Far-side airbag and automobile seat

Abstract

A far-side airbag and an automobile seat (40). The far-side airbag comprises: a main cavity (10), an auxiliary cavity (20) and a gas generating device (30), wherein the main cavity (10) is fixedly mounted on the seat (40), and a gas outlet end of the gas generating device (30) is in communication with the main cavity (10) to inflate the main cavity (10); the auxiliary cavity (20) is fixedly connected to an occupant side of the main cavity (10) by means of a connecting portion (50), and the connecting portion (50) is provided with a first opening (51) for communicating the main cavity (10) with the auxiliary cavity (20); and the auxiliary cavity (20) is separated into a first auxiliary cavity (21) and a second auxiliary cavity (22) by means of a separator (23), the first auxiliary cavity (21) being located between the main cavity (10) and the second auxiliary cavity (22), and the separator (23) being provided with gas holes (231) for communicating the first auxiliary cavity (21) with the second auxiliary cavity (22); after inflation, both the first auxiliary cavity (21) and the second auxiliary cavity (22) protrude towards an occupant position, enabling the second auxiliary cavity (22) to support the occupant's head or neck.

Description

Remote airbag and car seat

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 7, 2024, with application number 202410264330.5 and invention name “A Remote Airbag and Car Seat”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of safety protection devices, and in particular to a distal airbag and a car seat. Background Art

[0003] Cars have become a common means of transportation in our lives. To protect the safety of passengers, cars are equipped with safety devices such as seat belts and airbags. Among them, airbags can be deployed in the event of an accident to prevent the human body from colliding with the vehicle structure, thereby protecting personal safety.

[0004] Remote airbags, a new type of airbag, are becoming increasingly common. They typically consist of two inflatable chambers of different sizes. During inflation, the larger chamber inflates first and protrudes from the car seat, while the smaller chamber inflates later and protrudes from the larger chamber. This restricts the occupant's head movement and reduces the risk of head injury.

[0005] However, in existing distal airbags, the small cavity for receiving the occupant's head or neck is directly connected to the larger cavity. Furthermore, to ensure that the inflated small cavity can contact the occupant's head or neck, the dimensions of the small and large cavities must be very large. When the small cavity receives the impact of the occupant's head or neck, the impact force is poorly dissipated, and the resulting reaction force can easily injure the occupant's head or neck, resulting in insufficient protection. Therefore, improving the protective strength of distal airbags has become a technical issue that needs to be addressed.

[0006] Summary of the Invention

[0007] The present application provides a distal airbag and a car seat to solve the problem of insufficient protection of existing distal airbags.

[0008] The embodiment of the present application provides a distal airbag, comprising: a main cavity, a secondary cavity, and a gas generating device;

[0009] The main cavity is fixedly mounted on the seat, and the gas outlet of the gas generating device is connected to the main cavity for inflating the main cavity; the secondary cavity is fixedly connected to the passenger side of the main cavity through a connecting portion, and the connecting portion is provided with a first opening connecting the main cavity and the secondary cavity;

[0010] The sub-cavity is divided into a first sub-cavity and a second sub-cavity by a partition plate. The first sub-cavity is located between the main cavity and the second sub-cavity. The partition plate is provided with air holes to connect the first sub-cavity and the second sub-cavity. After inflation, the first sub-cavity and the second sub-cavity both bulge toward the occupant position so that the second sub-cavity can support the occupant's head or neck.

[0011] Optionally, the first opening is configured as a one-way channel allowing the inflation airflow to flow from the main cavity to the secondary cavity.

[0012] Optionally, the first opening is configured as a one-way channel allowing the inflation airflow to flow from the main cavity to the sub-cavity, specifically: a baffle is provided at the first opening, and the baffle can movably cover the first opening; when the gas generating device inflates the main cavity, the gas in the main cavity pushes the baffle open and enters the sub-cavity; when the inflated sub-cavity is squeezed, the gas in the sub-cavity acts on the baffle to cause the baffle to close the first opening.

[0013] Optionally, the blocking piece includes a first blocking piece and a second blocking piece; when the first blocking piece and the second blocking piece cover the first opening, the first blocking piece and the second blocking piece have an overlapping portion.

[0014] Optionally, after the first sub-cavity is inflated, the cross-sectional area of ​​the first sub-cavity gradually decreases in the direction extending from the main cavity to the first sub-cavity.

[0015] Optionally, the number of air holes provided on the separator is one or more.

