Safety air bag and automobile

Abstract

The utility model provides an air bag restraint system and an automobile. The air bag restraint system comprises an air bag body and an air generator. The air bag body comprises a buffering cloth piece and at least two inflation cavities. The first end parts of the at least two inflation cavities are converged and arranged to form an inflation end part of the air bag body, and the parts, except the first end parts, of the inflation cavities form an inflation supporting part of the air bag body; each buffering cloth piece is connected between the two inflation cavities, and the buffering cloth pieces have the size corresponding to the to-be-protected part of the human body; the gas generator is arranged at the inflation end of the air bag body, all the inflation cavities can be inflated through the inflation end of the air bag body, and all the inflated inflation cavities are unfolded to form the inflation supporting part. The buffering cloth piece connected between the two inflation cavities is unfolded under the supporting of the inflation supporting part, and a supporting position corresponding to the to-be-protected part of the human body is formed.

Description

Technical Field

[0001] This application relates to the field of automotive safety technologies, specifically to an airbag, and also to an automobile. Background Art

[0002] With the continuous improvement of people's living standards, automobiles have become one of the indispensable means of transportation for people to travel, and people's requirements for the safety of automobiles are also getting higher and higher. Among them, the airbag is one of the important components in the automotive safety system. When an automobile accident occurs, the gas generator in the airbag will generate gas, and the generated gas will rush towards and fill the airbag, so that the airbag expands and unfolds, which can protect the lives of passengers and avoid passengers from being injured.

[0003] Currently, when an automobile accident occurs, the airbag will expand rapidly. When the airbag body unfolds, it has a strong impact force. If the inflatable cavity comes into direct contact with the passenger, the inflatable cavity is very likely to hit the passenger and cause injury.

[0004] Therefore, how to avoid the direct contact between the inflatable cavity and the passenger when the airbag inflates and unfolds, so as to reduce the direct impact of the inflatable cavity on the passenger, has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] This application provides an airbag to solve the technical problem of how to avoid the direct contact between the inflatable cavity and the passenger when the airbag inflates and unfolds in the prior art, so as to reduce the direct impact of the inflatable cavity on the passenger. This application also provides an automobile using the above airbag.

[0006] This application provides an airbag,

[0007] The airbag includes: an airbag body and a gas generator;

[0008] The airbag body includes a buffer fabric piece and at least two inflatable cavities;

[0009] The first ends of at least two of the inflatable cavities are convergently arranged to form the inflatable end of the airbag body, and the parts of the inflatable cavities except the first ends form the inflatable support part of the airbag body;

[0010] Each buffer fabric piece is connected between two of the inflatable cavities, and the buffer fabric piece has a size corresponding to the part of the human body to be protected;

[0011] The gas generator is provided at the inflation end of the airbag body and can inflate each of the inflation cavities through the inflation end of the airbag body. After inflation, each of the inflation cavities unfolds to form the inflation support portion, and the buffer fabric pieces connected between the two inflation cavities unfold under the support of the inflation support portion to form the support positions corresponding to the body parts to be protected.

[0012] Optionally, the body part to be protected is the knee; the at least two inflation cavities include three inflation cavities, and the buffer fabric pieces include two buffer fabric pieces;

[0013] The three inflation cavities are arranged side by side, and one buffer fabric piece is connected between every two adjacent inflation cavities;

[0014] After the three inflation cavities are inflated to form the inflation support portion, the buffer fabric pieces connected between the adjacent two inflation cavities respectively unfold under the support of the inflation support portion to form the support positions corresponding to the human knees.

[0015] Optionally, after each inflation cavity unfolds to form the inflation support portion, except for the inflation ends, the inflation support portions are isolated from each other.

[0016] Optionally, after each inflation cavity unfolds to form the inflation support portion, except for the inflation ends, there are communication portions communicating with each other between the adjacent inflation support portions.

[0017] Optionally, the communication portion is close to the body part to be protected, and the channel of the communication portion is perpendicular to the extension direction of the inflation support portion.

[0018] Optionally, the structure of at least one inflation cavity unfolds into two inflation expansion branches from the first end to the distal end, and converges and communicates at the second end extending to the distal end, and the two inflation expansion branches construct the inflation support portion.

