Curtain airbag, airbag system, and vehicle

Abstract

The invention discloses a curtain type air bag, an air bag system and a vehicle, the curtain type air bag comprises an auxiliary cavity and a main curtain cavity, the auxiliary cavity comprises a first end and an opposite second end, and the first end is provided with a first inflation opening; the main curtain chamber is connected with the second end of the auxiliary chamber, and the auxiliary chamber and the main curtain chamber both have an unfolded state and a folded state; the secondary chamber is configured to be in a deployed state prior to the primary curtain chamber when inflated. According to the curtain type air bag, the air bag system and the vehicle, the possibility that the curtain type air bag is punctured by glass or trim can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-collision airbags, and in particular to a curtain airbag, an airbag system and a vehicle. Background Art

[0002] At present, China's automobile safety technology is developing rapidly, and people are paying more and more attention to the safety of occupants in high-speed collisions. With the update of the third-party evaluation procedures for automobile safety, the speed and barriers of side collision conditions have also changed accordingly. The 2021 version of C-NCAP includes a side 32kph pillar collision test. Compared with the previous deformable barriers, the automobile pillar collision conditions in the third-party evaluation procedures are more harsh and severe. While it is beneficial to consumers, it also increases the challenges of developing occupant protection performance. Specifically, the harshness of the automobile collision conditions will cause the window glass to break during the collision, and the side air curtains will interact with the broken window glass fragments during the deployment process. The side air curtains are cut to produce incisions, which affects the airbag pressure maintenance, resulting in hard contact between the occupant's head and the interior, etc., increasing the risk of occupant injury. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a curtain airbag, an airbag system and a vehicle, which can reduce the possibility of the curtain airbag being punctured by glass or interior decoration.

[0004] The present invention further provides a curtain airbag, the curtain airbag comprising:

[0005] The secondary chamber comprises a first end and an opposite second end, wherein the first end has a first inflation port, and the first inflation port is used to connect to a gas generator;

[0006] a main curtain chamber connected to the second end of the sub-chamber, wherein both the sub-chamber and the main curtain chamber have an extended state and a stored state;

[0007] The secondary chamber is configured to be in an expanded state prior to the primary curtain chamber when inflated.

[0008] The curtain airbag according to the embodiment of the present invention has at least the following beneficial effects:

[0009] By setting a sub-chamber, the first end of the sub-chamber has a first inflation port, and the second end opposite to the main curtain chamber is connected. During the inflation process, the airflow flows from the first inflation port into the sub-chamber until the sub-chamber is in an expanded state, that is, in a state of maximum volume. At this time, the sub-chamber has formed a relatively stable semi-rigid state under the support of the internal airflow, which can limit the position of the end of the main curtain chamber connected to the sub-chamber. Since the gas generator of the curtain airbag is arranged on the top of the vehicle, the curtain airbag is deployed downward during a collision. The side wall of the vehicle is generally gradually inclined inward from bottom to top in the height direction of the vehicle. This makes the lower the position of the main curtain chamber, the larger the gap between it and the side wall of the vehicle. By making the sub-chamber in the expanded state first, the end of the main curtain chamber connected to the sub-chamber is in a position away from the gas generator, so that the gap between the main curtain chamber and one side of the vehicle side wall is increased. The increase in the above-mentioned gap makes the main curtain chamber not stick to the vehicle side wall of the vehicle for deployment, thereby reducing the probability of being punctured by the interior and glass of the vehicle side wall.

[0010] According to some embodiments of the present invention, the curtain airbag is disposed in a vehicle, and in a deployed state, a distance between an upper end of the sub-chamber and a side wall of the vehicle is smaller than a distance between a lower end of the sub-chamber and the side wall of the vehicle.

[0011] According to some embodiments of the present invention, in the unfolded state, the volume of the main curtain chamber is greater than the volume of the secondary chamber.

[0012] According to some embodiments of the present invention, in the expanded state, the length of the sub-chamber is 50 mm-70 mm.

[0013] According to some embodiments of the present invention, in the unfolded state, along the vehicle height direction, the second end of the sub-chamber exceeds the window glass of the vehicle side wall, and the exceeding portion is less than or equal to 20% of the dimension of the window glass in the vehicle height direction.

[0014] According to some embodiments of the present invention, the sub-chamber includes a sub-chamber portion and a channel portion connected to each other, the first inflation port is located in the chamber portion, the channel portion is connected to the main curtain chamber, and the channel portion connects the chamber portion and the main curtain chamber, wherein, in the unfolded state, the cross-sectional area of ​​the channel portion is smaller than the cross-sectional area of ​​the chamber portion.