[0016] Optionally, when inflated, the protruding direction of the secondary cavity is perpendicular to the protruding direction of the main cavity.

[0017] Optionally, an air-guiding structure is provided in the main cavity, and the air-guiding structure includes a first channel and a second channel; the air outlets of the first channel and the second channel are separated by a preset distance, and the air inlets of the first channel and the second channel are respectively connected to the air outlet ends of the gas generating device.

[0018] Optionally, the inflated main cavity partially overlaps with the central channel of the vehicle.

[0019] The embodiment of the present application also provides a car seat, wherein a distal airbag is provided on the inner side of the seat frame of the car seat; the distal airbag includes: a main cavity, a secondary cavity and a gas generating device;

[0020] The main cavity is fixedly mounted on the seat, and the gas outlet of the gas generating device is connected to the main cavity for inflating the main cavity; the secondary cavity is fixedly connected to the passenger side of the main cavity through a connecting portion, and the connecting portion is provided with a first opening connecting the main cavity and the secondary cavity;

[0021] The sub-cavity is divided into a first sub-cavity and a second sub-cavity by a partition plate. The first sub-cavity is located between the main cavity and the second sub-cavity. The partition plate is provided with air holes to connect the first sub-cavity and the second sub-cavity. After inflation, the first sub-cavity and the second sub-cavity both bulge toward the occupant position so that the second sub-cavity can support the occupant's head or neck.

[0022] Compared with the prior art, this application has the following advantages:

[0023] An embodiment of the present application provides a distal airbag, comprising: a main cavity, a sub-cavity and a gas generating device; the main cavity is fixedly mounted on the seat, and the gas outlet end of the gas generating device is connected to the main cavity for inflating the main cavity; the sub-cavity is fixedly connected to the passenger side of the main cavity by a connecting portion, and the connecting portion is provided with an opening connecting the main cavity and the sub-cavity; the sub-cavity is divided into a first sub-cavity and a second sub-cavity by a partition plate, and the first sub-cavity is located between the main cavity and the second sub-cavity, and the partition plate is provided with an air hole to connect the first sub-cavity and the second sub-cavity; the first sub-cavity and the second sub-cavity both convex toward the passenger position after inflation, so that the second sub-cavity supports the head or neck of the passenger.

[0024] This distal airbag has a main cavity and a secondary cavity that are connected. The secondary cavity is divided into a first secondary cavity and a second secondary cavity by a partition. After inflation, both the first and second secondary cavities convex toward the occupant, giving the secondary cavity an elongated shape convex toward the occupant, thereby reducing the overall volume of the secondary cavity. Furthermore, the second secondary cavity is a structure for receiving the occupant's head or neck. In an accident, because the first secondary cavity is separated from the main cavity, when the second secondary cavity is impacted by the occupant's head or neck, the force applied to the second secondary cavity is first transferred to the first secondary cavity. The partition between the second and first secondary cavities bends, thereby relieving some of the impact force. The bending recovery process further relieves the force. Furthermore, the partial deformation of the first secondary cavity during the force transfer process also relieves the force, thereby reducing the magnitude of the generated reaction force, reducing the risk of injury to the occupant's head or neck, and enhancing the protective strength of the distal airbag.

[0025] In a preferred embodiment of the present application, the first opening is configured as a one-way passage that allows the inflation airflow to flow from the main cavity to the sub-cavity, thereby maintaining the air pressure in the sub-cavity unchanged after inflation is completed. When an accident occurs, since the gas in the sub-cavity cannot flow back to the main cavity, when the second sub-cavity is hit by the occupant's head or neck, the gas in the second sub-cavity and the first sub-cavity will only change its distribution within the second sub-cavity and the first sub-cavity. The bending recovery and deformation recovery process of the second sub-cavity and the first sub-cavity will be faster and the recovery effect will be more significant, thereby improving the force unloading effect of the sub-cavity and further improving the protection effect on the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram of the overall structure of a distal airbag provided in an embodiment of the present application.

[0027] FIG2 is a partial cross-sectional view of a distal airbag provided in an embodiment of the present application.

[0028] FIG3 is a cross-sectional view of the connection between the main cavity and the auxiliary cavity of a distal airbag provided in an embodiment of the present application;

[0029] FIG4 is a schematic structural diagram of a separator provided in an embodiment of the present application that divides a sub-cavity into a first sub-cavity and a second sub-cavity;

[0030] FIG5 is a schematic structural diagram of a first blocking piece and a second blocking piece in a connecting portion provided by an embodiment of the present application when they are pushed apart by gas.

