceivable that the airbag 10 is designed as an airbag for the driver.

[0058] The vehicle may include a windshield 7 and an instrument panel 2. The airbag device 1 including the airbag 10 and the gas generator 20 may be installed in the upper region of the instrument panel 2 of the vehicle, particularly in the region facing the windshield 7. Figure 4 As shown, when a display screen 5 is mounted on the instrument panel 2, the airbag device 1 can be installed in the instrument panel 2 in the longitudinal direction of the vehicle, in front of the display screen 5. For example, when the vehicle collides, the vehicle's airbag control unit can trigger the gas generator 20 to generate high-pressure gas according to the ignition strategy and instructions, thereby inflating the compressed or folded airbag 10 and causing it to expand and deploy, thereby protecting the corresponding front passenger 3, and particularly preventing the front passenger 3's head from colliding with the instrument panel 2 or the display screen 5 mounted on the instrument panel 2.

[0059] Continue to refer to Figure 4The airbag 10 may include a built-in partition structure 11, which can be divided into a first chamber or upper chamber 12 and a second chamber or lower chamber 13 by the partition structure 11. In the deployed state of the airbag 10, the main part of the first chamber or upper chamber 12 can be located on the side close to the vehicle's windshield 7, i.e., the so-called upper side, while the main part of the second chamber or lower chamber 13 can be located on the side close to the vehicle's instrument panel 2 (or away from the vehicle's windshield 7), i.e., the so-called lower side. The partition structure 11 can be configured to form an air pressure difference between the upper chamber 12 and the lower chamber 13 when the airbag 10 is inflated and deployed. In addition, an air guide port 14 can be provided between the upper chamber 12 and the lower chamber 13 by the partition structure 11. Gas entering the upper chamber 12 can be deflected via the air guide port 14 and flow downward into the lower chamber 13, for example.

[0060] Within the scope of this application, a "cavity" can be understood as a chamber, volume, or space within the airbag 10 that can be filled with gas. The division of the cavity by the partition structure 11 does not necessarily mean that there must be clear boundaries between the various cavities. Due to the air flow permeability of the air guide port 14, the aforementioned boundaries may be relatively vague, especially in the area of ​​the air guide port 14.

[0061] In the scope of the present application, the downward deflection of the gas via the gas guide port 14 can be understood in particular as causing the main flow direction of the gas to be deflected downward relative to the main flow direction of the gas in the upper cavity 12 via the gas guide port 14. The deflection angle of the main flow direction of the gas can be 15° to 120°, preferably 60° to 100°. In particular, the gas guide port 14 can deflect the main flow direction of the gas below the horizontal direction. For example, the main flow direction of the gas flowing into the lower cavity 13 via the gas guide port 14 can be at an angle of 5° to 135°, preferably 45° to 120°, and particularly preferably 60° to 100° relative to the horizontal direction.

[0062] Specifically, Figure 3 and Figure 4 The following schematically illustrates the deployment process of the airbag 10 according to some embodiments of the present application. Figure 3 The airbag 10 is schematically shown as not fully deployed. Figure 4The airbag 10 is schematically shown in a state where deployment is substantially complete. During deployment, for example, most, or in particular, all, of the gas from the inflator 20 can initially be filled into the upper chamber 12 of the airbag 10. In contrast, the lower chamber 13 of the airbag 10 can temporarily remain substantially uninflated or only slightly inflated due to the presence of the partition structure 11, and thus have a relatively small volume. As a result, the upper chamber 12 can be inflated more rapidly than the lower chamber 13, expanding upward from the upper side of the instrument panel 2, possibly resting against the vehicle's windshield 7, and extending rearward along the windshield 7 in the longitudinal direction of the vehicle toward the occupant 3, thereby deploying.

