Airbag apparatus, control method for airbag apparatus, and vehicle

Abstract

The present application discloses an airbag apparatus, a control method for an airbag apparatus, and a vehicle. The airbag apparatus comprises a first chamber, a second chamber, and a blocking piece assembly. A communication channel is provided between the first chamber and the second chamber. The blocking piece assembly is located in the first chamber, and comprises a blocking piece body and a pull strap assembly connected to the blocking piece body. In a first operation mode, the pull strap assembly is released; the blocking piece body blocks the communication channel; the first chamber is separated from the second chamber; and only the first chamber is opened. In a second operation mode, the pull strap assembly is fixed; the pull strap assembly applies tension to the blocking piece body; at least part of the blocking piece body deviates from the communication channel; and the first chamber and the second chamber are in communication and both are opened.

Description

Airbag device, airbag device control method, and vehicle Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an airbag device, a control method of the airbag device, and a vehicle. Background Art

[0002] Cars are usually equipped with airbags. When the car collides, the airbags will immediately inflate and expand to protect the occupants in the seats.

[0003] In some vehicles, seats offer passengers a variety of seating positions to provide a more comfortable ride. Depending on the seating position, the distance between the passenger and the airbag may vary, sometimes even farther. In these situations, airbags are typically equipped with drawstrings, which allow the airbag to have different volumes after inflation to accommodate the varying distances between the passenger and the airbag. For example, in a first scenario where the distance between the passenger and the airbag is small, the drawstring is tightened during inflation to constrain the airbag to a smaller, first, expanded volume. In a second scenario where the distance between the passenger and the airbag is larger, the drawstring is loosened or severed during inflation, allowing the airbag to expand to a larger, second, unconstrained volume. However, in this first scenario, the drawstring may be severed due to excessive air pressure within the airbag, causing the airbag to overinflate and potentially injure the passenger. Summary of the Invention

[0004] In response to the above technical problems, the first aspect of the present application proposes an airbag device. The airbag device includes a first chamber, a second chamber outside the first chamber, and a baffle assembly. A connecting passage is provided between the first chamber and the second chamber. The baffle assembly is located in the first chamber and includes a baffle body and a drawstring assembly; the first end of the drawstring assembly is connected to the baffle body, and the second end is suitable for being released or fixed so that the baffle body is suitable for blocking or opening the connecting passage. In a first operating mode, the second end of the drawstring assembly is released, and the baffle body blocks the connecting passage; the first chamber and the second chamber are separated, and only the first chamber is opened; in a second operating mode, the second end of the drawstring assembly is fixed; the baffle body is pulled by the drawstring assembly, and at least part of the baffle body deviates from the connecting passage, and the connecting passage is opened; the first chamber and the second chamber are connected and both are opened.

[0005] In one embodiment, the airbag device further includes: an airbag body, which defines an inflation space; and at least one separator, which is located in the inflation space and connected to the airbag body to separate the inflation space into a first chamber and a second chamber; a first interface serving as a connecting channel is constructed on the separator.

[0006] In one embodiment, the airbag body includes a first airbag for forming a first chamber and a second airbag for forming a second chamber; the first airbag includes an installation area serving as a separator; the second airbag is constructed with at least one second interface; the second airbag is outside the first airbag and is installed on the installation area, and the second interface is docked with the first interface.

[0007] In one embodiment, the first interface is within range of the second interface.

[0008] In one embodiment, the airbag body is integral; the airbag body and the separator are formed separately and then assembled together.

[0009] In one embodiment, the airbag device further comprises a first connecting structure, wherein the first interface is within a range defined by the first connecting structure; in a first operating mode, the first connecting structure remains intact to connect the baffle body to the separator; in a second operating mode, the first connecting structure is destroyed, and at least a portion of the baffle body leaves the separator and deviates from the first interface.

[0010] In one embodiment, the first connection structure is disposed along an edge of the first interface.

[0011] In one embodiment, the airbag device further comprises a second connecting structure adapted to connect the wall of the second chamber and the separator together; in a first operating mode, the second connecting structure remains intact and connects the wall of the second chamber and the separator together; in a second operating mode, the second connecting structure is destroyed to open the first chamber and the second chamber.

[0012] In one embodiment, the second connecting structure is further adapted to connect the wall of the second chamber and the baffle body to the partition; and in a first operating mode, the second connecting structure remains intact and the wall of the second chamber and the baffle body are connected to the partition, and in a second operating mode, the second connecting structure is destroyed so that at least a portion of the baffle body deviates from the connecting passage, and the first chamber and the second chamber are opened.

[0013] In one embodiment, the airbag device further comprises a third connecting structure offset from the first interface, wherein in the first operating mode and the second operating mode, the third connecting structure remains intact and connects the baffle body and the separator together.

[0014] In one embodiment, the baffle body includes a first edge portion and a second edge portion opposite to the first edge portion; the third connecting structure is provided along the first edge portion; and the first end of the drawstring assembly is connected to the second edge portion.

[0015] In one embodiment, the third connecting structure is arranged in the middle of the baffle body to divide the baffle body into two sub-sheets; the number of first interfaces is at least two and corresponds to the two sub-sheets respectively; the pull belt assembly includes two first ends, and the two first ends are respectively connected to the two sub-sheets.

[0016] In one embodiment, the elongation of the blocking piece body is equal to the elongation of the separating piece.

[0017] In one embodiment, the airbag device further comprises an activation mechanism, wherein the second end of the drawstring assembly is adapted to be connected to the activation mechanism. In a first operating mode, the activation mechanism is actuated to release the second end of the drawstring assembly; in a second operating mode, the activation mechanism is not actuated to secure the second end of the drawstring assembly.

[0018] In one embodiment, the drawstring assembly includes: a first drawstring connected to the baffle body; and a second drawstring, a first end of the second drawstring connected to the first drawstring and a second end connected to the activation mechanism.

[0019] In one embodiment, the drawstring assembly includes a plurality of first drawstrings; and a first end of the second drawstring is connected to the plurality of first drawstrings.

[0020] In one embodiment, the airbag device further comprises two gas generators; wherein, in the first operating mode, one gas generator inflates the airbag body; and in the second operating mode, two gas generators inflate the airbag body.