[0031] Reference numerals: main cavity 10 ; sub-cavity 20 ; first sub-cavity 21 ; second sub-cavity 22 ; partition 23 ; air hole 231 ; gas generating device 30 ; seat 40 ; connecting portion 50 ; first opening 51 ; baffle 52 ; first baffle 521 ; second baffle 522 ; air guide structure 60 ; central channel 70 . DETAILED DESCRIPTION

[0032] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of the present application. Therefore, the present application is not limited to the specific implementations disclosed below.

[0033] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0035] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," "set," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] Cars have become a common means of transportation in our lives. To protect the safety of passengers, cars are equipped with safety devices such as seat belts and airbags. Among them, airbags can be deployed in the event of an accident to prevent the human body from colliding with the vehicle structure, thereby protecting personal safety.

[0037] Remote airbags, a new type of airbag, are becoming increasingly common. They typically consist of two inflatable chambers of different sizes. During inflation, the larger chamber inflates first and protrudes from the car seat, while the smaller chamber inflates later and protrudes from the larger chamber. This restricts the occupant's head movement and reduces the risk of head injury.

[0038] However, in existing distal airbags, the small cavity for receiving the occupant's head or neck is directly connected to the larger cavity. Furthermore, to ensure that the inflated small cavity can contact the occupant's head or neck, the dimensions of the small and large cavities must be very large. When the small cavity receives the impact of the occupant's head or neck, the impact force is poorly dissipated, and the resulting reaction force can easily injure the occupant's head or neck, resulting in insufficient protection. Therefore, improving the protective strength of distal airbags has become a technical issue that needs to be addressed.

[0039] To address the aforementioned problem of insufficient protection provided by existing distal airbags, the present application provides a feasible distal airbag in which a main cavity and a secondary cavity are connected, the secondary cavity being separated by a partition into a first secondary cavity and a second secondary cavity. After inflation, both the first secondary cavity and the second secondary cavity bulge toward the occupant, giving the secondary cavity an overall elongated shape bulging toward the occupant, thereby reducing the overall volume of the secondary cavity. In addition, the second sub-cavity is a structure for supporting the head or neck of the occupant. When an accident occurs, since the first sub-cavity is separated from the second sub-cavity and the main cavity, when the second sub-cavity is hit by the head or neck of the occupant, the force borne by the second sub-cavity will be transferred to the first sub-cavity first, and the partition between the second sub-cavity and the first sub-cavity will bend, thereby unloading part of the impact force, and the bending recovery process will unload the force again, and the first sub-cavity will partially deform during the force transmission process, which will also produce a force unloading effect, thereby reducing the magnitude of the reaction force generated, reducing the risk of injury to the occupant's head or neck, and improving the protection of the distal airbag.

[0040] The distal airbag is specifically shown in Figures 1, 2, and 3. Figure 1 is a schematic diagram of the overall structure of a distal airbag provided in an embodiment of the present application. Figure 2 is a partial cross-sectional view of a distal airbag provided in an embodiment of the present application. Figure 3 is a cross-sectional view of the connection between the main cavity and the auxiliary cavity of a distal airbag provided in an embodiment of the present application. As shown in Figure 1, the distal airbag includes: a main cavity 10, an auxiliary cavity 20, and a gas generating device 30.

[0041] Among them, the main cavity 10 is fixedly installed on the seat 40, and the gas outlet end of the gas generating device 30 is connected to the main cavity 10 for inflating the main cavity 10; the sub-cavity 20 is fixedly connected to the passenger side of the main cavity 10 through the connecting part 50, and the connecting part 50 is provided with a first opening 51 connecting the main cavity 10 and the sub-cavity 20; the sub-cavity 20 is divided into a first sub-cavity 21 and a second sub-cavity 22 by a partition 23, and the first sub-cavity 21 is located between the main cavity 10 and the second sub-cavity 22, and the partition 23 is provided with an air hole 231 to connect the first sub-cavity 21 and the second sub-cavity 22; the first sub-cavity 21 and the second sub-cavity 22 both bulge toward the passenger position after inflation, so that the second sub-cavity 22 can support the head or neck of the passenger.