[0019] Optionally, after each inflation cavity unfolds to form the inflation support portion, the outer contour shape of the inflation support portion fits the space contour provided by the installation position.

[0020] Optionally, the structures of the inflation cavities on both sides are in the following form: the structure of the inflation cavity unfolds into two inflation expansion branches from the first end to the distal end, and converges and communicates at the second end extending to the distal end, and the two inflation expansion branches construct the inflation support portion; the structure of the inflation cavity in the middle is in the following form: the structure of the inflation cavity extends from the first end to the second end at the distal end to form the plate-shaped inflation support portion at the middle position of the airbag body.

[0021] The present application also provides an automobile, and the automobile includes the airbag of any one of the above.

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

[0023] The present application provides an airbag, and the airbag includes: an airbag body and a gas generator; the airbag body includes a buffer fabric piece and at least two inflatable cavities; the first ends of the at least two inflatable cavities are convergently arranged to form an inflatable end of the airbag body, and the parts of the inflatable cavities except the first ends form an inflatable support part of the airbag body; each buffer fabric piece is connected between the two inflatable cavities, and the buffer fabric piece has a size corresponding to the part of the human body to be protected; the gas generator is arranged at the inflatable end of the airbag body and can inflate each of the inflatable cavities through the inflatable end of the airbag body. After inflation, each of the inflatable cavities expands to form the inflatable support part, and the buffer fabric piece connected between the two inflatable cavities expands under the support of the inflatable support part to form a support position corresponding to the part of the human body to be protected.

[0024] For the airbag provided by the present application, when the airbag inflates in an automobile accident, each of the inflatable cavities after inflation expands to form an inflatable support part, and the inflatable support part can support the buffer fabric piece, so that the buffer fabric piece connected between the two inflatable cavities expands under the support of the inflatable support part to form a support position corresponding to the part of the human body to be protected. That is, when the buffer fabric expands under the support of the inflatable support part, it is exactly opposite to the part of the human body to be protected. The material of the buffer fabric is relatively soft and there is no impact force given by the gas. Therefore, when the buffer fabric contacts the part of the human body to be protected, there will be no impact force formed by the gas to impact the part of the human body to be protected, thereby reducing the impact on the passenger when the airbag body expands and avoiding harm to the passenger when the airbag expands. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of an airbag provided by an embodiment of the present application.

[0026] Figure 2 is a schematic structural diagram of an airbag provided by an embodiment of the present application in contact with the knee.

[0027] Figure 3 is Figure 2 a cross-sectional view of

[0028] Figure 4 is a schematic structural diagram of another airbag provided by an embodiment of the present application in contact with the knee.

[0029] Figure 5 isFigure 4 Cross-sectional view.

[0030] Figure 6 It is a schematic structural view of another angle of the airbag in contact with the knee provided by the embodiment of the present application.

[0031] Figure 7 It is a schematic structural view of another airbag provided by the embodiment of the present application.

[0032] Reference numerals:

[0033] Airbag body 10, gas generator 20, buffer fabric piece 30, inflatable cavity 40, inflatable deployment branch 50, first connection part 60, second connection part 70, knee 80, first end 100, second end 200. Detailed implementation manners

[0034] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementations disclosed below.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In the related art, when a vehicle accident occurs, the gas generator inflates and deploys the airbag to protect the safety of the passengers. However, when the air pressure in the inflatable cavity of the airbag is too high, if the inflatable cavity comes into direct contact with the passengers, the deployed inflatable cavity is likely to hit the passengers and cause harm to them.

[0038] In view of this, the present application provides an airbag, which includes: an airbag body and a gas generator; the airbag body includes a buffer fabric piece and at least two inflatable cavities; the first ends 100 of the at least two inflatable cavities are convergently arranged to form the inflatable end of the airbag body, and the portions of the inflatable cavities other than the first ends 100 form the inflatable support part of the airbag body; each buffer fabric piece is connected between two of the inflatable cavities, and the buffer fabric piece has a size corresponding to the part of the human body to be protected; the gas generator is arranged at the inflatable end of the airbag body and can inflate each of the inflatable cavities through the inflatable end of the airbag body. After inflation, each of the inflatable cavities unfolds to form the inflatable support part, and the buffer fabric piece connected between the two inflatable cavities unfolds under the support of the inflatable support part to form a support position corresponding to the part of the human body to be protected.