[0063] In the case where the display screen 5 is mounted on the instrument panel 2, the inflation process of the airbag 10 can advantageously cause the upper chamber 12, which is filled more quickly or substantially filled and deployed, to drive the lower chamber 13, which is filled more slowly or substantially not inflated, to jump up and over the display screen 5. This prevents the airbag 10 from violently colliding with the display screen 5 during this process. Figure 3 During or after this process, such as Figure 4 As shown, due to the pressure difference formed between the upper cavity 12 and the lower cavity 13 by the partition structure 11, the gas flowing into the upper cavity 12 can be deflected downward through the gas guide 14 and flow into the lower cavity 13. The gas flowing downward through the gas guide 14 can further fill the lower cavity 13 and (advantageously, after the airbag 10 passes over the display screen 5) cause it to expand downward to a greater extent and only expand to a lesser extent toward the occupant 3, rather than as shown in FIG. Figure 2 As shown in FIG, the cam is deployed to a greater extent in the direction of the occupant 3.

[0064] In this application, the provision of a partition structure 11 advantageously controls the direction of airflow within the airbag 10, thereby optimizing the deployment process. The airbag 10 can be configured to initially spring upward and then deploy downward in a desired manner. During this process, the airflow originating from the gas generator 20 in the upper chamber 12 primarily follows the direction of the vehicle's windshield 7. The airflow (herein referred to as its main flow direction) is then deflected downward under the guidance of the air guide 14, flowing from the upper chamber 12 into the lower chamber 13. This prevents the airbag 10, particularly the distal end of the airbag 10 near the occupant 3, from prematurely deploying under the impact of high-pressure gas, potentially causing injury to the occupant 3. This improves the safety of the airbag 10 deployment process. Furthermore, the posture of the airbag 10 during deployment is constrained, enhancing its stability.

[0065] In some embodiments of the present application, the gas generator 20 and the airbag 10 can be specifically configured and designed to achieve a desired pressure difference between the upper cavity 12 and the lower cavity 13 when the airbag 10 is inflated, and thus achieve the advantageous deployment process described above.

[0066] Without limiting the generality, in some embodiments, a portion of the gas generated by the gas generator 20 can be directly provided to the upper chamber 12 of the airbag 10, while another portion of the gas can be directly provided to the lower chamber 10 of the airbag 10. The gas portions provided to the upper chamber 12 and the lower chamber 13 of the airbag 10, respectively, as well as the volumes or capacities of the upper chamber 12 and the lower chamber 13, can be specifically selected to achieve a desired pressure difference. Purely by way of example, the ratio of the gas portions provided to the upper chamber 12 and the lower chamber 13 of the airbag 10, respectively, can be 1:1, while the volume of the upper chamber 12 can be smaller, in particular significantly smaller, than that of the lower chamber 13 (for example, the volume ratio of the upper chamber 12 to the lower chamber 13 is 1:5). Thus, during the deployment of the airbag 10, although the amount of gas flowing into the upper cavity 12 and the lower cavity 13 is substantially the same, the upper cavity 12 can be filled faster than the lower cavity 13 and therefore has a higher gas pressure, thereby achieving the advantageous deployment process described above.

[0067] Preferably, in some embodiments, the gas generator 20 may be in direct fluid communication only with the upper chamber 12 of the airbag 10, and not directly with the lower chamber 13 of the airbag 10. That is, all gas from the gas generator 20 may be directly provided to the upper chamber 12 of the airbag 10, while the lower chamber 13 of the airbag 10 does not directly receive gas from the gas generator 20. In this case, the lower chamber 13 of the airbag 10 is in fluid communication with the upper chamber 12 only through the gas guide port 14 formed by the partition structure 11, and is indirectly inflated through the gas guide port 14. It is particularly preferred that the volume ratio of the upper chamber 12 to the lower chamber 13 is between 1:4 and 1:1.

[0068] In some embodiments, it is advantageous for the deployment process of the airbag 10 to be as follows: Figure 4 As shown, when the airbag 10 is deployed, the air guide 14 is located in the longitudinal direction of the vehicle between the end 21 of the instrument panel 2 facing the front passenger 3 and the end 15 of the airbag 10 facing the passenger 3. Thus, after the airbag 10, particularly the upper chamber 12, has deployed toward the passenger 3 and extended beyond the instrument panel 2, the lower chamber 13 is inflated through the air guide 14 and deployed further downward. This is particularly advantageous when the display screen 5 is mounted on the instrument panel 2, as it prevents the lower chamber 13 from colliding with the display screen 5 due to premature deployment and ensures smooth deployment of the airbag 10.