[0042] In this distal airbag, the gas generator 30 generates gas in the event of an accident. The gas outlet of the gas generator 30 communicates with the main chamber 10, thereby filling the main chamber 10 with the generated gas. Both the gas generator 30 and the main chamber 10 are fixedly mounted on the vehicle seat 40, preferably on the inside of the seat frame of the seat 40. This allows for timely inflation in the event of an accident and allows the gas generator to protrude adjacent to the occupant, providing rapid protection.

[0043] The secondary cavity 20 is another cavity connected to the main cavity 10. The secondary cavity 20 is connected to the main cavity 10 via a connecting portion 50 and communicates with the main cavity 10 via a first opening 51 on the connecting portion 50. Specifically, the secondary cavity 20 is fixedly connected to the passenger side of the main cavity 10 via the connecting portion 50, where the passenger side refers to the side adjacent to the passenger.

[0044] The connecting portion 50 is a component that connects the auxiliary cavity 20 to the main cavity 10. In a specific embodiment, the connecting portion 50 can be an independent component fixedly connected to the main cavity 10 and the auxiliary cavity 20, respectively, or it can be a structure integral with the main cavity 10 or the auxiliary cavity 20. There are many ways to fix the connecting portion 50 to the main cavity 10 or the auxiliary cavity 20, such as suturing, bonding, melting, etc., which are not limited here.

[0045] The sub-cavity 20 is divided into a first sub-cavity 21 and a second sub-cavity 22 by a separator 23. The separator 23 is provided with air holes 231 to connect the first sub-cavity 21 and the second sub-cavity 22. The connection relationship between the main cavity 10, the first sub-cavity 21, and the second sub-cavity 22 is as follows: the main cavity 10 is fixedly connected to the car seat 40, the first sub-cavity 21 is fixedly connected to the passenger side of the main cavity 10, and the second sub-cavity 22 is fixedly connected to the passenger side of the first sub-cavity 21. The air holes 231 provided on the separator 23 can be one or more, and the number, size, and shape of the air holes 231 on the separator 23 can be selected and defined according to actual needs and are not limited here.

[0046] The main chamber 10 and the first sub-chamber 21 are connected through the first opening 51 of the connecting portion 50, and the first sub-chamber 21 and the second sub-chamber 22 are connected through the air holes 231 in the partition 23. When the gas generating device 30 inflates the main chamber 10, the gas in the main chamber 10 flows into the first sub-chamber 21 through the first opening 51 of the connecting portion 50, and then into the second sub-chamber 22 through the air holes 231 in the partition 23. The inflation process is the airbag deployment process, in which the main chamber 10 first inflates and protrudes from the inside of the seat 40. The first sub-chamber 21 protrudes from the passenger side of the main chamber 10 toward the passenger position, that is, extends toward the passenger. The second sub-chamber 22 protrudes from the passenger side of the first sub-chamber 21 toward the passenger position, and ultimately reaches a position to receive the passenger's head or neck to protect the passenger.

[0047] The specific structure of the separator 23 in the sub-cavity 20 is shown in FIG4 , which is a schematic diagram of the structure of a separator provided in an embodiment of the present application that divides the sub-cavity into a first sub-cavity and a second sub-cavity. The separator 23 is fixedly attached to the sub-cavity 20 and divides the sub-cavity 20 into a first sub-cavity 21 and a second sub-cavity 22 . The separator 23 can be fixedly attached by sewing it into the sub-cavity 20 or by other fixing methods.

[0048] In a specific embodiment, the material, structure, shape, etc. of the separator 23 can be further configured. For example, the separator 23 can be made of the same material as the sub-cavity 20, or it can be made of a different material from the sub-cavity 20 to make the separator 23 stronger than the sub-cavity 20. The materials used for the separator 23 include PA66, PET, etc., which can be selected according to actual needs, and the performance of the separator 23 can be further enhanced by coating or other methods. In addition, the separator 23 can be set to different shapes such as elliptical and circular. No specific restrictions are imposed here.

[0049] It should be noted that when an accident occurs, the gas generator 30 is rapidly triggered to generate gas, which quickly fills the main cavity 10, the first sub-cavity 21, and the second sub-cavity 22, forming a cushion capable of absorbing the user's impact. During this process, the inflation speed is set within a preset threshold range to ensure that the second sub-cavity 22 is quickly inflated to its full capacity, ensuring occupant safety.