[0039] It can be understood that for the airbag provided by the present application, when the airbag inflates during a vehicle accident, each of the inflated inflatable cavities unfolds to form an inflatable support part, which can support the buffer fabric piece, so that the buffer fabric piece connected between the two inflatable cavities unfolds under the support of the inflatable support part to form a support position corresponding to the part of the human body to be protected. That is, when the buffer fabric unfolds under the support of the inflatable support part, it is exactly opposite to the part of the human body to be protected. The material of the buffer fabric is soft and there is no impact force from the gas, so that when the buffer fabric contacts the part of the human body to be protected, there is no impact force from the gas to impact the part of the human body to be protected, thereby reducing the impact on the passenger when the airbag body unfolds and avoiding harm to the passenger when the airbag unfolds.

[0040] Next, the airbag provided by the present application will be described in detail with reference to the accompanying drawings.

[0041] Figure 1 is a schematic structural diagram of an airbag provided by an embodiment of the present application. Figure 2 is a schematic structural diagram of an airbag provided by an embodiment of the present application in contact with the knee. Figure 3 is Figure 2 a cross-sectional view. Figure 4 is a schematic structural diagram of another airbag provided by an embodiment of the present application in contact with the knee. Figure 5 is Figure 4 a cross-sectional view. Figure 6 is a schematic structural diagram of the airbag provided by an embodiment of the present application in contact with the knee from another angle. Figure 7 is a schematic structural diagram of yet another airbag provided by an embodiment of the present application.

[0042] Such as Figures 1 to 7As shown in the figure, the present application provides an airbag, which includes an airbag body 10, a gas generator 20, a housing 201, and a cover 202.

[0043] Among them, the airbag body 10 includes a buffer fabric piece 30 and at least two inflatable cavities 40. The fabrics used for the buffer fabric piece 30 and the inflatable cavities 40 are usually made of highly elastic materials, specifically, generally nylon or polyester fiber fabrics, etc. This material has high elasticity and impact resistance, and can withstand the impact force generated by the vehicle during a collision, effectively protecting the safety of the vehicle occupants. After the inflatable cavity 40 is inflated, the inflatable cavity 40 will expand under the action of air pressure to form a buffer structure for lifting the human body, so as to protect the passengers and avoid them from being injured when an accident occurs to the vehicle. The inflatable cavity 40 of the embodiment of the present application will expand under the action of air pressure and preferentially form an inflatable support portion for supporting the buffer fabric piece 30.

[0044] In this embodiment, the first ends 100 of at least two of the inflatable cavities 40 converge and are arranged to form the inflatable end of the airbag body 10. The inflatable end of the airbag body 10 is mainly used to supply gas to each of the inflatable cavities 40. Specifically, gas inflation requires a gas generator 20. The gas generator 20 is arranged at the inflatable end of the airbag body 10, and can inflate each of the inflatable cavities 40 through the inflatable end of the airbag body 10.

[0045] In this embodiment, air inlets are provided on the first ends 100 of the inflatable cavities 40 located at the inflatable end of the airbag body 10. Each air inlet is responsible for inputting the gas generated by the gas generator 20 into the corresponding inflatable cavity 40 from the air inlet. Specifically, in one example, the first ends 100 of each of the inflatable cavities 40 form a common air storage space at the inflatable end of the airbag body 10. An air delivery communication port is provided on the cavity wall forming the air storage space. The gas generator 20 supplies gas to the air storage space through this air delivery communication port. The air inlets of each of the inflatable cavities 40 are respectively communicated with the air storage space, and then the gas in the air storage space can be delivered to each of the inflatable cavities 40. Of course, in another example, the air inlets of each of the inflatable cavities 40 can be directly connected to the gas generator 20, and then when the gas generator 20 generates gas, the gas generated by the gas generator 20 can be directly delivered to each of the inflatable cavities 40.