[0015] According to some embodiments of the present invention, in the expanded state, the sub-chamber portion is in the shape of a long tube.

[0016] According to some embodiments of the present invention, in the expanded state, the channel portion is in the shape of a long tube.

[0017] According to some embodiments of the present invention, when the sub-chamber and the main curtain chamber are both in the storage state, the sub-chamber is rolled up on the outside of the main curtain chamber.

[0018] An airbag system according to an embodiment of a second aspect of the present invention includes a curtain airbag and a gas generator, wherein the gas generator is in communication with the first inflation port.

[0019] A vehicle according to an embodiment of the third aspect of the present invention comprises the airbag system of the above embodiment, a vehicle body and a seat, wherein the airbag system is arranged on the top of the vehicle body, and in the deployed state, the curtain airbag is distributed between the seat and the vehicle body along the width direction of the vehicle body, and the spacing between the upper end of the sub-chamber and the side wall of the vehicle is greater than the spacing between the lower end of the sub-chamber and the side wall of the vehicle.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 It is a schematic diagram of the structure of an existing curtain airbag;

[0023] Figure 2 Schematic diagram of the structure of a curtain airbag according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] 10. curtain airbag; 100. secondary chamber; 100a. first end; 100b. second end; 200. main curtain chamber; 300. passage;

[0026] 20. Gas generator; 1. Vehicle body; 2. Vehicle window glass. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0032] For related technologies, please refer to Figure 1 A car collision may cause the window glass to break during the collision, especially for vehicles whose window glass does not use laminated glass. The interior of the vehicle is also prone to sharp fractures due to deformation during the collision. Since the side air curtain 01 is installed on the roof 03, the side air curtain 01 will unfold downward along the inner wall of the vehicle during the deployment process. At this time, the broken window glass 02 and the interior with sharp fractures may puncture the side air curtain 01, causing the internal pressure of the side air curtain 01 to decrease, thereby affecting the protection of the occupant's head.

[0033] For this, please refer to Figure 2 An embodiment of the present application provides a curtain airbag, wherein the curtain airbag 10 includes a sub-chamber 100 and a main curtain chamber 200 .

[0034] The sub-chamber 100 includes a first end 100a and an opposite second end 100b, wherein the first end 100a has a first inflation port. It is understood that the first end 100a of the sub-chamber 100 is connected to the gas generator 20 through the first inflation port, and the gas flow of the gas generator 20 flows into the sub-chamber 100 from the first inflation port.

[0035] The main curtain chamber 200 is connected to the second end 100b of the sub-chamber 100. That is, the main curtain chamber 200 is connected to the end of the sub-chamber 100 away from the gas generator 20. The main curtain chamber 200 is the main chamber of the curtain airbag 10, which is used to support and cushion people in a collision scenario.

[0036] The sub-chamber 100 and the main curtain chamber 200 both have an extended state and a stored state. In the stored state, the sub-chamber 100 and the main curtain chamber 200 are inflated so that the two can switch to the extended state. In the extended state, the sub-chamber 100 and the main curtain chamber 200 expand to the maximum value. In the stored state, the sub-chamber 100 and the main curtain chamber 200 are rolled up and stored, and the end of the main curtain chamber 200 away from the sub-chamber 100 is the starting point of the rolling and is rolled up inside.

[0037] When inflated, the secondary chamber 100 is in the expanded state before the main curtain chamber 200. That is, when the secondary chamber 100 is expanded to the maximum volume, the main curtain chamber 200 is still expanding.

[0038] In the above embodiment, by setting the sub-chamber 100, the first end 100a of the sub-chamber 100 has a first inflation port, and the opposite second end 100b is connected to the main curtain chamber 200. During the inflation process, the airflow flows into the sub-chamber 100 from the first inflation port until the sub-chamber 100 is in the expanded state, that is, in the state of maximum volume. At this time, the sub-chamber 100 has formed a relatively stable semi-rigid state under the support of the internal airflow, which can limit the position of the end of the main curtain chamber 200 connected to the sub-chamber 100. Since the gas generator 20 of the curtain airbag 10 is arranged on the top of the vehicle, the curtain airbag 10 is deployed downward during a collision. The vehicle window glass 2 is generally gradually tilted inward from bottom to top in the vehicle height direction. This makes the main curtain chamber 200 The lower the position, the larger the gap between it and the vehicle window glass 2.