[0021] The second aspect of the present application proposes a control method for an airbag device. The airbag device includes a first chamber, a second chamber outside the first chamber, and a baffle assembly; a connecting passage is provided between the first chamber and the second chamber; the baffle assembly is located in the first chamber and includes a baffle body and a drawstring assembly; the first end of the drawstring assembly is connected to the baffle body, and the second end is suitable for being released or fixed. The control method includes: obtaining the distance between the occupant and the airbag device; determining whether the distance is greater than a preset distance; if not, the second end of the drawstring assembly is released, and the baffle body blocks the connecting passage; the first chamber and the second chamber are separated, and only the first chamber is opened; if so, the second end of the drawstring assembly is fixed, and the baffle body is pulled by the drawstring assembly so that at least a portion of the baffle body deviates from the connecting passage, and the connecting passage is open; the first chamber and the second chamber are connected and both are opened.

[0022] A third aspect of the present application provides a vehicle, which includes the airbag device described above.

[0023] The present application has the following beneficial effects: According to the airbag device of the present application, the flap assembly can selectively disconnect or connect the first and second chambers, thereby enabling expansion of only the first chamber or both the first and second chambers depending on the distance between the occupant and the airbag device. This allows the airbag device to protect occupants at varying distances from the device. Furthermore, in the airbag device of the present application, when the distance between the occupant and the airbag device is relatively small (i.e., in the first operating mode), the flap assembly blocks the communication passage from within the first chamber. The greater the air pressure in the first airbag, the more tightly the flap assembly blocks the communication passage, preventing gas from leaking from the first chamber into the second chamber. This helps prevent both the first and second chambers from inflating and expanding in the first operating mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described in the following detailed description by means of non-limiting examples of typical embodiments of the present invention, based on a number of accompanying drawings, which are not drawn to scale.

[0025] FIG1 schematically shows a vehicle according to an embodiment of the present application.

[0026] FIG2 schematically shows an airbag device according to an embodiment of the present application.

[0027] FIG. 3 a schematically shows the airbag body of the first embodiment, wherein the airbag body is expanded and has a second expanded volume.

[0028] FIG3 b schematically shows the structure of the airbag body of the second embodiment.

[0029] FIG. 4 schematically shows an exploded view of the airbag body shown in FIG. 3 a .

[0030] FIG. 5 schematically shows a baffle assembly according to an embodiment, wherein the second pull strap is omitted.

[0031] FIG. 6 a schematically shows the arrangement of the baffle assembly in the airbag device of the first embodiment.

[0032] FIG. 6 b schematically shows the arrangement of the baffle assembly in the airbag device of the second embodiment.

[0033] FIG. 6 c schematically shows the arrangement of the baffle assembly in the airbag device of the third embodiment.

[0034] FIG. 7 schematically shows the arrangement of a baffle assembly in an airbag device in another embodiment.

[0035] FIG8 schematically shows a cutout diagram of a first air bag, showing a baffle assembly.

[0036] FIG. 9 schematically shows a cutout diagram of a second air bag.

[0037] FIG. 10 schematically shows an airbag device according to the first embodiment, wherein the airbag body has a first expanded volume.

[0038] FIG. 11 schematically shows the airbag device of the first embodiment, wherein the airbag body has a second expanded volume.

[0039] FIG. 12 schematically shows an airbag device according to a second embodiment, wherein the airbag body has a first expanded volume.

[0040] FIG. 13 schematically shows an airbag device according to a second embodiment, wherein the airbag body has a second expanded volume.

[0041] FIG. 14 schematically shows an airbag device according to a third embodiment, wherein the airbag body has a first expanded volume.

[0042] FIG. 15 schematically shows an airbag device according to a third embodiment, wherein the airbag body has a second expanded volume.

[0043] FIG. 16 schematically shows an airbag device according to a fourth embodiment, wherein the airbag body has a first expanded volume.

[0044] FIG. 17 schematically shows an airbag device according to a fourth embodiment, wherein the airbag body has a second expanded volume.

[0045] FIG18 schematically shows an airbag device according to a fifth embodiment, wherein the airbag body has a first expanded volume.

[0046] FIG. 19 schematically shows an airbag device according to a fifth embodiment, wherein the airbag body has a second expanded volume.

[0047] FIG20 schematically shows a flow chart of a control method for an airbag device.

[0048] FIG. 21 schematically shows the expanded state of the airbag body when the distance between the occupant and the airbag device is small.

[0049] FIG22 schematically shows the expanded state of the airbag body when the distance between the occupant and the airbag device is large.

[0050] LIST OF REFERENCE NUMERALS 1 Vehicle 10 Seat 11 Instrument panel assembly 12 Occupant 2 Airbag device 201 First chamber 202 Second chamber 3 Airbag body 301 First connecting structure 302 Second connecting structure 303 Third connecting structure 304 Fourth connecting structure 305 Fifth connecting mechanism 31 First airbag 310 Separator 311 First interface 313 Air inlet 314 Edge portion 317 First main panel 318 First side panel 32 Second airbag 321 Second interface 327 Second main panel 328 Second side panel 4 Carrying assembly 410 Shell 411 Bottom wall 420 Gas generator 430 Activation mechanism 5 Baffle assembly 51 Baffle body 511 First edge portion 512 Second edge portion 513 Sub-panel 52 Strap assembly 521 First end 522 Second end 523 First strap 524 Second strap DETAILED DESCRIPTION

[0051] The details described herein are exemplary and are only used to illustrate the embodiments of the present application. They are intended to provide what is believed to be the most useful and understandable description of the principles and concepts of the present application. In this regard, no attempt is made to introduce the structural details of the present application beyond the level required for a basic understanding of the present application. Those skilled in the art can clearly understand how to implement the various forms of the present application in practice through the description and the drawings.

[0052] Figure 1 schematically shows a vehicle 1 according to an embodiment of the present application. As shown in Figure 1, the vehicle 1 includes a seat 10 and a dashboard assembly 11 adjacent to the seat 10. An airbag device 2 is provided in the dashboard assembly 11. When the vehicle 1 collides, the airbag body 3 of the airbag device 2 will inflate, expand, and pop out from the dashboard assembly 11 to protect the occupant 12 (as shown in Figures 21 and 22). It should be understood that the airbag device 2 can also be installed in other locations in the vehicle 1, such as a steering wheel, etc. For simplicity, in this application, the technical solution of the present application is described by taking the airbag device 2 provided in the dashboard assembly 11 as an example.

