Airbag for vehicle

Abstract

An airbag for a vehicle, comprising: a main cavity air bag (6), which is used for coming into contact with the positions of the head, neck, and chest of a front-seat passenger when being inflated; a support structure, which is used for supporting the main cavity air bag (6) once the main cavity air bag (6) has been inflated; and a gas generator (11), which is mounted in a ceiling (4) of the vehicle and is communicated with the main cavity air bag (6) for inflating the main cavity air bag (6).

Description

An automobile safety air bag

[0001] The present application claims priority to the Chinese patent application No. 202410991614.4, filed on July 23, 2024, and entitled "An automobile safety air bag", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of automobile accessories, in particular to an automobile safety air bag. BACKGROUND

[0003] With the rapid development of the automobile industry, automobiles have become an indispensable means of transportation in people's daily life. However, the frequent occurrence of traffic accidents poses a serious threat to the safety of passengers. In order to improve the safety of automobiles and reduce casualties in traffic accidents, safety air bags have emerged as an important passive safety device.

[0004] Generally, a safety air bag is composed of an air bag and a gas generator. When a car collides, the gas generator generates gas and passes the gas into the air bag, causing the air bag to expand. The expanded air bag wraps around the front passenger, thereby protecting the front passenger.

[0005] However, after the air bag expands, there is a large space between the main cavity air bag, the front windshield, and the instrument panel, so the main cavity air bag is prone to deformation towards this space, affecting the protection effect on the front passenger.

[0006] SUMMARY

[0007] The purpose of the present application is to provide an automobile safety air bag that can quickly deploy the safety air bag to protect the passenger and at the same time can limit and support the position of the safety air bag, further increasing the protection effect of the safety air bag on the passenger.

[0008] The automobile safety air bag provided by the present application adopts the following technical solution:

[0009] An automobile safety air bag, comprising:

[0010] a main cavity air bag, which is used to contact the head, neck, and chest position of the front passenger after expansion;

[0011] a support structure, which is used to support the main cavity air bag after the main cavity air bag expands;

[0012] a gas generator, which is installed in the automobile roof and communicates with the main cavity air bag for inflating the main cavity air bag.

[0013] By adopting the technical scheme, when the front-row passenger collides against the main cavity air bag under the impact force, the main cavity air bag is easy to deform towards the space between the front windshield and the instrument panel, affecting the protection effect on the front-row passenger. By arranging the support structure, the support structure supports the main cavity air bag after the main cavity air bag inflates, reduces the collapse of the main cavity air bag towards the space between the front windshield and the instrument panel, and thus increases the protection effect on the front-row passenger. Since the gas generator is in communication with the main cavity air bag, the main cavity air bag can inflate preferentially when the automobile collides, and thus protects the front-row passenger in the first time.

[0014] Optionally, the support structure is a secondary cavity air bag, which is in communication with the main cavity air bag and abuts against the front windshield and the instrument panel after inflation to support the main cavity air bag.

[0015] By adopting the technical scheme, when the main cavity air bag inflates to the position in communication with the secondary cavity air bag, the gas in the main cavity air bag flows into the secondary cavity air bag, so that the secondary cavity air bag inflates to support the main cavity air bag, thereby reducing the collapse of the main cavity air bag and further increasing the protection effect on the front-row passenger. By arranging the air bag, the impact on the front windshield is reduced, and the front windshield is buffered.

[0016] Optionally, the secondary cavity air bag comprises a first secondary cavity main piece and a second secondary cavity main piece, the first secondary cavity main piece and the second secondary cavity main piece are connected to each other by sewing and form a cavity for inflation between the first secondary cavity main piece and the second secondary cavity main piece, the second secondary cavity main piece is sewn on the main cavity air bag, a first perforation is formed in the second secondary cavity main piece, and the cavity is in communication with the main cavity air bag through the first perforation.

[0017] By adopting the technical scheme, the secondary cavity air bag is divided into the first secondary cavity main piece and the second secondary cavity main piece, so that the secondary cavity air bag is convenient to manufacture and convenient to connect to the main cavity air bag.