[0069] The following combination Figure 4 、 Figure 7 and Figure 8 The following describes the effects of different design positions of the air guide port 14 in the vehicle's longitudinal direction X on the deployment process of the airbag 10. For ease of analysis, the partition structure 11, when the airbag 10 is deployed, generally follows the path of the vehicle's windshield 7. Furthermore, for clarity, in the vehicle's longitudinal direction X, assuming that the airbag 10 is in a free state after deployment (i.e., fully inflated and not subject to any external forces), the distance between the end 21 of the instrument panel 2 facing the front passenger 3 and the installation location of the airbag device 1 on the instrument panel 12 is L1, while the distance between the end 15 of the airbag 10 facing the passenger 3 and the installation location of the airbag device 1 on the instrument panel 12 is L2.

[0070] Figure 4 FIG. 1 shows the inflation of the airbag 10, in particular the lower chamber 13 of the airbag 10, when the distance between the center of the air guide opening 14 and the installation position of the airbag device 1 on the instrument panel 12 is approximately (L2-L1) / 2 (i.e., the air guide opening 14 is substantially in the middle). Here, the air flow can flow from the upper chamber 12 to the lower chamber 13 substantially in the middle of the airbag 10 via the air guide opening 14, and has a main flow direction substantially perpendicular to the windshield 7 of the vehicle (see FIG. 2 ). Figure 4 In contrast, Figure 7 It is shown that the distance between the center of the air guide port 14 and the installation position of the airbag device 1 on the instrument panel 12 is less than (L2-L1) / 2 (ie, Figure 4 In the case where the air guide port 14 is further forward than in the case where the air bag 10 is inflated, in particular, the lower chamber 13 of the air bag 10 is inflated. Here, the main flow direction of the airflow flowing from the upper chamber 12 through the air guide port 14 into the lower chamber 13 can be deflected toward the occupant 3. Figure 4 situation (in which Figure 7 Compared with the airbag 10 (depicted by a dotted line in FIG), the airbag 10 can have a deployment posture that is more biased towards the occupant 3 under the action of the airflow (which is in FIG). Figure 7 depicted by solid lines). Figure 8 It is shown that the distance between the center of the air guide port 14 and the installation position of the airbag device 1 on the instrument panel 12 is greater than (L2-L1) / 2 (ie, Figure 4 In the case where the air guide port 14 is further back than the case where the air bag 10 is inflated, in particular, the lower chamber 13 of the air bag 10 is inflated. Here, the main flow direction of the airflow flowing from the upper chamber 12 through the air guide port 14 into the lower chamber 13 can be deflected toward the instrument panel 2. Figure 4 situation (in which Figure 8 Compared with the dotted line in FIG, the airbag 10 can have a deployment posture that is more biased towards the instrument panel 2 under the action of the airflow (which is depicted in dotted lines in FIG). Figure 8 depicted by solid lines).

[0071] Based on the above analysis, it is easy to understand that the arrangement of the partition structure 11 within the airbag 10 can also affect the deployment process and posture of the airbag 10. By intentionally selecting the configuration and location of the partition structure 11 and the air guide port 14, the deployment process and posture of the airbag 10 can be specifically controlled.

[0072] Figure 5 A schematic perspective view of an airbag 10 according to some embodiments of the present application is shown. The airbag 10 may include an airbag main body fabric that defines the interior space of the airbag 10 and forms the airbag main body. In this embodiment, the airbag main body fabric may include two side panels 101 and 102 that oppose each other in the transverse direction of the vehicle, a peripheral panel 103 that extends between the two side panels 101 and 102 in the transverse direction of the vehicle, and a root panel 104 having a gas inlet 105. The two side panels 101 and 102 may each be connected, for example, by sewing, to one of the two long sides of the peripheral panel 103, and the root panel 104 may be connected, for example, by sewing, to the two side panels 101 and 102 and the two short sides of the peripheral panel 103, thereby forming the airbag main body 10. The gas inlet 105 of the root panel 104 may be connected to the gas outlet of the gas generator 20, so that gas from the gas generator 20 can flow into the airbag 10 through the gas inlet 105.