[0053] Next, the airbag device 2 will be described.

[0054] The airbag device 2 includes an airbag body 3 , a separator 310 connected to the airbag body 3 , and a blocking piece assembly 5 matched with the separator 310 .

[0055] Figures 3a and 4 illustrate the airbag body 3 of the first embodiment. The airbag body 3 includes a first airbag 31 and a second airbag 32 positioned outside the first airbag 31. The first airbag 31 defines a first chamber 201, and the second airbag 32 defines a second chamber 202. Specifically, as shown in Figure 4, the first airbag 31 includes a mounting area that serves as a separator 310, and the second airbag 32 is mounted on the separator 310 (or, the first airbag 31).

[0056] The separator 310 is provided with a first interface 311, and the second air bag 32 is provided with a second interface 321. After the second air bag 32 is mounted on the separator 310, the second interface 321 and the first interface 311 are connected, and the first interface 311 forms a communication channel between the first air bag 31 and the second air bag 32.

[0057] Figure 3b schematically illustrates the structure of the airbag body 3 of the second embodiment. As shown in Figure 3b, the airbag device 2 includes the airbag body 3 and a separator 310. The airbag body 3 is a one-piece component that defines an inflation space. The separator 310 is located within the inflation space and is connected to the airbag body 3 to separate the inflation space into a first chamber 201 and a second chamber 202. In this case, the separator 310 is configured with a first interface 311 that serves as a communication channel. Overall, the airbag body 3 and separator 310 are formed separately and then assembled together.

[0058] As shown in Figure 5, the baffle assembly 5 includes a baffle body 51 and a drawstring assembly 52. ​​In the initial state (i.e., when the airbag device 2 is installed and not in use), the baffle body 51 is positioned on the separator 310 and blocks the first interface 311. The drawstring assembly 52 has a first end 521 connected to the baffle body 51, and a second end 522 adapted to be released or secured, thereby enabling the baffle body 51 to block or open the first interface 311 (i.e., the aforementioned communication passage).

[0059] The airbag device 2 of the present application has a first operating mode. As shown in Figure 21, when the distance between the occupant 12 and the airbag device 2 is small (for example, the seat back is tilted at a small angle relative to the ground, resulting in a small distance between the occupant and the airbag device 2), the airbag device 2 is in the first operating mode. In this first operating mode, when the vehicle 1 is involved in a collision, the second end 522 of the drawstring assembly is released, allowing the drawstring assembly 52 to remain free within the first airbag 31 and not exerting tension on the baffle body 51. In this way, the baffle body 51 is connected to the separator 310 and blocks the first interface 311, separating the first airbag 31 from the second airbag 32. The first airbag 31 is inflated, and gas cannot flow from the first airbag 31 into the second airbag 32. Overall, only the first airbag 31 is expanded, resulting in a smaller first expansion volume for the airbag body 3, thereby providing protection for the occupant. Moreover, during this process, the greater the air pressure in the first air bag 31, the better the blocking effect of the baffle body 51 on the first interface 311, and the less likely the gas is to enter the second air bag 32 from the first air bag 31, thereby effectively avoiding excessive expansion of the air bag body 3.

[0060] The airbag device 2 of the present application also has a second operating mode. As shown in FIG. 22 , when the distance between the occupant 12 (shown in dashed lines) and the airbag device 2 is greater than that shown in solid lines (for example, the seat back is tilted at a greater angle relative to the ground, resulting in a greater distance between the occupant 12 and the airbag device 2), the airbag device 2 is in the second operating mode. In this second operating mode, when the vehicle 1 is involved in a collision, the second end 522 of the drawstring assembly 52 is fixed. As the first airbag 31 inflates and expands, the drawstring assembly 52 gradually tightens, pulling at least a portion of the barrier body 51 away from the separator 310 and away from the first port 311. The gas inflated into the first airbag 31 enters the second airbag 32 through the first port 311 (i.e., the communication channel). Overall, both the first and second airbags 31 and 32 expand, resulting in the airbag body 3 having a second expanded volume that is larger than the first expanded volume, thereby providing protection for the occupants. Moreover, during this process, the greater the air pressure in the first airbag 31 , the greater the pulling force of the pulling assembly 52 on the baffle body 51 , and the easier it is to pull at least a portion of the baffle body 51 off the first airbag 31 to open the communication channel.

[0061] As can be seen, according to the airbag device 2 of the present application, when a vehicle 1 crashes, the flap assembly 5 allows the first airbag 31 (i.e., the first chamber) and the second airbag 32 (i.e., the second chamber) to communicate or disconnect based on the distance between the occupant 12 and the airbag device 2. Consequently, the volume of the airbag body 3 after deployment also varies based on the distance between the occupant 12 and the airbag device 2, providing protection for occupants at different distances from the airbag device 2 (or instrument panel assembly 11), as well as for occupants seated at different angles. It should be noted that the size of the first deployed volume and the second deployed volume can be determined based on actual circumstances and will not be further elaborated here.

[0062] In one embodiment, as shown in Figure 4 , the area of ​​the second interface 321 of the second air bag 32 is larger than the area of ​​the first interface 311 of the first air bag 31. Thus, when the second air bag 32 is attached to the separator 310, the first interface 311 is within the area of ​​the second interface 321. This helps prevent gas within the first air bag 31 from leaking out of the air bag body 3 during the second operating mode. In one embodiment, the shape of the first interface 311 can be any suitable shape, such as circular, elliptical, or polygonal, without limitation. The same applies to the second interface 321.

[0063] In one embodiment, as shown in FIG2 , the airbag device 2 further includes a supporting assembly 4 for supporting the airbag body 3. In one embodiment, the supporting assembly 4 includes a shell 410 and two gas generators 420 mounted on the shell 410. The airbag body 3 is folded and disposed within the shell 410. Two air inlets 313 (as shown in FIG8 ) are configured on the first airbag 31 to connect the two gas generators 420 to the first airbag 31, so as to facilitate inflating the airbag body 3 using the gas generators 420. In one embodiment, in a first operating mode, only one gas generator 420 inflates the airbag body 3; in a second operating mode, both gas generators 420 inflate the airbag body 3 simultaneously. It should be understood that other numbers of gas generators 420 may also be provided, and the type of gas generator 420 is not limited and will not be described in detail here.

