Airbag, airbag system and vehicle

Abstract

The utility model provides a kind of safety air bag, safety air bag system and vehicle, it includes: air bag body, partition and gas generating device, air bag body has contraction state and unfolded state, partition separates the inside of air bag body into first chamber and second chamber, gas generating device is set in second chamber, there is vent valve between first chamber and second chamber, when air bag body is in unfolded state, when the air pressure of first chamber is greater than the air pressure of second chamber, vent valve limits the gas in first chamber to flow into second chamber inside. The utility model solves the problem that when safety air bag is in unfolded state, the air pressure in chamber is too high, which causes the impact on the passengers to be too large, resulting in injury.

Description

Technical Field

[0001] This utility model belongs to the technical field of vehicle safety devices, specifically relating to an airbag, an airbag system, and a vehicle. Background Technology

[0002] As automotive seats and interior structures evolve towards personalization and functional integration, traditional single-chamber side airbags face significant technical bottlenecks in handling complex collision scenarios. The currently prevalent integrated airbag structure suffers from uneven pressure distribution, and its single-chamber design exhibits a marked decrease in protective effectiveness when addressing occupants of different body sizes and varying collision energy absorption requirements. Current improvement solutions primarily focus on foldable dual-chamber structures, where a single chamber is folded in half to form two connected chambers. However, this foldable dual-chamber structure creates two connected chambers. During a collision, the pressure in the chamber facing the passenger is higher due to the vehicle's compression, resulting in inadequate energy absorption and increasing the risk of injury to occupants due to excessive impact force. Utility Model Content

[0003] This utility model provides an airbag, an airbag system, and a vehicle to solve the problem that when the airbag is deployed, the excessive air pressure in the chamber causes excessive impact force on the occupants, resulting in injury.

[0004] To solve or improve the above-mentioned technical problems to a certain extent, this utility model provides an airbag, comprising: an airbag body, a partition, and a gas generating device. The airbag body has a contracted state and an deployed state. The partition divides the interior of the airbag body into a first chamber and a second chamber. The gas generating device is disposed in the second chamber. A vent valve is provided between the first chamber and the second chamber. When the airbag body is in the deployed state, the vent valve restricts the flow of gas from the first chamber into the second chamber when the air pressure in the first chamber is greater than the air pressure in the second chamber.

[0005] In some embodiments, the vent valve includes a vent hole formed on the partition and a shielding member disposed on the side of the partition facing the first chamber, the orthographic projection of the shielding member on the partition covering the vent hole;

[0006] When the air pressure in the second chamber is greater than the air pressure in the first chamber, the gas enters the first chamber through the vent. When the air pressure in the first chamber is greater than the air pressure in the second chamber, the shielding member covers the vent to restrict the gas in the first chamber from flowing into the second chamber.

[0007] In some embodiments, the shielding member is a sheet-like structure, comprising two opposing fixed portions and a free portion located between the two fixed portions, the two fixed portions being fixedly connected to the partition portion.

[0008] In some embodiments, the width of the free portion in the direction perpendicular to the fixed portion is greater than the distance between the two fixed portions; or

[0009] The free part is elastic.

[0010] In some embodiments, the vent valve is a one-way valve, which opens the second chamber toward the first chamber and closes the first chamber toward the second chamber, with the body of the one-way valve located inside the first chamber.

[0011] In some embodiments, the airbag body is provided with a vent hole, which connects the second chamber to the outside of the airbag body.

[0012] In some embodiments, the airbag body is provided with a weak part, and when the air pressure in the second chamber reaches a preset value, the weak part is damaged to form a vent hole connecting the second chamber and the outside of the airbag body.

[0013] In some embodiments, when the airbag body is in the deployed state, the volume of the second chamber is larger than the volume of the first chamber.

[0014] According to another aspect of the present invention, an airbag system is provided, including a controller, a sensor, and an airbag as described in any of the above embodiments, wherein the controller triggers the airbag when it receives a signal from the sensor.

[0015] According to another aspect of the present invention, a vehicle is provided, including the airbag system described in any of the above embodiments.