[0073] In the scope of the present application, when referring to the “connection” between the fabrics of the airbag 10 , such connection may include but is not limited to sewing, heat welding, bonding, or integral weaving of the fabrics.

[0074] It should be understood that the airbag body of the airbag 10 is not limited to the illustrated embodiment and can have a variety of structural types. Therefore, the number and shape of the panels of the airbag body fabric of the airbag 10 can be flexibly selected according to specific needs. For example, in other embodiments not shown, the airbag body of the airbag 10 can also be composed of two side panels sewn together.

[0075] Furthermore, it is advantageous if a display screen 5 is arranged on the instrument panel 2. Figure 5As shown, when the airbag 10 is deployed, the airbag 10 may have a receiving space 16 in an area facing the vehicle's instrument panel 2. The receiving space 16 may be recessed toward the interior of the airbag 10, so that the display screen 5 may be at least partially received within the receiving space 16. The provision of the receiving space 16 can advantageously reduce the impact of the airbag 10 on the display screen 5 during deployment, thereby ensuring smooth deployment of the airbag 10.

[0076] In the present application, the partition structure 11 can be implemented in various ways. In some embodiments of the present application, the partition structure 11 can be configured as a partition sheet. The partition sheet 11 can have a hole 114 forming an air guide port 14, which can be seen in FIG. Figure 5 、 Figure 6 and Figure 11 Alternatively or additionally, the separator 11 may be partially connected to the airbag main body fabric, and an air guide port 14 is formed between the area of ​​the separator 11 not connected to the airbag main body fabric and the airbag main body fabric. Figures 9 to 12 and Figure 14 .

[0077] The following describes some specific embodiments of the present application in conjunction with the accompanying drawings. Note that the specific embodiments described below are merely exemplary illustrations of the airbag of the present application and do not constitute a limitation on the scope of protection defined by the claims.

[0078] In some embodiments according to the present application, Figure 5 and Figure 6 As shown, the partition structure 11 can be constructed as a partition sheet 11' having a hole 114 forming an air guide port 14. The entire outer periphery of the partition sheet 11' having the air guide port 14 is connected to the airbag main body fabric, in particular, sewn to the airbag main body fabric. Therefore, except for the air guide port 14 or the hole 114, the partition sheet 11' divides the internal space of the airbag 10 into an upper cavity 12 and a lower cavity 13 that are independent of each other. Specifically, in the case of Figure 5 and Figure 6In the illustrated embodiment, the separator 11' may include two side edges 112 opposing each other in the transverse direction of the vehicle, and a front edge 113 and a rear edge 111 opposing each other in the longitudinal direction of the vehicle. The front edge 113 of the separator 11' may be sewn to the root fabric 104 of the airbag body, the two side edges 112 of the separator 11' may be sewn to each of the lateral fabrics 101 and 102 of the airbag body, and the rear edge 111 of the separator 11' may be sewn to the area of ​​the peripheral fabric 103 facing the occupant. Thus, the upper chamber 12 of the airbag 10 can be enclosed by the separator 11', the upper halves of the lateral fabrics 101 and 102 divided by the separator 11', a portion of the root fabric 104 (here, the entire root fabric 104), and the upper halves of the peripheral fabric 103 divided by the separator 11'. The lower cavity 13 of the airbag 10 can be enclosed by the separator 11 ′, the lower halves of the lateral fabrics 101 and 102 divided by the separator 11 ′, the lower halves of the peripheral fabric 103 divided by the separator 11 ′, and optionally a portion of the root fabric 104 .

[0079] In some embodiments of the present application, the shape and size of the separator 11' can match the shape of the airbag 10 after deployment, so that after the airbag 10 is deployed, the separator 11' is basically fully expanded and stretched due to the expansion of the airbag main body fabric. Figure 5 and Figure 14 In other embodiments not shown in the present application, the separator 11' may have a larger area compared to a cross-section taken along the sewn edges 111, 112, and 113 of the separator 11' on the airbag body in the deployed state of the airbag 10, so that after the airbag 10 is deployed, the separator 11' may not be fully expanded and may therefore have a sagging shape.