[0064] Optionally, as also shown in Figure 2, the support assembly 4 further includes an activation mechanism 430 disposed on the bottom wall 411 of the housing 410. The activation mechanism 430 is connected to the second end 522 of the drawstring assembly 52. ​​In a first operating mode, the activation mechanism 430 is actuated to release the second end 522 of the drawstring assembly 52, causing the baffle body 51 to block the first interface 31 and the communication channel to be closed. In a second operating mode, the activation mechanism 430 is not actuated to fix the second end 522 of the drawstring assembly 52, causing at least a portion of the baffle body 51 to be pulled off the first air bag 31 by the drawstring assembly 52 and deviate from the first interface 31, thereby opening the communication channel. The activation mechanism 430 is well known to those skilled in the art and will not be described in detail here. It should be understood that the activation mechanism 430 may also be disposed at other locations in the housing 410 according to actual circumstances.

[0065] Next, an airbag device according to a first embodiment will be described.

[0066] The airbag assembly is equipped with the airbag body of the first embodiment. As shown in FIG6a , the baffle body 51 is generally rectangular. In the initial state and first operating mode of the airbag assembly, the first connecting structure 301 secures the baffle body 51 to the separator 310 and blocks the first interface 311. In the second operating mode, the first connecting structure 301 is broken, causing the baffle assembly 51 to deviate from the first interface 311 (this will be described in detail below). It should be noted that the baffle body 51 may also have other suitable shapes, such as circular, elliptical, or other polygonal shapes, which are not limited here. The shape of the first interface 311 is also not limited in this application.

[0067] As also shown in Figure 6a, the first connecting structure 301 is positioned around the edge of the first interface 311, ensuring that the barrier body 51 blocks the first interface 311. Furthermore, during the manufacture of the airbag body 3, the first interface 311 provides a standard for alignment of the first connecting structure 301, facilitating the manufacture of the airbag body 3. It should be understood that, depending on practical circumstances, an appropriate gap may be provided between the first connecting structure 301 and the edge of the first interface 311, and this is not a limitation here. In other embodiments, the first connecting structure 301 may be positioned in any other direction, as long as it deviates from the first interface 311. This will not be discussed further here.

[0068] The first connecting structure 301 is a suture-stitched structure, i.e., the barrier assembly 5 is sewn to the separator 310 via sutures. In other embodiments, the first connecting structure 301 may also be an adhesive or welded structure. For convenience, this application describes the first connecting structure 301 as a suture-stitched structure.

[0069] The second airbag 32 is fixedly connected to the first airbag 31 via a fourth connecting structure 304. For example, the fourth connecting structure 304 is positioned substantially along the second interface 321, and the first connecting structure 301 is within the range defined by the fourth connecting structure 304. In both the first and second operating modes, the fourth connecting structure 304 remains intact, stably connecting the second airbag 32 to the first airbag 31. The fourth connecting structure 304 is similar in form to the first connecting structure 301 and will not be further described here.

[0070] As also shown in Figures 6a and 10, the airbag device 2 further includes a second connecting structure 302. In the initial state and first operating mode of the airbag device, the second airbag 32 is folded and connected to the separator 310 (or the first airbag 31) via the second connecting structure 302 to pre-secure the second airbag 32. The second connecting structure 302 also secures the baffle body 51 to the separator 310 (or the first airbag 31). In one embodiment, the second connecting structure 302 is positioned between the first connecting structure 301 and the fourth connecting structure 304. Thus, the second connecting structure 302 secures both the second airbag 32 and the baffle body 51 to the separator 310 (as shown in Figure 10). During transportation or assembly of the airbag device 2, the second airbag 32 is secured in its neatly folded state by the second connecting structure 302, preventing it from falling apart. This facilitates transportation and assembly by the operator. It should be understood that in the first operating mode, the second connecting structure 302 remains intact; however, in the second operating mode, the second connecting structure 302 is destroyed, and both the first airbag 31 and the second airbag 32 are expanded.

[0071] In one embodiment, the second connection structure 302 is also a suture structure, and the suture sews the second air bag 32 and the baffle body 51 to the first air bag 31. Of course, the second connection structure 302 can also be a bonding structure or a welding structure, which will not be repeated here.

[0072] In one embodiment, the connection strength of the second connection structure 302 is less than or equal to the connection strength of the first connection structure 301, so as to ensure that when the first connection structure 301 is destroyed, the second connection structure 302 is also destroyed. Of course, the connection strength of the second connection structure 302 may also be greater than the connection strength of the first connection structure 301, as long as the first connection structure 301 and the second connection structure 302 are both destroyed in the second operating mode.

[0073] As also shown in Figures 6a, 10, and 11, the strap assembly 52 includes a first strap 523 and a second strap 524 connected to the first strap 523. The first strap 523 is connected to the flap body 51, for example, at a corner of the flap body 51 (thus, the end of the first strap 523 connected to the flap body 51 forms the first end 521 of the strap assembly 52). The first end of the second strap 524 is connected to the first strap 523, and the second end is connected to the activation mechanism 430. The second end of the second strap 524 is controlled by the activation mechanism 430 to be fixed or released (thus, the second end of the second strap 524 forms the second end 522 of the strap assembly 52). Generally, the activation mechanism 430 has specific requirements for the straps assembled thereto. According to the solution of the present application, it is only necessary to select the second strap 524 to be compatible with the activation mechanism 430, which facilitates the manufacture of the airbag device 2. Of course, the first pull strap 523 may also be directly connected to the activation mechanism 430 according to actual conditions, so that the second pull strap 524 is not required.

[0074] In the first operating mode, as shown in FIG10 , the activation mechanism 430 is actuated to release the second end 522 of the drawstring assembly 52, so that the drawstring assembly 52 (i.e., the first drawstring 523 and the second drawstring 524) is free in the first airbag 31, no tension is applied to the baffle body 51, and the first connection structure 301 and the second connection structure 302 are not damaged. The baffle body 51 is connected to the separator 310 and blocks the first interface 311. The gas generator 420 inflates the first airbag 31, and the gas cannot flow from the first airbag 31 into the second airbag 32. Overall, only the first airbag 31 is opened, so that the airbag body 3 has a first open volume.