[0046] In one example, the gas generator 20 can receive a detonation signal to react, so that the gas rushes out of the gas generator 20 and fills the inflatable end, and then the gas is correspondingly delivered to each of the inflatable cavities 40.

[0047] The portions of the respective inflatable cavities 40 other than the first end portions 100 constitute the inflatable support portion of the airbag body 10. The inflatable support portion can be inflated to each of the inflatable cavities 40 through the inflatable end portion of the airbag body 10. After inflation, each of the inflatable cavities 40 expands to form the inflatable support portion. The inflatable support portion of the airbag body 10 is the main shaping and supporting portion of the airbag body 10 after inflation.

[0048] Each of the buffer cloth pieces 30 is connected between two of the inflatable cavities 40, and the buffer cloth piece 30 has a size corresponding to the body part to be protected. The buffer cloth piece 30 connected between two of the inflatable cavities 40 expands under the support of the inflatable support portion to form a support position corresponding to the body part to be protected. When the buffer cloth expands under the support of the inflatable support portion, it exactly faces the body part to be protected. The material of the buffer cloth is relatively soft and there is no impact force given by the gas, so that when the buffer cloth contacts the body part to be protected, there is no impact force formed by the gas to impact the body part to be protected, thereby reducing the impact on the passenger when the airbag body 10 expands and avoiding harm to the passenger when the airbag deploys. In this embodiment, the body part to be protected is the knee 80.

[0049] Further, as Figures 1 to 3 shown, the at least two inflatable cavities 40 include three inflatable cavities 40, and the buffer cloth pieces 30 include two buffer cloth pieces 30. The three inflatable cavities 40 are arranged side by side, and one buffer cloth piece 30 is connected between every two adjacent inflatable cavities 40. After the three inflatable cavities 40 are inflated to form the inflatable support portion, the buffer cloth pieces 30 connected between adjacent two inflatable cavities 40 respectively expand under the support of the inflatable support portion to form support positions corresponding to the human knees.

[0050] Specifically, the three inflatable cavities 40 are arranged side by side, and the first end portions 100 of the three inflatable cavities 40 converge and are arranged to constitute the inflatable end portion of the airbag body 10. At this time, the morphological structure formed by the three inflatable cavities 40 is approximately in the shape of a "mountain". The first end portions 100 of the three inflatable cavities 40 form a common air storage space at the inflatable end portion of the airbag body 10. An air delivery communication port is provided on the cavity wall constituting the air storage space, and the gas generator 20 delivers gas to the air storage space through the air delivery communication port. The air inlets of the three inflatable cavities 40 are respectively communicated with the air storage space, and then the gas in the air storage space can be delivered to each inflatable cavity 40.

[0051] In one example, after each of the inflatable cavities 40 is deployed to form an inflatable support portion, the inflatable support portions are isolated from each other except at the inflatable ends. That is to say, only the first ends 100 of the three inflatable cavities 40 are connected at the inflatable end of the airbag body 10. After the gas enters the inflatable cavity 40 through the air inlet of each inflatable cavity 40, it can only stay in each inflatable cavity 40.

[0052] The three inflatable cavities 40 have the same structural form, and one of the inflatable cavities 40 will be specifically described below.

[0053] Specifically, the structure of at least one of the inflatable cavities 40 expands from the first end 100 to two inflatable expansion branches 50 towards the distal end, and converges and communicates at the second end 200 extending to the distal end. The two inflatable expansion branches 50 are configured to form the inflatable support portion. Wherein, the second end 200 at the distal end is the end opposite to the first end 100. After each of the inflatable cavities 40 is deployed to form an inflatable support portion, the outer contour shape of the inflatable support portion conforms to the space contour provided at the installation position.