[0050] After inflation, the main cavity 10, the first sub-cavity 21, and the second sub-cavity 22 form three cavities. Since the first sub-cavity 21 and the second sub-cavity 22 are separated by the partition 23, and the size of the partition 23 is fixed and does not deform, the partition 23 will pull the main body of the sub-cavity 20 during inflation, so that the size of the junction of the first sub-cavity 21 and the second sub-cavity 22 remains at a preset value. The depth of the first sub-cavity 21 and the second sub-cavity 22 is also pre-set, which can limit the overall size and shape of the sub-cavity 20. Therefore, when the sub-cavity 20 is filled with gas, the partition 23 will limit the main body of the sub-cavity 20 to a preset size range, making the sub-cavity 20 appear as a long strip instead of a sphere, thereby reducing the volume of the sub-cavity 20.

[0051] Furthermore, the main cavity 10 and the first sub-cavity 21 are connected by a connecting portion 50, and the first sub-cavity 21 and the second sub-cavity 22 are connected by a partition 23. After being inflated, the main cavity 10, the first sub-cavity 21, and the second sub-cavity 22 form a three-section structure connected in sequence, and the first sub-cavity 21 and the second sub-cavity 22 are equivalent to a cantilever structure provided on the main cavity 10. When the occupant's head or neck hits the second sub-cavity 22, the impact force borne by the second sub-cavity 22 will first be transmitted to the first sub-cavity 21, and then from the first sub-cavity 21 to the main cavity 10. During the force transmission process, the partition 23 between the first sub-cavity 21 and the second sub-cavity 22 will bend, and the first sub-cavity 21 and the second sub-cavity 22 will partially deform, thereby generating a force unloading effect. During the process of bending recovery and deformation recovery, a force unloading effect will be generated, so that the reaction force generated is much smaller than the impact force, reducing the risk of injury to the occupant's head or neck and improving the protection of the distal airbag.

[0052] Taking Figure 1 as an example, the first sub-cavity 21 and the second sub-cavity 22 are located on the left side of the human body and extend toward the head of the human body in sequence. When the human body falls to the left, the head of the human body will deviate to the lower left and hit the second sub-cavity 22. The end of the second sub-cavity 22 will tend to deviate to the lower left with the impact of the human body, and the impact force borne by the second sub-cavity 22 will also be transmitted to the first sub-cavity 21. During this process, the first sub-cavity 21 and the second sub-cavity 22 form relative motion, and the partition 23 between the first sub-cavity 21 and the second sub-cavity 22 will bend. The bending process will consume part of the impact force. At the same time, the impact of the human body will squeeze the second sub-cavity 22, causing the gas distribution in the first sub-cavity 21 and the second sub-cavity 22 to change, resulting in partial shape of the first sub-cavity 21 and the second sub-cavity 22, which will also consume part of the impact force. Moreover, since the total air pressure in each cavity remains unchanged, when the second sub-cavity 22 is impacted by a human body, the gas in each cavity will always provide the first sub-cavity 21 and the second sub-cavity 22 with a restoring force to restore them to the state before the impact, so as to perform bending recovery and deformation recovery. This process will also further consume part of the impact force, so that the generated reaction force is much smaller than the impact force, reducing the risk of injury to the occupant's head or neck, and improving the protection of the distal airbag.

[0053] In this embodiment, the related structures of the main cavity 10, the first sub-cavity 21 and the second sub-cavity 22 can be further configured to enhance the protective effect of the distal airbag.

[0054] In a feasible embodiment, the first opening 51 is configured as a one-way channel that allows the inflation airflow to flow from the main cavity 10 to the sub-cavity 20. In this embodiment, the first opening 51 is a one-way channel, so that the gas can only flow from the main cavity 10 into the sub-cavity 20, and cannot flow back from the sub-cavity 20 to the main cavity 10. When an accident occurs, since the gas in the sub-cavity 20 cannot flow back to the main cavity 10, when the second sub-cavity 22 is hit by the head or neck of the occupant, the gas in the second sub-cavity 22 and the first sub-cavity 21 will only change its distribution mode in the second sub-cavity 22 and the first sub-cavity 21. The bending recovery and deformation recovery process of the second sub-cavity 22 and the first sub-cavity 21 will be faster, and the recovery effect will be more significant, thereby improving the unloading effect of the sub-cavity 20 and further improving the protection effect on the human body.

[0055] There are many specific ways to configure the first opening 51 as a one-way passage. For example, a one-way valve can be provided at the first opening 51, and the one-way valve can be provided as a flexible structure, thereby blocking the first opening 51 when not inflated and releasing the first opening 51 when inflated. In addition, a movable blocking plate, piston, or other structure can also be provided at the first opening 51 to form a structure similar to a one-way valve, which is not limited here.