[0080] Figure 9 Schematic perspective views of airbags 10 according to other embodiments of the present application are shown. In this embodiment, the structure of the airbag body of the airbag 10 is the same as that according to Figure 5 The embodiment of is basically similar and therefore will not be described in detail. Figure 5 Compared with the airbag 10, Figure 9 The airbag 10 differs in particular in the construction type of the partition structure 11. Figure 10As shown, the partition structure 11 can be constructed as, for example, a single-connected partition 11". The edge of the single-connected partition 11" can be only partially sewn to the airbag main body fabric, and an air guide port 14 is formed between the area of ​​the single-connected partition 11" that is not sewn to the airbag main body fabric and the airbag main body fabric. "Single-connected" should be understood here as topologically single-connected, that is, the area surrounded by the outer edges 111, 112, 113 of the partition 11" does not include any macroscopic holes.

[0081] In accordance with Figure 9 and Figure 10 In an embodiment, the front edge 113 and the two side edges 112 of the separator 11" can be sewn to the airbag main body fabric, while the rear edge of the separator 11" is not sewn to the airbag main body fabric. As a result, an air guide 14 for airflow to pass through is formed between the rear edge of the separator 11" and the airbag main body fabric. Advantageously, the rear edge 111 of the separator 11" is bent toward the front edge 113. This enables optimized airflow from the upper cavity 12 to the lower cavity 13. In some embodiments, the rear edge 111 of the separator 11" can also be straight (see Figure 14 ).

[0082] In some embodiments, as Figure 9 As shown, the front edge 113 of the separator 11" can be sewn to the root fabric 104 of the airbag body, and the two side edges 112 of the separator 11" are sewn to the airbag body along the sewing lines of the lateral fabrics 101, 102 and the peripheral fabric 103 of the airbag body. Here, the upper cavity of the airbag 10 can be formed by the area difference between the separator 11" and the corresponding airbag body fabric (here, the area of ​​the peripheral fabric 103 facing the windshield). It can be stipulated that the width of the separator 11" in the transverse direction of the vehicle in the flat state (reference Figure 10 ) is greater than the distance between the two side edges 112 of the partition sheet 11″ in the transverse direction of the vehicle in the deployed state of the airbag 10 (reference Figure 9 ). Preferably, the ratio of the length L3 of the front edge 113 of the separator 11" to the width L4 of the root fabric of the airbag body in the transverse direction of the vehicle can be between 1.2 and 3. In addition, the ratio of the length L5 of the rear edge 111 of the separator 11" to the maximum distance L6 between the two side edges 112 of the separator 11" in the transverse direction of the vehicle when the airbag 10 is deployed can be between 1.5 and 4.

[0083] In some embodiments not shown, the two side edges 112 of the separator 11" may be sewn into the area of ​​the peripheral fabric 103 of the airbag body facing the windshield. Therefore, when the airbag 10 is deployed, the separator 11" may not span the two lateral fabrics 101, 102 of the airbag body in the transverse direction of the vehicle. At this time, the distance between the two side edges 112 of the separator 11" may be smaller than the distance between the two lateral fabrics 101, 102 of the airbag body or smaller than the corresponding width of the peripheral fabric 103 of the airbag body.

[0084] Figure 12 An embodiment of this is shown. In this embodiment, the two side edges 112 of the separator 11" can be connected to the airbag body fabric, in particular to the area of ​​the peripheral fabric 103 of the airbag body facing the windshield, so as to overlap with each other. In this case, the distance between the two side edges 112 of the separator 11" can be understood as zero.

[0085] In other embodiments not shown, the two side edges 112 of the separator 11" can also be sewn to each of the lateral fabrics 101 and 102 of the airbag body. It is also conceivable that the two side edges 112 of the separator 11" can be sewn to the airbag body fabric at different height levels. For example, one side edge 112 of the separator 11" can be sewn to the lateral fabric 101 of the airbag body, while the other side edge 112 of the separator 11" can be sewn to the peripheral fabric 101 of the airbag body.