[0016] The airbag of this invention has a first chamber and a second chamber, with a vent valve installed between the two chambers. When the air pressure in the first chamber is greater than that in the second chamber, the vent valve can restrict the flow of gas from the first chamber into the second chamber. Thus, in the event of a vehicle collision, the first chamber is kept at a high pressure, preventing the airbag from being punctured by the vehicle body and avoiding injury to the occupants due to vehicle deformation. On the other hand, the second chamber is kept at a low pressure, thereby improving the energy absorption effect of the airbag and reducing the degree of bodily injury caused by the impact of the airbag on the occupants during a vehicle collision.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a perspective structural diagram of an airbag according to an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional structural schematic diagram of an airbag according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the partition and the vent valve of an airbag according to an embodiment of the present invention;

[0021] Figure 4 This is a top view of the position of the airbag in the deployed state according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the airbag deployment state according to an embodiment of the present invention.

[0023] [Symbol Explanation]

[0024] 1: Airbag

[0025] 10: Airbag body

[0026] 11: First Chamber

[0027] 12: Second Chamber

[0028] 13: Vent valve

[0029] 130: Vent

[0030] 131: Covering component

[0031] 1310: Fixing part

[0032] 1311: Freedom Department

[0033] 14: Vent hole

[0034] 20: Divider

[0035] 30: Gas generating device

[0036] 2: Vehicle body

[0037] 3: Passengers Detailed Implementation

[0038] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation methods and effects of an airbag, airbag system, and vehicle based on this utility model.

[0039] According to an embodiment of the present invention, a safety airbag is provided, such as... Figure 1 and Figure 2 As shown, the airbag 1 includes an airbag body 10, a partition 20, and a gas generating device 30.

[0040] The partition 20 divides the interior of the airbag body 10 into a first chamber 11 and a second chamber 12, and the gas generating device 30 is disposed in the second chamber 12.

[0041] Optionally, the airbag body 10 is a single unit, and the partition 20 is disposed inside the airbag body 10, dividing the interior of the airbag body 10 into two independent chambers, namely the first chamber 11 and the second chamber 12.

[0042] Optionally, there are two airbag bodies 10, and the adjacent surfaces of the two airbag bodies 10 are fixedly connected by means of sewing or other methods, and the contact surfaces of the two airbag bodies 10 together constitute the partition 20.

[0043] Optionally, the airbag body 10 and the partition 20 are made of the same material, such as nylon. Of course, the airbag body 10 and the partition 20 can also be made of different materials. This invention is not limited to the specific materials of the airbag body 10 and the partition 20.

[0044] like Figures 1-3 As shown, a ventilation valve 13 is provided between the first chamber 11 and the second chamber 12 of the airbag body 10. The ventilation valve 13 is provided on the partition 20. When the airbag body 10 is in the deployed state and the air pressure in the first chamber 11 is greater than the air pressure in the second chamber 12, the ventilation valve 13 restricts the flow of gas in the first chamber 11 into the second chamber 12.

[0045] Specifically, after receiving a start signal, the gas generating device 30 in the second chamber 12 releases gas. The released gas flows from the second chamber 12 into the first chamber 11 through the vent valve 13, making the air pressure in the first chamber 11 and the second chamber 12 the same. When the first chamber 11 of the airbag body 10 is compressed by the vehicle body 2, the air pressure in the first chamber 11 increases. At this time, the air pressure in the first chamber 11 is greater than the air pressure in the second chamber 12. To prevent the gas in the first chamber 11 from entering the second chamber 12, the vent valve 13 restricts the flow of gas from the first chamber 11 into the second chamber 12. On the one hand, this ensures that the air pressure in the first chamber 11 is high enough to prevent the vehicle body 2 from puncturing the first chamber 11. On the other hand, it does not increase the air pressure in the second chamber 12, so as to prevent the impact force on the occupant 3 from being too great due to the excessive air pressure in the second chamber 12, which could cause injury to the occupant 3.

[0046] In one embodiment, such as Figure 2 and Figure 3 As shown, the vent valve 13 includes a vent 130 and a shield 131. The vent 130 is formed on the partition 20 and connects the first chamber 11 and the second chamber 12 of the airbag body 10. Gas released by the gas generating device 30 can flow from the second chamber 12 into the first chamber 11 through the vent 130, making the air pressure in the first chamber 11 equal to the air pressure in the second chamber 12. At this time, the airbag body 10 is in the deployed state.