[0054] Furthermore, in this embodiment, the inflatable cavity 40 is specifically a columnar structure surrounded by an airbag wall. The airbag wall has high strength and durability and can withstand the impact force generated when the vehicle collides. Corresponding to the two inflatable expansion branches 50 of the inflatable cavity 40, the columnar inflatable cavity 40 includes a main columnar cavity and a branch columnar cavity that communicate with each other. That is, the main columnar cavity is located at the first end 100 of the inflatable cavity 40, and the main columnar cavity expands towards the distal end into two branch columnar cavities. The two branch columnar cavities converge and communicate at the second end 200 extending to the distal end. When inflating, the main columnar cavity is first filled with gas, and then the gas in the main columnar cavity is respectively transported to the two branch columnar cavities.

[0055] In one example, the morphological structures of the three inflatable cavities 40 arranged side by side can be different. Specifically, the structures of the inflatable cavities 40 located on both sides adopt the following form: the structure of the inflatable cavity 40 expands from the first end 100 to two inflatable expansion branches 50 towards the distal end, and converges and communicates at the second end 200 extending to the distal end. The two inflatable expansion branches 50 are configured to form the inflatable support portion; the structure of the inflatable cavity 40 located in the middle adopts the following form: the structure of the inflatable cavity 40 extends from the first end 100 to the second end 200 at the distal end, forming the plate-shaped inflatable support portion located at the middle position of the airbag body 10.

[0056] A buffer cloth piece 30 is connected between every two adjacent inflation cavities 40. After the three inflation cavities 40 are inflated to form the inflation support part, the buffer cloth pieces 30 connected between every two adjacent inflation cavities 40 are respectively unfolded under the support of the inflation support part to form support positions corresponding to the human knees. In this example, the shape of the airbag body 10 formed by the corresponding connection of the buffer cloth piece 30 and the inflation cavity 40 is approximately "banana"-shaped.

[0057] In this embodiment, as Figure 4 and Figure 5 shown, after each inflation cavity 40 is unfolded and forms an inflation support part, there is a communicating part communicating with each other between adjacent inflation support parts except for the inflation ends. The communicating part is close to the part of the human body to be protected, and the channel of the communicating part is perpendicular to the extension direction of the inflation support part. Specifically, based on three inflation cavities 40 arranged side by side, which can be called the left inflation cavity 40, the middle inflation cavity 40, and the right inflation cavity 40, there are two corresponding communicating parts, namely the first communicating part 60 and the second communicating part 70 respectively. Among them, the first communicating part 60 communicates with the left inflation cavity 40 and the middle inflation cavity 40, the second communicating part 70 communicates with the middle inflation cavity 40 and the right inflation cavity 40, and the first communicating part 60 communicates with the second communicating part 70 through the middle inflation cavity 40.

[0058] In one example, the first communicating part 60 and the second communicating part 70 can each be set to one and are arranged perpendicular to the extension direction of the inflation support part. In one example, the first communicating part 60 and the second communicating part 70 can each be set to multiple, and multiple first communicating parts 60 or multiple second communicating parts 70 are arranged side by side in the extension direction of the inflation support part, and then form channels communicating with multiple first communicating parts 60 and second communicating parts 70.

[0059] Setting a communicating part between the inflation cavities 40 can realize the connection between the inflation cavities 40, enable the gas to flow quickly between the inflation cavities 40, and thus quickly fill each inflation cavity 40. In addition, setting a communicating part between the inflation cavities 40 enables the communicating part to form a support between adjacent inflation cavities 40 after the gas is introduced, thereby improving the support stability of the inflation cavities 40.

[0060] As above is the airbag body 10 composed of the three inflation cavities 40 and the two buffer cloth pieces 30, that is, the three inflation cavities 40 are arranged side by side, and a buffer cloth piece 30 is connected between every two adjacent inflation cavities 40. Each inflation cavity 40 can form the inflation support part after inflation and support the two buffer cloth pieces 30, so that each buffer cloth piece 30 faces each single leg (such as Figure 2 、 Figure 4 and Figure 6As shown, and each buffer cloth piece 30 is not filled with gas, so that when contacting the leg, it will not apply gas pressure to the leg, thereby reducing the impact force of the gas on the leg, and further reducing the harm of the inflatable cavity 40 to the passenger.