[0086] In addition, the partition structure 11 is Figure 6 and Figure 10 It is also possible to combine the described embodiments with each other. Figure 11 As shown, in some embodiments, the separator 11 ″ itself may have holes 114 or (second) air guide ports 14 for air flow to flow through.

[0087] Figure 13 Schematic perspective views of airbags 10 according to other embodiments of the present application are shown. Here, the partition structure 11 can be configured as a tubular partition structure 11'', one end of which can be connected to the gas generator, and the other end can form an air guide port 14. The tubular partition structure 11'' can be at least partially connected to the airbag body fabric in the area of ​​the airbag body facing the windshield. For example, Figure 13In the embodiment shown, only the portion 115 of the tubular partition structure 11"' close to the air guide port 14 is connected to the peripheral fabric 103 of the airbag body. Preferably, the air guide port 14 of the tubular partition structure 11"' is arranged obliquely downward, so that the airflow flowing into the tubular partition structure 11"' (i.e., the first cavity or the upper cavity) can be deflected through the air guide port 14 and flow downward into the second cavity or the lower cavity. Alternatively or additionally, in other embodiments, the tubular partition structure 11"' itself may also have an air guide port or a hole for airflow to flow through.

[0088] Without limitation, fluid communication between the upper cavity 12 and the lower cavity 13 can also be achieved through the air permeability of the partition structure 11 itself. For example, the partition structure 11 can have a mesh structure or be made of a breathable material. In this sense, the "air guide port" can be a mesh or loose (possibly microscopic) holes inherent in the material itself. By carefully selecting the material and weaving method of the partition structure 11, the desired deployment process of the airbag 10 can be achieved.

[0089] In some embodiments, it is advantageous to protect occupant 3 if, when the airbag 10 is deployed, the partition structure 11, particularly its rear edge 111 facing the occupant 3, is positioned away from the contact area between the occupant 3's head and the airbag 10. Generally speaking, in a collision, the occupant 3's head may contact the airbag 10 with considerable kinetic energy. By positioning the partition structure 11, particularly its rear edge facing the occupant 3, outside the contact area between the occupant 3's head and the airbag 10, contact with the partition structure 11, potentially causing injury to the occupant 3, can be avoided. Particularly advantageously, the partition structure 11 is positioned so that the occupant 3's head contacts only the lower chamber 13 of the airbag 10. This ensures reliable and gentle protection for the occupant 3.

[0090] Figure 15 An exploded view of an airbag device 1 according to some embodiments of the present application is shown. The airbag device 1 may include the airbag 10 and the gas generator 20 described above. The airbag device 1 may also include a dust cover 30, a retaining ring 40, a housing 50, and an assembly bracket 60. The gas generator 20 may be connected and secured to the airbag 10 via the retaining ring 40, and the dust cover 30 may be used to cover the folded airbag 10. The housing 50 is used to accommodate the folded airbag 10 and is then secured within the vehicle's instrument panel 2 via the assembly bracket 60.

[0091] The exemplary embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and modifications may be made to the exemplary embodiments of the present application without departing from the spirit and scope of the present application. All such changes and modifications are intended to be within the scope of protection of the present application as defined by the claims. The present application is defined by the appended claims, and equivalents of these claims are intended to be included therein.

Claims

1. An airbag for protecting a vehicle occupant, characterized in that: The airbag includes a built-in partition structure, which is divided into a first cavity and a second cavity by the partition structure, wherein the partition structure is configured to form an air pressure difference between the first cavity and the second cavity when the airbag is inflated and deployed, and an air guide port is provided between the first cavity and the second cavity through the partition structure, and the gas entering the first cavity can be deflected downward through the air guide port and flow into the second cavity.

2. The airbag according to claim 1, characterized in that The airbag is used to protect the front occupants of a vehicle, and the airbag can be installed inside the instrument panel of the vehicle in an area of ​​the instrument panel facing the windshield. Preferably: in the deployed state of the airbag, the first cavity is located on the side close to the windshield of the vehicle, and the second cavity is located on the side away from the windshield of the vehicle; and / or in the deployed state of the airbag, the air guide port is located between the end of the instrument panel facing the front occupants and the end of the airbag facing the front occupants in the longitudinal direction of the vehicle.