[0075] In the second operating mode, as shown in Figure 11, the activation mechanism 430 is not actuated and the second end 522 of the drawstring assembly 52 is fixed. The gas generator 420 inflates the first airbag 31. As the first airbag 31 inflates and opens, the drawstring assembly 52 gradually tightens and applies tension to the baffle body 51, destroying the first connecting structure 301 and the second connecting structure 302, thereby pulling the baffle body 51 off the separator 310 and connecting the first interface 311. The first interface 311 in the first airbag 31 leads to the second airbag 32. Overall, the first airbag 31 and the second airbag 32 are both opened, so that the airbag body 3 has a second open volume.

[0076] In one embodiment, the elongation of the barrier body 51 is the same as that of the separator 310 (or the first air bag 31). This facilitates the removal of the barrier body 51 from the separator 310 (or the first air bag 31) in the second operating mode. In one embodiment, the barrier body 51 and the separator 310 (or the first air bag 31) are made of the same material (e.g., nylon or polyester fabric). It should be understood that the elongation of the barrier body 51 and the separator 310 being the same does not necessarily mean they are mathematically identical; in practice, a slight difference between the two is acceptable, as long as it does not affect the ability to quickly remove the barrier body 51 from the separator 310.

[0077] Next, an airbag device according to a second embodiment will be described.

[0078] The airbag device of the second embodiment is equipped with the airbag body of the first embodiment and is similar to the airbag device of the first embodiment. The main differences between the two are described below. As shown in Figure 6b, the airbag device 2 also includes a third connecting structure 303, which is also used to connect the baffle body 51 and the separator 310. The third connecting structure 303 is located in the middle of the baffle body 51 and deviates from the first interface 311 and the first connecting structure 301. Overall, the baffle body 51 includes two sub-pieces 513 on either side of the third connecting structure 303. In this case, there are two first drawstrings 523, and the two first drawstrings 523 are respectively connected to the corresponding sub-pieces 513.

[0079] The third connection structure 303 is similar to the first connection structure 301 , and may be, for example, a suture structure, but the connection strength of the third connection structure 303 is greater than that of the first connection structure 301 .

[0080] As shown in FIG6b , there are six first interfaces 311 evenly distributed on both sides of the third connection structure 303. Each sub-piece 513 is adapted to cover or deviate from three corresponding first interfaces 311. Of course, other numbers of first interfaces 311 may also be provided, which will not be described in detail here.

[0081] In the first operating mode, as shown in Figure 12, the activation mechanism 430 is actuated and releases the second end 522 of the drawstring assembly 52. ​​The drawstring assembly 52 is in a free state within the first air bag 31, and the first connecting structure 301, the second connecting structure 302, and the third connecting structure 303 are not damaged. The baffle body 51 is connected to the separator 310 and blocks the first interface 311. The gas generator 420 inflates the first air bag 31, and the gas cannot flow from the first air bag 31 to the second air bag 32. Ultimately, only the first air bag 31 is opened, so that the air bag body 3 has a first open volume.

[0082] In the second operating mode, as shown in Figure 13, the activation mechanism 430 is not activated and the second end 522 of the drawstring assembly 52 is fixed. The gas generator 420 inflates the first air bag 31. As the first air bag 31 inflates and opens, the drawstring assembly 52 applies tension to the baffle body 51 and destroys the first connecting structure 301 and the second connecting structure 302. However, the third connecting structure 303 is not destroyed and still connects the baffle body 51 to the separator 310. In this way, the two sub-pieces 513 deviate from the corresponding first interface 311, making the first interface 311 conductive. The gas in the first air bag 31 enters the second air bag 32 through the first interface 311. Ultimately, the first air bag 31 and the second air bag 32 are both opened, so that the air bag body 3 has a second open volume.

[0083] In addition, in the second operation mode, the third connection structure 303 and the pull belt assembly 52 constrain the baffle body 51 to prevent the baffle body 51 from freely moving in the first air bag 31 and blocking the first interface 311 .

[0084] Next, an airbag device according to a third embodiment will be described.

[0085] The airbag device of the third embodiment is equipped with the airbag body of the first embodiment and is similar to the airbag device of the second embodiment. The following focuses on the differences between the two. As shown in Figure 6c, the flap body 51 includes a first edge portion 511 and a second edge portion 512 opposite the first edge portion 511. For example, the flap body 51 is rectangular in shape, with the first edge portion 511 and the second edge portion 512 being the two opposing edges of the rectangle. The third connecting structure 303 is disposed adjacent to the second edge portion 512 of the flap body 51 and offset from the first interface 311 and the first connecting structure 301. The drawstring assembly 52 includes only a first drawstring 523, with both ends of the first drawstring 523 connected to the first edge portion 511 and the activation mechanism 430, respectively (i.e., the first end 521 of the drawstring assembly 52 is connected to the first edge portion 511, and the second end 522 is connected to the activation mechanism 430).

[0086] In the first operating mode, as shown in Figure 14, the activation mechanism 430 is actuated to release the second end 522 of the drawstring assembly 52. ​​The drawstring assembly 52 is in a free state within the first air bag 31, and the first connecting structure 301, the second connecting structure 302, and the third connecting structure 303 are not damaged. The baffle body 51 is connected to the separator 310 and blocks the first interface 311. The gas generator 420 inflates the first air bag 31, and the gas cannot flow from the first air bag 31 to the second air bag 32. Ultimately, only the first air bag 31 is opened, so that the air bag body 3 has a first open volume.

[0087] In the second operating mode, as shown in Figure 15, the activation mechanism 430 is not activated and the second end 522 of the drawstring assembly 52 is fixed. The gas generator 420 inflates the first airbag 31. As the first airbag 31 inflates and expands, the drawstring assembly 52 applies tension to the baffle body 51 and destroys the first connecting structure 301 and the second connecting structure 302. However, the third connecting structure 303 is not destroyed and still connects the baffle body 51 to the separator 310. In this way, the baffle body 51 deviates from the first interface 311, making the first interface 311 conductive. The gas in the first airbag 31 enters the second airbag 32 through the first interface 311. Ultimately, both the first airbag 31 and the second airbag 32 expand, so that the airbag body 3 has a second expanded volume.