[0047] The shielding member 131 is disposed on the partition 20 and connected to the side of the partition 20 facing the first chamber 11. The orthographic projection of the shielding member 131 on the partition 20 can completely cover the vent 130, that is, the area of ​​the orthographic projection of the shielding member 131 on the partition 20 is larger than the area of ​​the vent 130.

[0048] like Figure 4 As shown, when the first chamber 11 of the airbag body 10 is compressed due to the deformation of the vehicle body 2, the air pressure in the first chamber 11 will increase. At this time, the air pressure in the first chamber 11 is greater than the air pressure in the second chamber 12. Under the action of the air pressure difference, the shield 131 will block the vent 130, thereby restricting the gas in the first chamber 11 from entering the second chamber 12. This ensures that the first chamber 11 has sufficient air pressure to prevent it from being punctured by the vehicle body 2, and also prevents the air pressure in the second chamber 12 from being too high, which would cause excessive impact on the passenger 3.

[0049] In one embodiment, such as Figure 3As shown, the shielding member 131 has a sheet-like structure, which includes two opposing fixed portions 1310 and a free portion 1311 located between the two fixed portions 1310. The shielding member 131 is fixedly connected to the partition portion 20 through the two fixed portions 1310, and the two fixed portions 1310 are respectively located outside the vent hole 130, while the free portion 1311 covers the side of the vent hole 130 facing the first chamber 11.

[0050] Optionally, the width of the free portion 1311 of the shielding member 131 in the direction perpendicular to the fixed portion 1310 is greater than the distance between the two fixed portions 1310. That is, when the air pressure in the second chamber 12 is greater than or equal to the air pressure in the first chamber 11, the free portion 1311 of the shielding member 131 is not tightly attached to the partition portion 20. However, when the air pressure in the first chamber 11 is greater than the air pressure in the second chamber 12, under the action of the air pressure difference between the first chamber 11 and the second chamber 12, the free portion 1311 will be tightly attached to the partition portion 20 to block the vent 130, thereby preventing the gas in the first chamber 11 from flowing into the second chamber 12.

[0051] Optionally, the shielding member 131 and the partition 20 can be made of the same material, such as nylon. Of course, the shielding member 131 and the partition 20 can also be made of different materials. This invention is not limited to the specific material of the shielding member 131.

[0052] Optionally, the free portion 1311 of the shielding member 131 is elastic. When the air pressure in the first chamber 11 and the second chamber 12 is balanced, the shielding member 131 can be tightly attached to the partition 20, or the elastic free portion 1311 can be configured such that its width in the direction perpendicular to the fixed portion 1310 is greater than the distance between the two fixed portions 1310. When the air pressure in the second chamber 12 is greater than the air pressure in the first chamber 11, under the action of the air pressure difference, the elastic free portion 1311 moves toward the first chamber 11 (i.e., moves away from the vent 130), so that the air pressure in the second chamber 12 flows into the first chamber 11 through the vent 130. When the air pressure in the first chamber 11 is greater than the air pressure in the second chamber 12, the free part 1311, under the action of the air pressure difference and the elasticity of the free part 1311, adheres tightly to the partition 20 to block the vent 130, so that the gas in the first chamber 11 will not flow into the second chamber 12.

[0053] Optionally, the fixing part 1310 of the shielding member 131 can be fixedly connected to the partition part 20 by sewing or by adhesive bonding. Of course, the connection method between the fixing part 1310 of the shielding member 131 and the partition part 20 is not limited to this, and any connection method that can ensure the connection strength between the shielding member 131 and the partition part 20 is acceptable.