3. The airbag according to claim 1 or 2, characterized in that: The volume ratio of the first cavity to the second cavity is between 1:4 and 1:1; and / or the first cavity and the second cavity are fluidically connected to each other only through the air guide port; and / or the airbag includes an airbag body fabric that defines an interior space of the airbag relative to an exterior boundary and forms an airbag body, and the partition structure is configured as a partition sheet; wherein preferably: The separator has a hole forming an air guide port, and in particular, the entire outer periphery of the separator with the hole is connected to the fabric of the airbag body; And / or the separator is partially connected to the airbag main body fabric, and a first air guide port is formed between the area of ​​the separator that is not connected to the airbag main body fabric and the airbag main body fabric. In particular, the separator is constructed as a single-connected separator or the separator has a hole that forms a second air guide port.

4. The airbag according to claim 3, characterized in that The separator includes two side edges opposite to each other in the transverse direction of the vehicle and a front edge and a rear edge opposite to each other in the longitudinal direction of the vehicle. Preferably, the airbag main body fabric includes two side fabrics opposite to each other in the transverse direction of the vehicle, a peripheral fabric extending between the two side fabrics in the transverse direction of the vehicle, and a root fabric having a gas inlet, wherein the front edge of the separator is connected to the root fabric of the airbag main body, and the side edges of the separator are connected to the side fabrics of the airbag main body or are connected to the area of ​​the peripheral fabric of the airbag main body facing the windshield. and / or the rear edge of the separator is connected to the area of ​​the airbag main body fabric facing the occupant, in particular, when the airbag is deployed, the rear edge of the separator is arranged to avoid the contact area between the occupant's head and the airbag; And / or the rear edge of the separator is not connected to the fabric of the airbag body, in particular, the rear edge of the separator is bent toward the front edge.

5. The airbag according to claim 4, characterized in that The width of the separator in the transverse direction of the vehicle in the flat state is greater than the spacing between the two side edges of the separator in the transverse direction of the vehicle in the deployed state of the airbag; preferably, the two side edges of the separator are connected to the airbag main body fabric at a distance from each other; and / or the two side edges of the separator are connected to the airbag main body fabric in a manner that overlaps with each other, in particular, the two side edges of the separator are connected to the peripheral fabric of the airbag main body in a manner that overlaps with each other in the area facing the windshield.

6. The airbag according to claim 5, characterized in that The ratio of the length of the rear edge of the separator to the maximum distance between the two side edges of the separator in the transverse direction of the vehicle when the airbag is deployed is between 1.5 and 4; and / or the ratio of the length of the front edge of the separator to the width of the root fabric of the airbag body in the transverse direction of the vehicle is between 1.2 and 3.

7. The airbag according to claim 1 or 2, characterized in that: The airbag includes an airbag main body fabric that forms an internal space of the airbag relative to the external limit and forms the airbag main body. The partition structure is configured as a tubular partition structure, and the tubular partition structure is at least partially connected to the airbag main body fabric in the area of ​​the airbag main body facing the windshield. Preferably: one end of the tubular partition structure forms a first air guide port arranged obliquely downward; and / or the tubular partition structure has a hole that forms a second air guide port.

8. The airbag according to claim 1 or 2, characterized in that: In the deployed state of the airbag, the airbag has a receiving space in the region facing the dashboard of the vehicle.

9. An airbag device, characterized in that: The airbag device includes an airbag and a gas generator according to any one of claims 1 to 8. Preferably, the gas generator and the airbag are arranged so that when the airbag is inflated and deployed, the first cavity of the airbag is inflated faster than the second cavity. In particular, the gas generator is only directly connected to the fluid of the first cavity of the airbag but not directly connected to the fluid of the second cavity of the airbag.

10. A vehicle, characterized in that: The vehicle includes an airbag according to any one of claims 1 to 8 or an airbag device according to claim 9, preferably, the airbag device is a passenger airbag device, and / or the vehicle includes a display screen arranged on the dashboard and extending upward from the dashboard, and the airbag or the airbag device is installed in the dashboard in the longitudinal direction of the vehicle in front of the display screen in an area of ​​the dashboard facing the windshield.

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