[0088] Similar to the baffle assembly of the second embodiment, in the second operating mode, the third connecting structure 303 and the drawstring assembly 52 of the baffle assembly of the third embodiment constrain the baffle body 51 to prevent the baffle body 51 from moving freely in the first air bag 31 and blocking the first interface 311.

[0089] Next, an airbag device according to a fourth embodiment will be described.

[0090] The airbag device of the fourth embodiment is equipped with the airbag body of the first embodiment and is similar to the airbag device of the first embodiment. Only the differences between the two are described below. As shown in Figure 16 , in the initial state and first operating mode of the airbag device, the second airbag 32 is pre-connected to the separator 310 (or the first airbag 31) via the second connecting structure 302 after folding. It should be noted that the second connecting structure 302 is not connected to the barrier body 51.

[0091] In the first operating mode, as shown in Figure 16, the activation mechanism 430 is actuated to release the second end 522 of the drawstring assembly 52. ​​The drawstring assembly 52 is in a free state within the first air bag 31, and the first connecting structure 301 and the second connecting structure 302 are not damaged. The baffle body 51 is connected to the separator 310 and blocks the first interface 311. The gas generator 420 inflates the first air bag 31, and the gas cannot flow from the first air bag 31 into the second air bag 32. Ultimately, only the first air bag 31 is opened, so that the air bag body 3 has a first open volume.

[0092] In the second operating mode, as shown in Figure 17, the activation mechanism 430 is not actuated and the second end 522 of the drawstring assembly 52 is fixed. The gas generator 420 inflates the first airbag 31. As the first airbag 31 inflates and opens, the drawstring assembly 52 applies tension to the baffle body 51 and destroys the first connecting structure 301, thereby pulling the baffle body 51 off the separator 310, and the first interface 311 is connected. The gas in the first airbag 31 enters the second airbag 32 through the first interface 311, and the air pressure in the second airbag 32 increases, destroying the second connecting structure 302. Ultimately, the first airbag 31 and the second airbag 32 are both opened, so that the airbag body 3 has a second open volume.

[0093] Next, an airbag device according to a fifth embodiment will be described.

[0094] As shown in Figure 18, the airbag device of the fifth embodiment is equipped with the airbag body of the second embodiment. The airbag body 3 is an integrated component, and the separator 310 is located in the inflation space defined by the airbag body 3 as an independent component and is fixedly connected to the airbag body 3 through the fifth connecting structure 305. In this way, the separator 310 divides the inflation space into a first chamber 201 and a second chamber 202. The first interface 311 is constructed on the separator 310. It should be noted that in the first operating mode and the second operating mode, the fifth connecting structure 305 remains intact to stably connect the separator 310 to the first airbag 31. In addition, the fifth connecting structure 305 is similar in form to the first connecting structure 301 and will not be repeated here. The other structures of the airbag device of the fifth embodiment are similar to those of the airbag device of the second embodiment and will not be repeated here.

[0095] In the first operating mode, as shown in Figure 18, the activation mechanism 430 is actuated to release the second end 522 of the drawstring assembly 52, allowing the drawstring assembly 52 to be free within the first airbag 31. No tension is applied to the baffle body 51, and the first connecting structure 301, the second connecting structure 302, and the third connecting structure 303 are not damaged. The baffle body 51 is connected to the separator 310 and blocks the first interface 311. The gas generator 420 inflates the first airbag 31, preventing gas from flowing from the first airbag 31 into the second airbag 32. Overall, only the first airbag 31 is expanded, resulting in the airbag body 3 having a first expanded volume.

[0096] In the second operating mode, as shown in Figure 19, the activation mechanism 430 is not activated and the second end 522 of the drawstring assembly 52 is fixed. The gas generator 420 inflates the first air bag 31. As the first air bag 31 inflates and opens, the drawstring assembly 52 applies tension to the baffle body 51 and destroys the first connecting structure 301 and the second connecting structure 302. However, the third connecting structure 303 is not destroyed and still connects the baffle body 51 to the separator 310. In this way, the two sub-pieces 513 deviate from the corresponding first interface 311, making the first interface 311 conductive. The gas in the first air bag 31 enters the second air bag 32 through the first interface 311. Ultimately, the first air bag 31 and the second air bag 32 are both opened, so that the air bag body 3 has a second open volume.

[0097] It should also be understood that, in other embodiments, in the airbag device, only the first connecting structure 301 (see FIG. 6 a ) may be provided, wherein the first connecting structure 301 connects the baffle body 51 to the separator 310, or connects the baffle body 51 and the second airbag 32 to the separator 310 at the same time; only the second connecting structure 302 (as shown in FIG. 7 ) may be provided, wherein the second connecting structure 302 connects the baffle body 51 to the separator 310, or connects the baffle body 51 and the second airbag 32 to the separator 310 at the same time; or only the second connecting structure 302 and the third connecting structure 303 (see FIG. 6 b ) may be provided. 6c ), the third connecting structure 303 connects the baffle body 51 to the separator 310, and the second connecting structure 302 connects the baffle body 51 to the separator 310, or the baffle body 51 and the second airbag 32 are simultaneously connected to the separator 310. Alternatively, only the first connecting structure 301 and the third connecting structure 303 may be provided (see FIG. 6b and / or FIG. 6c ), with the third connecting structure 303 connecting the baffle body 51 to the separator 310, and the first connecting structure 301 connecting the baffle body 51 to the separator 310, or the baffle body 51 and the second airbag 32 are simultaneously connected to the separator 310. The operating processes of these airbag devices are similar to those of the airbag device of the first embodiment and will not be described in detail here.

[0098] The following describes a process for manufacturing the airbag body 3 of the airbag device of the second embodiment.