[0054] In this embodiment, when the gas generating device 30 releases gas, because the gas generating device 30 is located in the second chamber 12, the air pressure in the second chamber 12 will be greater than the air pressure in the first chamber 11. Under the action of the air pressure difference, the free part 1311 of the blocking member 131 moves towards the first chamber 11, and the vent 130 can connect the first chamber 11 and the second chamber 12, so that the gas in the second chamber 12 can enter the first chamber 11 through the vent 130, ultimately achieving air pressure balance between the first chamber 11 and the second chamber 12. When a vehicle collision occurs, the compression of the first chamber 11 by the vehicle body 2 causes the air pressure in the first chamber 11 to be greater than the air pressure in the second chamber 12. At this time, under the action of the air pressure difference between the first chamber 11 and the second chamber 12, the free part 1311 of the shield 131 is tightly attached to the partition 20, completing the shielding of the vent 130 and restricting the gas in the first chamber 11 from flowing into the second chamber 12. On the one hand, it ensures the high air pressure state of the first chamber 11 and avoids the vehicle body 2 from puncturing the first chamber 11 and causing injury to the human body. On the other hand, it makes the second chamber 12 a low air pressure state, which can better absorb energy and avoid causing a huge impact to the passengers 3 and causing personal injury.

[0055] In one embodiment, the vent valve 13 is a one-way valve. The one-way valve is open when gas flows from the second chamber 12 to the first chamber 11, and closed when gas flows from the first chamber 11 to the second chamber 12.

[0056] When a vehicle collision occurs, the one-way valve may move toward the occupant 3 due to the compression of the vehicle body 2. In order to avoid injury to the human body by the one-way valve, the body of the one-way valve is located in the first chamber 11.

[0057] In one embodiment, such as Figure 1 and Figure 2 As shown, the airbag body 10 is provided with a vent hole 14, which can connect the second chamber 12 with the outside of the airbag body 10, so that the gas in the second chamber 12 can be released to the outside of the airbag body 10 through the vent hole 14.

[0058] In this embodiment, by setting the vent 14, when a vehicle collision occurs and the airbag body 10 is in the deployed state, the vent 14 will release some of the gas in the second chamber 12 to the outside of the airbag body 10. By releasing the gas in the second chamber 12, the air pressure in the second chamber 12 can be gradually reduced, thereby absorbing the energy generated by the collision and reducing the injury to the occupants 3 caused by the vehicle collision.

[0059] The size of the vent 14 can be selected according to the size of the airbag 1 and the installation position. This utility model is not limited to the size of the vent 14.

[0060] In one embodiment, the airbag body 10 is provided with a weak part (not shown in the figure). When the air pressure in the second chamber 12 reaches a preset value, the weak part can be damaged. After the weak part is damaged, it forms a vent hole 14 that connects the second chamber 12 and the outside of the airbag body 10, so as to release the gas in the second chamber 12 and reduce the air pressure in the second chamber 12.

[0061] In this embodiment, by providing a weak point on the airbag body 10, it can be ensured that the gas inside the airbag body 10 will not leak outward when the airbag changes from a contracted state to an deployed state, thereby enabling the airbag body 10 to quickly reach the deployed state. When the airbag reaches the fully deployed state, or when a vehicle collision occurs and the air pressure inside the second chamber 12 increases due to the compression of the vehicle body 2 (i.e., when the air pressure inside the second chamber 12 reaches a preset value), the weak point ruptures under the action of air pressure, causing the gas inside the second chamber 12 to be released outward. This gradually reduces the air pressure inside the second chamber 12, absorbing the energy generated by the collision and reducing the injury to the occupants 3 caused by the vehicle collision.

[0062] In one embodiment, such as Figure 2 and Figure 4 As shown, when the airbag body 10 is in the deployed state, the volume of the second chamber 12 is larger than the volume of the first chamber 11.

[0063] Optionally, when the airbag body 10 is in the deployed state, the thickness of the second chamber 12 is greater than the thickness of the first chamber 11. Thus, when a vehicle collision occurs, the second chamber 12, which is in contact with the occupant 3, can provide a greater buffer distance L, thereby effectively reducing the impact force on the occupant 3.

[0064] Optionally, when the airbag body 10 is in the deployed state, the coverage area of ​​the second chamber 12 is greater than that of the first chamber 11, so as to increase the contact area between the occupant 3 and the airbag body 10, thereby increasing the protection area for the occupant 3.

[0065] Optionally, when the airbag body 10 is in the deployed state, the thickness of the second chamber 12 is greater than the thickness of the first chamber 11, and the coverage area of ​​the second chamber 12 is greater than the coverage area of ​​the first chamber 11, so as to effectively reduce the impact force on the occupant 3 when the vehicle collides, while also increasing the protection area of ​​the occupant 3's body.