[0061] In another example of the present application, as Figure 7 shown, the at least two inflatable cavities 40 include two inflatable cavities 40, and the buffer cloth piece 30 includes one buffer cloth piece 30. The two inflatable cavities 40 are arranged side by side, and the buffer cloth piece 30 is connected between two adjacent inflatable cavities 40. After the two inflatable cavities 40 are inflated to form the inflatable support portion, the buffer cloth pieces 30 connected between two adjacent inflatable cavities 40 are respectively unfolded under the support of the inflatable support portion to form a support position corresponding to the human knee.

[0062] Relative to the above-mentioned at least two inflatable cavities 40 including three inflatable cavities 40, the buffer cloth piece 30 includes two buffer cloth pieces 30. The number of the inflatable cavities 40 and the buffer cloth pieces 30 in this embodiment are respectively reduced by one. However, the structural form of a single inflatable cavity 40 does not change. For the specific structural description, reference can be made to the description in the above embodiment, which will not be repeated here. What changes in form is that the area of the buffer cloth piece 30 becomes larger, and the area of the buffer cloth piece 30 can cover the knees 80 (both legs).

[0063] In this embodiment, in one structure, after the two inflatable cavities 40 are unfolded and form the inflatable support portion, except for the inflatable ends, the two inflatable support portions are isolated from each other. In another structure, after the two inflatable cavities 40 are unfolded and form the inflatable support portion, except for the inflatable ends, there is a communicating portion that communicates with each other between adjacent inflatable support portions. The communicating portion can be set to at least one. When multiple communicating portions are provided, the multiple communicating portions are distributed along the extension direction of the inflatable support portion.

[0064] In one example, the at least two inflatable cavities 40 include more than three inflatable cavities 40, and the buffer cloth piece 30 includes more than two buffer cloth pieces 30.

[0065] The present application provides an airbag, which includes: an airbag body 10 and a gas generator 20; the airbag body 10 includes a buffer fabric piece 30 and at least two inflatable cavities 40; the first ends 100 of at least two of the inflatable cavities 40 converge and are arranged to form the inflatable end of the airbag body 10, and the portions of the inflatable cavities 40 other than the first ends 100 form the inflatable support portion of the airbag body 10; each buffer fabric piece 30 is connected between two of the inflatable cavities 40, and the buffer fabric piece 30 has a size corresponding to the part of the human body to be protected; the gas generator 20 is arranged at the inflatable end of the airbag body 10 and can inflate each of the inflatable cavities 40 through the inflatable end of the airbag body 10. After inflation, each of the inflatable cavities 40 expands to form the inflatable support portion, and the buffer fabric piece 30 connected between two of the inflatable cavities 40 expands under the support of the inflatable support portion to form a support position corresponding to the part of the human body to be protected.

[0066] For the airbag provided by the present application, when the airbag inflates during a vehicle accident, each of the inflatable cavities 40 after inflation expands to form an inflatable support portion, and the inflatable support portion can support the buffer fabric piece 30, so that the buffer fabric piece 30 connected between two of the inflatable cavities 40 expands under the support of the inflatable support portion to form a support position corresponding to the part of the human body to be protected. That is, when the buffer fabric expands under the support of the inflatable support portion, it is exactly opposite to the part of the human body to be protected. The material of the buffer fabric is relatively soft and there is no impact force from the gas. Therefore, when the buffer fabric contacts the part of the human body to be protected, there is no impact force from the gas to impact the part of the human body to be protected, thereby reducing the impact on the passenger when the airbag body 10 expands and avoiding injury to the passenger when the airbag expands.

[0067] The present application further provides a vehicle, which includes the above-mentioned airbag, specifically as follows:

[0068] An embodiment of the present application further provides a vehicle, which includes the above-mentioned airbag, and the airbag includes:

[0069] Airbag body and gas generator; the airbag body includes a buffer fabric sheet and at least two inflatable cavities; the first ends 100 of the at least two inflatable cavities are convergently arranged to form the inflatable end of the airbag body, and the portions of the inflatable cavities other than the first ends 100 form the inflatable support portion of the airbag body; each buffer fabric sheet is connected between two of the inflatable cavities, and the buffer fabric sheet has a size corresponding to the body part to be protected; the gas generator is arranged at the inflatable end of the airbag body and can inflate each of the inflatable cavities through the inflatable end of the airbag body. After inflation, each of the inflatable cavities unfolds to form the inflatable support portion, and the buffer fabric sheet connected between two of the inflatable cavities unfolds under the support of the inflatable support portion to form a support position corresponding to the body part to be protected.