[0018] Optionally, the outer edges of the first secondary cavity main piece and the second secondary cavity main piece are connected to each other by sewing, and the area of the first secondary cavity main piece is greater than the area of the second secondary cavity main piece.

[0019] By adopting the technical scheme, since the area of the first secondary cavity main piece is greater than the area of the second secondary cavity main piece, the secondary cavity air bag forms an air cushion with high sides and low middle after inflation, thereby reducing the damage caused by the direct impact of the main cavity air bag on the windshield glass and reducing the risk of windshield glass breaking.

[0020] Optionally, the main cavity air bag comprises a first main cavity main sheet, a second main cavity main sheet and a third main cavity main sheet, the second main cavity main sheet is sewn on the first main cavity main sheet, the third main cavity main sheet is sewn on the first main cavity main sheet and the second main cavity main sheet after folding the first main cavity main sheet and the second main cavity main sheet, and the first main cavity main sheet is folded and sewn with the first main cavity main sheet and the third main cavity main sheet.

[0021] By adopting the above technical scheme, the main cavity air bag is divided into the first main cavity main sheet, the second main cavity main sheet and the third main cavity main sheet, so that the manufacturing of the main cavity air bag is facilitated, and the first main cavity main sheet, the second main cavity main sheet and the third main cavity main sheet are connected through sewing, so that folding is facilitated at the sewing position, that is, the main cavity air bag is facilitated to be folded and placed in the automobile.

[0022] Optionally, the support structure is a pull belt, and at least one pull belt is arranged, one end of each pull belt is connected to the connection position of the first main cavity main sheet and the third main cavity main sheet, and the other end of each pull belt is connected to the connection position of the first main cavity main sheet and the second main cavity main sheet.

[0023] By adopting the above technical scheme, when the main cavity air bag is inflated, the pull belt is stretched to limit the shape of the inflated main cavity air bag, so that the main cavity corresponds to the head and chest position of the front-row passenger, and the front-row passenger is further protected.

[0024] Optionally, a first folding structure line is arranged on the first main cavity main sheet.

[0025] By adopting the above technical scheme, the first main cavity main sheet and the second main cavity main sheet are facilitated to be folded through the arrangement of the first folding structure line, and the folding position is facilitated to be positioned.

[0026] Optionally, a second folding structure line is arranged on the third main cavity main sheet.

[0027] By adopting the above technical scheme, the third main cavity main sheet is facilitated to be folded through the arrangement of the second folding structure line, and the folding position is facilitated to be positioned.

[0028] Optionally, a third folding structure line is arranged on the first main cavity main sheet.

[0029] By adopting the above technical scheme, the first main cavity main sheet is facilitated to be folded through the arrangement of the third folding structure line, and the folding position is facilitated to be positioned.

[0030] In summary, the present application has at least one of the following beneficial technical effects:

[0031] 1. When the front row passenger collides with the main cavity air bag under the impact force, the main cavity air bag is easy to deform towards the space between the main cavity air bag, the front windshield and the instrument panel due to the large space between the three, thereby affecting the protection effect on the front row passenger. By arranging the supporting structure, the supporting structure supports the main cavity air bag after the main cavity air bag expands, reduces the collapse of the main cavity air bag to the space between the front windshield and the instrument panel, thereby increasing the protection effect on the front row passenger. Since the gas generator is in communication with the main cavity air bag, the main cavity air bag can expand preferentially when the car collides, thereby protecting the front row passenger in the first time;

[0032] 2. By arranging the auxiliary cavity air bag, when the main cavity air bag expands to the communication position with the auxiliary cavity air bag, the gas in the main cavity air bag flows into the auxiliary cavity air bag, so that the auxiliary cavity air bag expands, thereby supporting the main cavity air bag, and further reducing the collapse of the main cavity air bag, and further increasing the protection on the front row passenger;

[0033] 3. Since the first auxiliary cavity main piece area is larger than the second auxiliary cavity main piece area, after the auxiliary cavity air bag expands, the auxiliary cavity air bag forms an air cushion with high sides and low middle, thereby reducing the damage caused by the direct impact of the main cavity air bag on the windshield glass, and reducing the risk of windshield glass breaking. BRIEF DESCRIPTION OF DRAWINGS

[0034] Fig. 1 is a structural schematic diagram of an automobile according to an embodiment of the present application.