[0066] Another embodiment of the present invention provides an airbag 1 system, including a controller, a sensor, and the airbag 1 described in any of the above embodiments.

[0067] The controller is connected to the gas generator 30 in the sensor and the airbag 1. When the vehicle is involved in a collision, the sensor detects the collision signal and sends the signal to the controller. After receiving the signal, the controller controls the gas generator 30 to release gas so that the airbag 1 is deployed.

[0068] Another embodiment of this utility model provides a vehicle that includes the airbag system described in the above embodiments.

[0069] like Figure 4 As shown, when a vehicle collision occurs and the airbag 1 is deployed, the first chamber 11 of the airbag 1 faces the vehicle body 2, and the second chamber 12 faces the occupants 3.

[0070] Optionally, such as Figure 5 As shown, the airbag 1 is a side airbag, meaning that when the airbag 1 is deployed, it is positioned between the car door and the seat. Of course, the airbag 1 can also be a head airbag, knee airbag, etc., and this utility model is not limited to the specific installation position of the airbag 1.

[0071] The airbag of this invention has a first chamber and a second chamber, with a vent valve installed between the two chambers. When the air pressure in the first chamber is greater than that in the second chamber, the vent valve can restrict the flow of gas from the first chamber into the second chamber. Thus, in the event of a vehicle collision, the first chamber is kept at a high pressure, preventing the airbag from being punctured by the vehicle body and avoiding injury to the occupants due to vehicle deformation. On the other hand, the second chamber is kept at a low pressure, thereby improving the energy absorption effect of the airbag and reducing the degree of bodily injury caused by the impact of the airbag on the occupants during a vehicle collision.

[0072] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An airbag, characterized in that, include: The airbag body comprises a partition and a gas generating device. The airbag body has a contracted state and an deployed state. The partition divides the interior of the airbag body into a first chamber and a second chamber. The gas generating device is disposed in the second chamber. A vent valve is provided between the first chamber and the second chamber. When the airbag body is in the deployed state, the vent valve restricts the flow of gas from the first chamber into the second chamber when the air pressure in the first chamber is greater than the air pressure in the second chamber.

2. The airbag according to claim 1, characterized in that, The vent valve includes a vent hole formed on the partition and a shielding member disposed on the side of the partition facing the first chamber, the orthographic projection of the shielding member on the partition covering the vent hole; When the air pressure in the second chamber is greater than the air pressure in the first chamber, the gas enters the first chamber through the vent. When the air pressure in the first chamber is greater than the air pressure in the second chamber, the shielding member covers the vent to restrict the gas in the first chamber from flowing into the second chamber.

3. The airbag according to claim 2, characterized in that, The shielding member has a sheet-like structure and includes two opposing fixed parts and a free part located between the two fixed parts. The two fixed parts are fixedly connected to the partition.

4. The airbag according to claim 3, characterized in that, The width of the free portion in the direction perpendicular to the fixed portion is greater than the distance between the two fixed portions; or The free part is elastic.

5. The airbag according to claim 1, characterized in that, The vent valve is a one-way valve, which opens from the second chamber toward the first chamber and closes from the first chamber toward the second chamber. The body of the one-way valve is located inside the first chamber.

6. The airbag according to claim 1, characterized in that, The airbag body is provided with a vent hole, which connects the second chamber to the outside of the airbag body.

7. The airbag according to claim 1, characterized in that, The airbag body has a weak part. When the air pressure in the second chamber reaches a preset value, the weak part breaks to form a vent hole that connects the second chamber to the outside of the airbag body.

8. The airbag according to claim 1, characterized in that, When the airbag body is in the deployed state, the volume of the second chamber is larger than the volume of the first chamber.

9. An airbag system, characterized in that, The device includes a controller, a sensor, and an airbag as described in any one of claims 1-8, wherein the controller triggers the airbag when it receives a signal from the sensor.

10. A vehicle, characterized in that, The airbag system of claim 9 includes an airbag body in which, when the airbag body is in the deployed state, the first chamber of the airbag body faces the vehicle body and the second chamber faces the occupant.

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