[0039] By making the sub-chamber 100 in the expanded state first, the end of the main curtain chamber 200 connected to the sub-chamber 100 is located away from the gas generator 20, so that the distance between the main curtain chamber 200 and one side of the window glass 2 is increased. The increase in the distance prevents the main curtain chamber 200 from being expanded against the side wall of the vehicle, thereby reducing the probability of being punctured by the interior and the window glass 2.

[0040] In some embodiments, the curtain airbag is disposed in a vehicle, and in the deployed state, the distance between the upper end of the sub-chamber 100 and the side wall of the vehicle is smaller than the distance between the lower end of the sub-chamber 100 and the side wall of the vehicle. The side wall of the vehicle includes interior decoration and window glass. By making the distance between the upper end of the sub-chamber 100 and the side wall of the vehicle smaller than the distance between the lower end of the sub-chamber 100 and the side wall of the vehicle in the deployed state, the distance between the main curtain chamber 200 and the adjacent window glass 2 and the side of the interior decoration is increased, and the above-mentioned increase in the distance makes the main curtain chamber 200 not attached to the side wall of the vehicle when deployed.

[0041] It is understood that the volumes of the sub-chamber 100 and the main curtain chamber 200 are not limited. In some embodiments, in the unfolded state, the volume of the main curtain chamber 200 is greater than the volume of the sub-chamber 100. It is understood that by making the volume of the sub-chamber 100 relatively small, the time for the sub-chamber 100 to switch from the stored state to the unfolded state can be reduced, so that the sub-chamber 100 can enter the unfolded state in a shorter time, and then when the vehicle collides, the main curtain chamber 200 is in a position away from the gas generator 20 in less time.

[0042] In some embodiments, in the unfolded state, the length of the sub-chamber 100 is 50 mm-70 mm. In the unfolded state, the sub-chamber 100 is in a substantially vertical state, and the length of the sub-chamber 100 is substantially the same as the downward displacement of the main curtain chamber 200 at the unfolded starting position.

[0043] In some embodiments, in the unfolded state, along the height direction of the vehicle, the second end of the secondary chamber 100 exceeds the window glass of the vehicle side wall, and the exceeding portion is less than or equal to 20% of the size of the window glass in the height direction of the vehicle. In this way, the unfolding starting position of the main curtain chamber 200 is as far away from the top wall of the vehicle as possible, while not affecting the support and protection of the main curtain chamber 200 for the occupants.

[0044] It is understandable that the method of inflating the main curtain chamber 200 is not limited.

[0045] In some embodiments, the sub-chamber 100 includes a sub-chamber portion and a channel portion 300 connected to each other, the first inflation port is located in the chamber portion, the channel portion 300 is connected to the main curtain chamber 200, and the channel portion 300 connects the chamber portion and the main curtain chamber 200, wherein, in the unfolded state, the cross-sectional area of ​​the channel portion 300 is smaller than the cross-sectional area of ​​the chamber portion.

[0046] The second end of the sub-chamber 100 is connected to the main curtain chamber 200, and a part of the second end of the sub-chamber 100 is closed, and a channel portion 300 is formed between adjacent closed areas, and the channel portion 300 connects the main curtain chamber 200 and the sub-chamber 100. Airflow can flow from the sub-chamber 100 into the main curtain chamber 200 through the channel 300.

[0047] During the inflation process, air flows into the sub-chamber portion from the first inflation port, and the sub-chamber portion begins to expand. Part of the airflow flows into the main curtain chamber 200 from the channel portion 300, and the main curtain chamber 200 begins to expand. Since the cross-sectional area of ​​the channel portion 300 is smaller than the cross-sectional area of ​​the sub-chamber portion, part of the airflow is blocked, thereby accelerating the expansion speed of the sub-chamber portion, so that the sub-chamber portion expands quickly until it is in the expanded state, and since the cross-sectional area of ​​the above-mentioned channel portion 300 is small, the sub-chamber portion 100 can be better supported by the internal airflow and maintained in the expanded state.

[0048] It should be noted that when the sub-chamber portion is in the expanded state, all the airflow flows through the channel portion 300, so that the amount of airflow passing through the channel portion 300 per unit time is relatively large. The above-mentioned airflow can play a supporting role and make the channel portion 300 in a semi-rigid state. In this state, the above-mentioned channel portion 300 has the ability to resist bending and can limit the main curtain chamber 200 from tilting toward the side of the vehicle window glass 2, thereby further reducing the probability of the main curtain chamber 200 being punctured.