[0099] As shown in FIG5 , a baffle assembly 5 is provided. The baffle body 51 of the baffle assembly 5 is generally rectangular and has a first edge portion 511 and a second edge portion 512 that are opposite each other. The drawstring assembly 52 of the baffle assembly 5 includes two first drawstrings 523 and one second drawstring 524. One first drawstring 521 has its ends connected to the ends of the first edge portion 511 of the baffle body 51, while another first drawstring 521 is connected to the ends of the second edge portion 512 of the baffle body 51. The second drawstring 524 is connected to the two first drawstrings 523 (as shown in FIG6 b).

[0100] As shown in FIG8 , when manufacturing the first airbag 31, a first main panel 317 and two first side panels 318 are first provided. The first main panel 317 is generally strip-shaped (e.g., generally rectangular) and defines a mounting portion (i.e., a separator 310). The first main panel 317 also has edge portions 314 located on either side of the separator 310 along the length of the first main panel 317. Six first ports 311 are configured in the separator 310, and two air inlets 313 are configured in one edge portion 314. Next, a baffle body 51 is positioned on the inner side of the first main panel 317, corresponding to the separator 310, to cover the first ports 311. A first connecting structure 301 is provided along the edge of each first port 311, and a third connecting structure 303 is provided in the center of the baffle body 5. In this manner, the baffle body 51 is connected to the separator 310 via the first connecting structure 301 and the third connecting structure 303. The first edge portion 511 and the second edge portion 512 of the baffle body 51 are located on either side of the third connecting structure 303, and three first interfaces 311 are located on each side of the third connecting structure 303. Next, the two first side panels 318 are sewn to the two longitudinal edges (i.e., the length edges) of the first main panel 317, and the two width edges of the first main panel 317 are butt-stitched together, thereby forming the first air bag 31 as shown in FIG4 . The baffle assembly 5 is located within the first air bag 31. It should be noted that, for simplicity, the second drawstring 524 is not shown in FIG8 .

[0101] As shown in FIG9 , when manufacturing the second air bag 32, first, a second main sheet 327 and two second side sheets 328 are provided. The second main sheet 327 is generally strip-shaped (e.g., generally rectangular). The two second side sheets 328 are then sewn to the longitudinal edges of the second main sheet 327, while the width edges of the second main sheet 327 remain separate. This forms the second air bag 32 shown in FIG4 , which has a second port 321.

[0102] Next, the second airbag 32 is mounted on the separator 310 of the first airbag 31 through the fourth connecting structure 304, and the second interface 321 is docked with the first airbag 31. In this way, the airbag body 3 is manufactured.

[0103] Optionally, after the second air bag 32 is mounted on the first air bag 31, the second air bag 32 is folded. A second connecting structure 302 is then provided to pre-secure the second air bag 32 to the separator 310, thereby maintaining the second air bag 32 in the folded state. The second connecting structure 302 also connects the barrier body 51 to the separator 310.

[0104] It should be understood that the remaining manufacturing processes of the airbag body of the airbag device are similar to the processes described above and will not be repeated here.

[0105] Figure 20 schematically illustrates a flow chart of a method for controlling an airbag device. As previously described, the airbag device includes a first chamber, a second chamber located outside the first chamber, and a flap assembly. A communication passage is provided between the first and second chambers. The flap assembly is located within the first chamber and includes a flap body and a drawstring assembly. The drawstring assembly has a first end connected to the flap body and a second end adapted to be released or secured.

[0106] As also shown in FIG20 , the control method includes the following steps.

[0107] Step 1: Obtain the distance between the occupant 12 and the airbag device 2 .

[0108] Step 2: Determine whether the distance is greater than a preset distance.

[0109] In step 2, if the determination result is negative, it means that the distance between the occupant 12 and the airbag device 2 is relatively small. In the event of a collision, the control device of vehicle 1 commands the activation mechanism 430 to be actuated, releasing the second end 522 of the drawstring assembly 52 and instructing the gas generator 420 to generate gas to inflate the first airbag 31. The flap body 51 blocks the communication passage, preventing gas from flowing from the first airbag 31 to the second airbag 32. Ultimately, only the first airbag 31 expands, resulting in the airbag body 3 having a first expanded volume (as shown in FIG. 19 ).

[0110] In step 2, if the judgment result is yes, it means that the distance between the occupant 12 and the airbag device 2 is large. When the vehicle 1 collides, the control device of the vehicle 1 instructs the activation structure 430 not to be actuated to fix the second end 522 of the drawstring assembly 52, and instructs the gas generator 420 to inflate the first airbag 31. The drawstring assembly 52 is tightened and applies a pulling force to the baffle body 51 to pull at least a portion of the baffle body 51 away from the connecting channel. The gas in the first airbag 31 flows from the first airbag 31 into the second airbag 32 through the connecting channel. Ultimately, the first airbag 31 and the second airbag 32 are both expanded, so that the airbag body 3 has a second expanded volume (as shown in FIG. 20 ).

[0111] In one embodiment, a sensor is provided in the vehicle 1 to obtain the distance between the occupant 12 and the airbag device 2 in step 1. This can be easily implemented by those skilled in the art and will not be described in detail here.

[0112] In one embodiment, the control method may further include other steps prior to step one. For example, the step may include: obtaining the status of vehicle 1, and then determining whether vehicle 1 is about to collide. If not, returning to continue obtaining the status of vehicle 1. If so, further determining whether there is an occupant on seat 10. If it is determined that there is no occupant, the airbag device 2 is controlled to be inoperative. If it is determined that there is an occupant, the distance between the occupant 12 and the airbag device 2 is obtained (i.e., step one described above), and then proceeding to step two. It should be understood that these other steps are easily implemented by those skilled in the art and will not be described in detail here.

[0113] It should be noted that the present invention (e.g., the inventive concepts, etc.) has been described in the specification and / or illustrated in the drawings of this patent document based on exemplary embodiments; the embodiments of the present invention are presented by way of example only and are not intended to limit the scope of the present invention. The structure and / or arrangement of the elements of the inventive concepts embodied in the present invention as described in the specification and / or illustrated in the drawings is illustrative only. Although exemplary embodiments of the present invention have been described in detail in this patent document, those skilled in the art will readily appreciate that equivalents, modifications, variations, and the like 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 matter (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 modifications, variations, substitutions, equivalents, changes, omissions, and the like may be made in the configuration and / or arrangement of the exemplary embodiments (e.g., in terms of concept, design, structure, apparatus, form, assembly, construction, means, function, system, process / method, steps, order of process / method steps, operation, operating conditions, performance, materials, composition, combination, etc.). ) without departing from the scope of the present invention; all such subject matter (e.g., modifications, variations, 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 (e.g., details, structures, functions, materials, behaviors, steps, sequences, systems, results, etc.) described in the specification and / or drawings of this patent document. 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, variations, 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 exemplary embodiments, and not as a limitation on the scope of the present invention.