[0070] The specific implementation of the airbag in this embodiment is analogous to that of the airbag in the above embodiment. For specific details, refer to the relevant content of the above embodiment, and no redundant description will be given here.

[0071] It should be noted that although several structures, components or units for implementing related functions are mentioned in the above detailed description, this division is not mandatory. In fact, according to the specific implementation of the present application, the features and functions of the 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 and embodied by multiple components, structures or units.

[0072] In addition, although the components of the component or device in the present application and the installation manner between the components are described in a specific order in the drawings, this does not require or imply that the component or device must be designed according to this specific component or the installation manner between the components, or that all the shown components must be included to achieve the desired result. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve the corresponding function, and / or one component can be decomposed into multiple components to achieve the corresponding function, etc.

[0073] Although the present application is disclosed above with preferred embodiments, it is not used to limit the present application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by the claims of the present application.

Claims

1. A safety airbag, characterized in that: The safety airbag comprises: an airbag body and a gas generator; The airbag body includes a cushioning cloth sheet and at least two inflation cavities; The first ends of at least two of the inflatable cavities are converged and arranged to form the inflatable end of the airbag body, and the portion of each of the inflatable cavities except the first end constitutes the inflatable support portion of the airbag body; Each of the buffer cloth pieces is connected between the two inflatable cavities, and the buffer cloth piece has a size corresponding to the part of the human body to be protected; The gas generator is arranged at the inflation end of the airbag body, and can inflate each of the inflation cavities through the inflation end of the airbag body. After inflation, each of the inflation cavities unfolds and forms the inflation support part. The buffer cloth piece connected between the two inflation cavities unfolds under the support of the inflation support part to form a support position corresponding to the part of the human body to be protected.

2. The airbag according to claim 1, characterized in that: The human body part to be protected is a knee; the at least two inflatable cavities include three inflatable cavities, and the buffer cloth sheet includes two buffer cloth sheets; The three inflatable cavities are arranged side by side, and a buffer cloth sheet is connected between every two adjacent inflatable cavities; After the three inflatable cavities are inflated to form the inflatable support portion, the buffer cloth pieces connected between two adjacent inflatable cavities are respectively unfolded under the support of the inflatable support portion to form a support position corresponding to the human knee.

3. The airbag according to claim 1, characterized in that: After the inflatable cavities are expanded to form inflatable support parts, the inflatable support parts are isolated from each other except for the inflatable ends.

4. The airbag according to claim 1, characterized in that: After each of the inflatable cavities is expanded to form an inflatable support portion, adjacent inflatable support portions have interconnected communication portions except for the inflatable end portions.

5. The airbag according to claim 4, characterized in that: The connecting portion is close to the part of the human body to be protected, and the cavity of the connecting portion is perpendicular to the extending direction of the inflatable support portion.

6. The airbag according to claim 1, characterized in that: The structure of at least one of the inflatable cavities expands from the first end to the distal end into two inflatable expansion branches, and merges and connects at the second end extending to the distal end. The two inflatable expansion branches form the inflatable support portion.

7. The airbag according to claim 1, characterized in that: After each of the inflatable cavities is expanded to form an inflatable support portion, the outer contour of the inflatable support portion is consistent with the spatial contour provided by the installation position.

8. The airbag according to claim 2, characterized in that: The structure of the inflation cavity located on both sides is as follows: the structure of the inflation cavity expands from the first end to the distal end into two inflation expansion branches, and merges and is connected at the second end extending to the distal end, and the two inflation expansion branches form the inflation support part; the structure of the inflation cavity located in the middle is as follows: the structure of the inflation cavity extends from the first end to the distal end to the second end at the distal end, forming the plate-shaped inflation support part located in the middle position of the airbag body.

9. A car, characterized in that: Comprising the airbag as described in any one of claims 1-8.

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