[0049] The shape of the sub-chamber 100 is not limited. In some embodiments, the sub-chamber portion is in a long cylindrical shape in the unfolded state. It is understandable that the sub-chamber 100 is in a long cylindrical shape, which can reduce its volume on the one hand, and on the other hand, has good bending strength in the unfolded state and is not easy to bend toward the side of the vehicle window glass 2.

[0050] In some embodiments, the channel portion 300 is in the shape of a long tube. Thus, in the unfolded state, the channel portion 300 has good bending strength and is not easy to bend toward the side of the vehicle window glass 2.

[0051] In some embodiments, the sub-chamber 100 and the main curtain chamber 200 are rolled up and stored, and in the stored state, the sub-chamber 100 is located outside the main curtain chamber 200. The first gas outlet is located at the end of the rolled structure to facilitate connection with the gas generator 20.

[0052] The present application also provides an airbag system, including a curtain airbag 10 and a gas generator 20, wherein the gas generator 20 is connected to the first inflation port. The gas generator 20 is disclosed in the prior art and will not be described in detail here.

[0053] The present application also provides a vehicle, an airbag system, a vehicle body 1 and a seat, wherein the airbag system is arranged on the top of the vehicle body 1, and in the deployed state, the curtain airbag 10 is distributed between the seat and the side wall of the vehicle body 1. In this way, the head of the human body can be protected in the event of a side impact.

[0054] In the deployed state, the distance between the upper end of the sub-chamber 100 and the side wall of the vehicle body is greater than the distance between the lower end of the sub-chamber 100 and the side wall of the vehicle body. The side wall of the vehicle includes the interior and the window glass. Thus, in the deployed state, the distance between the main curtain chamber 200 and the adjacent window glass 2 and the side of the interior increases. The increase in the distance prevents the main curtain chamber 200 from being deployed against the side wall of the vehicle, thereby greatly reducing the possibility of broken window glass and interior with sharp fractures piercing the curtain airbag.

[0055] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A curtain airbag, characterized in that: The curtain airbag comprises: The secondary chamber comprises a first end and an opposite second end, wherein the first end has a first gas filling port, and the first gas filling port is used to connect to a gas generator; a main curtain chamber connected to the second end of the sub-chamber, wherein both the sub-chamber and the main curtain chamber have an extended state and a stored state; The secondary chamber is configured to be in an expanded state prior to the primary curtain chamber when inflated.

2. The curtain airbag according to claim 1, characterized in that: The curtain airbag is disposed in a vehicle, and in a deployed state, a distance between an upper end of the sub-chamber and a side wall of the vehicle is smaller than a distance between a lower end of the sub-chamber and the side wall of the vehicle.

3. The curtain airbag according to claim 1, characterized in that: In the unfolded state, the volume of the main curtain chamber is greater than the volume of the secondary chamber.

4. The curtain airbag according to claim 1, characterized in that: In the expanded state, the length of the sub-chamber is 50mm-70mm.

5. The curtain airbag according to claim 1, characterized in that: In the unfolded state, along the height direction of the vehicle, the second end of the sub-chamber exceeds the window glass of the vehicle side wall, and the exceeding portion is less than or equal to 20% of the dimension of the window glass in the height direction of the vehicle.

6. The curtain airbag according to claim 1, characterized in that: The sub-chamber includes a sub-chamber portion and a channel portion connected to each other, the first inflation port is located in the chamber portion, the channel portion is connected to the main curtain chamber, and the channel portion connects the chamber portion and the main curtain chamber, wherein in the unfolded state, the cross-sectional area of ​​the channel portion is smaller than the cross-sectional area of ​​the chamber portion.

7. The curtain airbag according to claim 6, characterized in that: In the expanded state, the sub-chamber portion is in the shape of a long tube; and / or, in the expanded state, the channel portion is in the shape of a long tube.

8. The curtain airbag according to claim 1, characterized in that: When the sub-chamber and the main curtain chamber are both in the storage state, the sub-chamber is rolled up on the outside of the main curtain chamber.

9. An airbag system, characterized in that: It comprises the curtain airbag according to any one of claims 1 to 8 and a gas generator, wherein the gas generator is connected to the first inflation port.

10. A vehicle, characterized in that: It includes the airbag system as described in claim 9, a vehicle body and a seat, the airbag system is arranged on the top of the vehicle body, and in the deployed state, the curtain airbag is distributed between the seat and the side wall of the vehicle body, and the interval between the upper end of the sub-chamber and the side wall of the vehicle body is smaller than the interval between the lower end of the sub-chamber and the side wall of the vehicle body.

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