[0056] Taking the example of providing a movable baffle at the first opening 51, a feasible implementation method is shown in Figure 3, where a baffle 52 is provided at the first opening 51 of the connecting portion 50, and the baffle 52 can movably cover the first opening 51; when the gas generating device 30 inflates the main cavity 10, the gas in the main cavity 10 pushes the baffle 52 open and enters the sub-cavity 20; when the inflated sub-cavity 20 is squeezed, the gas in the sub-cavity 20 acts on the baffle 52 to cause the baffle 52 to close the first opening 51.

[0057] In this embodiment, the baffle 52 acts as a one-way valve to control gas flow. When the gas generating device 30 inflates the main chamber 10, the gas pushes the baffle 52 away from the first opening 51 of the connecting portion 50 and into the secondary chamber 20. After inflation is complete, the baffle 52 re-covers the first opening 51. The pressure of the gas within the secondary chamber 20 acts on the baffle 52, which only strengthens the baffle 52's blocking effect on the first opening 51 and does not push the baffle 52 away.

[0058] This embodiment can make the main cavity 10 and the auxiliary cavity 20 independent cavities after inflation. When the second auxiliary cavity 22 is hit by the passenger's head or neck, the gas in the auxiliary cavity 20 will not flow back to the main cavity 10, thereby ensuring that the air pressure value in the auxiliary cavity 20 remains unchanged, and further ensuring the protective effect of the auxiliary cavity 20 on the human body.

[0059] In a specific embodiment, the blocking piece 52 can be sewn on the passenger side of the connecting portion 50 or on the first sub-cavity 21, and there is no limitation here. In addition, the blocking piece 52 can be single or multiple.

[0060] Taking the example of a plurality of baffles 52, a feasible implementation can be shown in Figures 3 and 5. Figure 5 is a schematic diagram of the structure of a connection portion provided by an embodiment of the present application when the first and second baffles are pushed apart by gas. Specifically, the baffles 52 include a first baffle 521 and a second baffle 522. When the first and second baffles 521 and 522 cover the first opening 51, as shown in Figure 3, the first and second baffles 521 and 522 overlap. During inflation, as shown in Figure 5, the gas pushes the first and second baffles 521 and 522 away from blocking the first opening 51. After inflation is complete, the first and second baffles 521 and 522 return to their overlapping state, blocking the first opening 51. When the gas pressure within the secondary chamber 20 acts on the first and second baffles 521 and 522, it only strengthens their blocking effect on the first opening 51 and does not push the first and second baffles 521 and 522 apart to allow the gas to flow back into the main chamber 10. Furthermore, since the first blocking piece 521 and the second blocking piece 522 have an overlapping portion, the backflow prevention effect is better.

[0061] In this embodiment, to improve the force-bearing effect of the first sub-cavity 21 and the second sub-cavity 22, the shape of the first sub-cavity 21 can be configured so that the volume of the first sub-cavity 21 is larger than the volume of the second sub-cavity 22. A feasible embodiment can be: after the first sub-cavity 21 is inflated, the cross-sectional area of ​​the first sub-cavity 21 gradually decreases in the direction extending from the main cavity 10 to the first sub-cavity 21. Of course, the first sub-cavity 21 can also be configured as other shapes such as an ellipse, which is not limited here.

[0062] In order to improve the force effect and inflation effect between the main cavity 10 and the auxiliary cavity 20, the shapes of the main cavity 10 and the auxiliary cavity 20 can be further configured so that when inflated, the convex direction of the auxiliary cavity 20 is perpendicular to the convex direction of the main cavity 10. Of course, in other configurations, the convex direction of the auxiliary cavity 20 and the convex direction of the main cavity 10 can also be set at a preset angle, which is not limited here.

[0063] In addition, in order to allow the gas generated by the gas generating device 30 to quickly fill each cavity, a gas guiding structure 60 may be provided to guide the gas to different positions for filling, thereby accelerating the filling rate.

[0064] A feasible implementation method may be that an air-guiding structure 60 is provided in the main cavity 10, and the air-guiding structure 60 includes a first channel and a second channel; the air outlets of the first channel and the second channel are separated by a preset distance, and the air inlets of the first channel and the second channel are respectively connected to the air outlet ends of the gas generating device 30.