[0114] It should also be noted that, depending on the exemplary embodiments, the present invention may include conventional technologies (such as those 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 those 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 device, characterized in that: include: First chamber; a second chamber outside the first chamber, wherein a communication passage is provided between the first chamber and the second chamber; as well as a baffle assembly, the baffle assembly being located in the first chamber and comprising a baffle body and a drawstring assembly; a first end of the drawstring assembly being connected to the baffle body, and a second end being suitable for being released or fixed, so that the baffle body is suitable for blocking or conducting the communication channel; Wherein, in the first operation mode, the second end of the drawstring assembly is released, the blocking piece body blocks the communication channel; the first chamber and the second chamber are separated, and only the first chamber is opened; In the second operation mode, the second end of the drawstring assembly is fixed; the baffle body is pulled by the drawstring assembly, at least part of the baffle body deviates from the connecting passage, and the connecting passage is open; the first chamber and the second chamber are connected and both are open.

2. The airbag device according to claim 1, characterized in that: The airbag device further comprises: an airbag body defining an inflation space; and At least one separator is located in the inflation space and connected to the airbag body to separate the inflation space into the first chamber and the second chamber; a first interface serving as the communication channel is constructed on the separator.

3. The airbag device according to claim 2, characterized in that: The airbag body includes a first airbag for forming the first chamber and a second airbag for forming the second chamber; The first airbag includes a mounting area serving as the separator; the second airbag is configured with at least one second interface; the second airbag is located outside the first airbag and mounted on the mounting area, and the second interface is docked with the first interface.

4. The airbag device according to claim 3, characterized in that: The first interface is within the range of the second interface.

5. The airbag device according to claim 2, characterized in that: The airbag body is integral; the airbag body and the separator are formed separately and then assembled together.

6. The airbag device according to claim 2, characterized in that: The airbag device further comprises a first connection structure, the first interface is within a range defined by the first connection structure; in the first operation mode, the first connection structure remains intact to connect the baffle body to the separator; In the second operation mode, the first connection structure is broken, and at least a portion of the baffle body leaves the separator and deviates from the first interface.

7. The airbag device according to claim 6, characterized in that: The first connection structure is arranged along an edge of the first interface.

8. The airbag device according to claim 2, characterized in that: The airbag device also includes a second connecting structure, which is suitable for connecting the wall of the second chamber and the separator together; in the first operating mode, the second connecting structure remains intact and connects the wall of the second chamber and the separator together; in the second operating mode, the second connecting structure is destroyed to open the first chamber and the second chamber.

9. The airbag device according to claim 8, characterized in that: The second connection structure is also adapted to connect the wall of the second chamber and the baffle body to the separator; and in the first operating mode, the second connection structure remains intact and connects the wall of the second chamber and the baffle body to the separator; In the second operation mode, the second connection structure is broken so that at least a portion of the baffle body is deviated from the communication passage, and the first chamber and the second chamber are opened.

10. The airbag device according to claim 2, characterized in that: The airbag device further includes a third connection structure deviating from the first interface; In the first operation mode and the second operation mode, the third connection structure remains intact and connects the baffle body and the partition sheet together.

11. The airbag device according to claim 10, characterized in that: The baffle body includes a first edge portion and a second edge portion opposite to the first edge portion; The third connection structure is arranged along the first edge portion; and the first end of the drawstring assembly is connected to the second edge portion.

12. The airbag device according to claim 10, characterized in that: The third connection structure is arranged in the middle of the baffle body to divide the baffle body into two sub-pieces; the number of the first interfaces is at least two and they correspond to the two sub-pieces respectively; The drawstring assembly includes two first ends, and the two first ends are respectively connected to two sub-sheet bodies.

13. The airbag device according to claim 2, characterized in that: The elongation rate of the baffle body is equal to the elongation rate of the partition sheet.

14. The airbag device according to claim 1, characterized in that: The airbag device further comprises an activation mechanism, and the second end of the drawstring assembly is adapted to be connected to the activation mechanism; In the first operating mode, the activation mechanism is actuated to release the second end of the drawstring assembly; In the second operating mode, the activation mechanism is not actuated to secure the second end of the drawstring assembly.

15. The airbag device according to claim 14, characterized in that: The drawstring assembly comprises: A first drawstring connected to the baffle body; and A second drawstring, wherein a first end of the second drawstring is connected to the first drawstring, and a second end of the second drawstring is suitable for being connected to the activation mechanism.

16. The airbag device according to claim 15, characterized in that: The drawstring assembly includes a plurality of the first drawstrings; and a first end of the second drawstring is connected to the plurality of the first drawstrings.

17. The airbag device according to claim 2, characterized in that: The airbag device also includes two gas generators; wherein, in a first operating mode, one of the gas generators inflates the airbag body; In the second operating mode, both of the gas generators inflate the airbag body.

18. A method for controlling an airbag device, characterized in that: The airbag device comprises a first chamber, a second chamber outside the first chamber, and a baffle assembly; a communication passage is provided between the first chamber and the second chamber; the baffle assembly is located in the first chamber and comprises a baffle body and a drawstring assembly; a first end of the drawstring assembly is connected to the baffle body, and a second end is suitable for being released or fixed; The control method comprises: obtaining a distance between an occupant and the airbag device; Determine whether the distance is greater than a preset distance; if not, the second end of the drawstring assembly is released, and the baffle body blocks the connecting passage; the first chamber and the second chamber are separated, and only the first chamber is opened; if yes, the second end of the drawstring assembly is fixed, the baffle body is pulled by the drawstring assembly, and at least part of the baffle body deviates from the connecting passage, and the connecting passage is connected; the first chamber and the second chamber are connected and both are opened.

19. A vehicle, characterized in that: Comprising an airbag device according to any one of claims 1 to 17.

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