[0065] The first channel and the second channel are used to direct the gas to different locations. For example, the first channel can direct the gas to the upper half of the main cavity 10, while the second channel directs the gas to the lower half of the main cavity 10. Alternatively, the first channel can direct the gas to the vicinity of the first opening 51 near the connecting portion 50, while the second channel directs the gas to other locations in the main cavity 10. There are many specific configurations for the first and second channels, which will not be detailed here.

[0066] In addition, it should be clear that in this embodiment, in addition to preventing the occupant's head from colliding with the vehicle body structure, the distal airbag can also prevent collisions between passengers, such as preventing the head of the driver's seat occupant from colliding with the front passenger seat occupant.

[0067] Therefore, in one embodiment, the distal airbag provided in this embodiment can be arranged between the main driver and the co-driver, and the inflated main cavity 10 can partially overlap with the central channel 70 of the vehicle. In this way, the central channel 70 of the car can support the main cavity, and the inflated main cavity can be prevented from causing excessive squeezing of the human body.

[0068] In the distal airbag provided in this embodiment, the main cavity 10 and the sub-cavity 20 are connected, and the sub-cavity 20 is divided into a first sub-cavity 21 and a second sub-cavity 22 by a partition plate 23. The first sub-cavity 21 and the second sub-cavity 22 both bulge toward the occupant position after inflation, so that the sub-cavity 20 as a whole presents a long strip bulging toward the occupant, thereby reducing the overall volume of the sub-cavity 20. In addition, the second sub-cavity 22 is a structure for supporting the head or neck of the occupant. When an accident occurs, since the first sub-cavity 21 is separated from the second sub-cavity 22 and the main cavity 10, when the second sub-cavity 22 is hit by the head or neck of the occupant, the force borne by the second sub-cavity 22 will first be transferred to the first sub-cavity 21, and the partition 23 between the second sub-cavity 22 and the first sub-cavity 21 will bend, thereby relieving part of the impact force, and the bending recovery process will unload the force again, and the first sub-cavity 21 will partially deform during the force transmission process, which will also produce a force unloading effect, thereby reducing the magnitude of the reaction force generated, reducing the risk of injury to the occupant's head or neck, and improving the protection of the distal airbag.

[0069] The first embodiment above has introduced the distal airbag in detail. Corresponding to the first embodiment, the second embodiment of the present application provides a car seat 40.

[0070] Specifically, a distal airbag is provided inside the seat frame of the car seat; the distal airbag includes: a main cavity 10, a secondary cavity 20 and a gas generating device 30;

[0071] The main cavity 10 is fixedly mounted on the seat 40, and the gas outlet end of the gas generating device 30 is connected to the main cavity 10 for inflating the main cavity 10. The secondary cavity 20 is fixedly connected to the passenger side of the main cavity 10 via a connecting portion 50. The connecting portion 50 is provided with a first opening 51 connecting the main cavity 10 and the secondary cavity 20.

[0072] The sub-cavity 20 is divided into a first sub-cavity 21 and a second sub-cavity 22 by a partition 23. The first sub-cavity 21 is located between the main cavity 10 and the second sub-cavity 22. An air hole 231 is provided on the partition 23 to connect the first sub-cavity 21 and the second sub-cavity 22. After inflation, the first sub-cavity 21 and the second sub-cavity 22 both bulge toward the occupant position so that the second sub-cavity 22 can support the head or neck of the occupant.

[0073] The car seat 40 of this embodiment is provided with any feasible distal airbag provided in the first embodiment. For details, please refer to the relevant description of the first embodiment and no redundant details are given here.

[0074] The car seat 40 provided in this embodiment has a distal airbag, and the main cavity 10 and the sub-cavity 20 of the distal airbag are connected. The sub-cavity 20 is divided into a first sub-cavity 21 and a second sub-cavity 22 by a partition plate 23, and the first sub-cavity 21 and the second sub-cavity 22 both bulge toward the occupant position after inflation, so that the sub-cavity 20 as a whole presents a long strip bulging toward the occupant, thereby reducing the overall volume of the sub-cavity 20. In addition, the second sub-cavity 22 is a structure for supporting the head or neck of the occupant. When an accident occurs, since the first sub-cavity 21 is separated from the second sub-cavity 22 and the main cavity 10, when the second sub-cavity 22 is hit by the head or neck of the occupant, the force borne by the second sub-cavity 22 will first be transferred to the first sub-cavity 21, and the partition 23 between the second sub-cavity 22 and the first sub-cavity 21 will bend, thereby relieving part of the impact force, and the bending recovery process will unload the force again, and the first sub-cavity 21 will partially deform during the force transmission process, which will also produce a force unloading effect, thereby reducing the magnitude of the reaction force generated, reducing the risk of injury to the occupant's head or neck, and improving the protection.

[0075] It should be noted that although several structures, components, or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, depending on the specific implementation of the application, the features and functions of two or more structures, components, or units described above can be embodied in one structure, component, or unit. Conversely, the features and functions of one structure, component, or unit described above can be further divided into multiple components, structures, or units for embodiment.

[0076] Furthermore, although the components of the assembly or device of the present application and the arrangement of the components are depicted in a particular order in the drawings, this does not require or imply that the assembly or device must be designed in accordance with the particular components or arrangement of the components, or that all of the components shown must be included to achieve the desired results. Additionally or alternatively, certain components may be omitted, multiple components may be combined into one component to achieve corresponding functions, and / or one component may be decomposed into multiple components to achieve corresponding functions, etc.

[0077] Although the present application is disclosed as above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A distal airbag, characterized in that: include: A main cavity, a sub-cavity and a gas generating device; The main cavity is fixedly mounted on the seat, and the gas outlet end of the gas generating device is connected to the main cavity for inflating the main cavity; the secondary cavity is fixedly connected to the passenger side of the main cavity through a connecting portion, and the connecting portion is provided with a first opening connecting the main cavity and the secondary cavity; The sub-cavity is divided into a first sub-cavity and a second sub-cavity by a partition plate. The first sub-cavity is located between the main cavity and the second sub-cavity. The partition plate is provided with an air hole to connect the first sub-cavity and the second sub-cavity. After inflation, the first sub-cavity and the second sub-cavity both bulge toward the occupant position so that the second sub-cavity can support the occupant's head or neck.

2. The distal airbag according to claim 1, characterized in that: The first opening is configured as a one-way passage allowing the inflation airflow to flow from the main cavity to the secondary cavity.

3. The distal airbag according to claim 2, characterized in that: The first opening is configured as a one-way channel allowing the inflation airflow to flow from the main cavity to the secondary cavity, specifically: a baffle is provided at the first opening, and the baffle can movably cover the first opening; when the gas generating device inflates the main cavity, the gas in the main cavity pushes the baffle open and enters the secondary cavity; when the inflated secondary cavity is squeezed, the gas in the secondary cavity acts on the baffle to cause the baffle to close the first opening.

4. The distal airbag according to claim 3, characterized in that: The blocking piece includes a first blocking piece and a second blocking piece; when the first blocking piece and the second blocking piece cover the first opening, the first blocking piece and the second blocking piece have an overlapping portion.

5. The distal airbag according to claim 1, characterized in that: After the first sub-cavity is inflated, the cross-sectional area of ​​the first sub-cavity gradually decreases in the direction extending from the main cavity to the first sub-cavity.

6. The distal airbag according to claim 1, characterized in that: The air holes provided on the separator are arranged to be one or more.

7. The distal airbag according to claim 1, characterized in that: When inflated, the protruding direction of the auxiliary cavity is perpendicular to the protruding direction of the main cavity.

8. The distal airbag according to claim 1, characterized in that: An air-guiding structure is provided in the main cavity, and the air-guiding structure includes a first channel and a second channel; the air outlets of the first channel and the second channel are separated by a preset distance, and the air inlets of the first channel and the second channel are respectively connected to the air outlet end of the gas generating device.

9. The distal airbag according to claim 1, characterized in that: The inflated main cavity partially overlaps with the central channel of the vehicle.

10. A car seat, characterized in that: A distal airbag is provided on the inner side of the seat frame of the automobile seat; the distal airbag comprises: a main cavity, a secondary cavity and a gas generating device; The main cavity is fixedly mounted on the seat, and the gas outlet end of the gas generating device is connected to the main cavity for inflating the main cavity; the secondary cavity is fixedly connected to the passenger side of the main cavity through a connecting portion, and the connecting portion is provided with a first opening connecting the main cavity and the secondary cavity; The sub-cavity is divided into a first sub-cavity and a second sub-cavity by a partition plate. The first sub-cavity is located between the main cavity and the second sub-cavity. The partition plate is provided with an air hole to connect the first sub-cavity and the second sub-cavity. After inflation, the first sub-cavity and the second sub-cavity both bulge toward the occupant position so that the second sub-cavity can support the occupant's head or neck.