[0035] Fig. 2 is a structural schematic diagram of a module shell according to an embodiment of the present application.

[0036] Fig. 3 is a parts drawing of the main cavity air bag and the auxiliary cavity air bag according to an embodiment of the present application.

[0037] Fig. 4 is a structural schematic diagram of the main cavity air bag and the auxiliary cavity air bag after expansion according to an embodiment of the present application.

[0038] Fig. 5 is a structural schematic diagram of the first main cavity main piece and the second main cavity main piece after lapping according to an embodiment of the present application.

[0039] Fig. 6 is a perspective structural schematic diagram of the first main cavity main piece and the second main cavity main piece after lapping and folding along the first folding structure line according to an embodiment of the present application.

[0040] Fig. 7 is a perspective structural schematic diagram of the first main cavity main piece, the second main cavity main piece and the third main cavity main piece after lapping according to an embodiment of the present application.

[0041] Fig. 8 is a perspective structural schematic diagram of the first main cavity main piece, the second main cavity main piece and the third main cavity main piece after lapping and folding along the second folding structure line according to an embodiment of the present application.

[0042] Fig. 9 is a perspective view of the first main cavity main sheet, the second main cavity main sheet and the third main cavity main sheet of the embodiment of the present application after being overlapped and folded along the third folding structure line.

[0043] Fig. 10 is a schematic view of the internal structure of the main cavity air bag and the auxiliary cavity air bag of the embodiment 2 of the present application after being inflated.

[0044] In the figures, 1 is a front windshield, 2 is an instrument panel, 3 is a roof, 4 is a roof panel, 41 is a weakening line, 5 is a sun visor, 6 is a main cavity air bag, 61 is a first main cavity main sheet, 611 is a first end, 612 is a second end, 62 is a second main cavity main sheet, 621 is a third end, 622 is a fourth end, 63 is a third main cavity main sheet, 631 is a fifth end, 632 is a sixth end, 633 is a second perforation, 64 is a first folding structure line, 65 is a second folding structure line, 66 is a third folding structure line, 7 is an auxiliary cavity air bag, 71 is a first auxiliary cavity main sheet, 72 is a second auxiliary cavity main sheet, 721 is a first perforation, 8 is a pull strap, 9 is a module housing, 91 is a connecting platform, 10 is a cross beam support, and 11 is a gas generator. DETAILED DESCRIPTION

[0045] The present application is further described in detail below with reference to Figs. 1-10.

[0046] Embodiment 1

[0047] An automobile, as shown in Figs. 1 and 2, includes a front windshield 1, an instrument panel, a roof 3, a roof panel 4 and a sun visor 5. The front windshield 1 and the instrument panel form a certain angle, the roof 3 is fixedly connected to the top end of the front windshield 1, the sun visor 5 is rotatably connected to the bottom surface of the roof panel 4, a gap is provided between the roof panel 4 and the roof 3, a module housing 9 is installed in the gap, and a safety air bag is installed in the module housing 9. When the automobile collides, the safety air bag inflates and pops out of the module housing 9, and wraps the front-row passenger, thereby reducing the injury of the front-row passenger.

[0048] Further, in order to facilitate the popping out of the safety air bag, a weakening line 41 is provided at one end of the roof panel 4 close to the front windshield 1. When the safety air bag inflates and pops out, the front end of the roof panel 4 folds along the weakening line 41, thereby facilitating the popping out of the safety air bag and enabling the safety air bag to further wrap the front-row passenger. In this embodiment, the weakening line 41 can be composed of a groove provided along the width direction of the roof panel 4, and in other embodiments, it can also be composed of a plurality of through holes uniformly and regularly provided along the width direction of the roof panel 4, as long as it can facilitate the folding of the roof panel 4 along the weakening line 41.

[0049] Specifically, a cross beam support 10 is arranged in the gap, the cross beam support 10 is fixedly connected to the roof 3, and the module shell 9 is fixedly connected to the cross beam support 10 through bolts; specifically, two mutually symmetrical connecting platforms 91 are arranged on the top surface of the module shell 9, when the module shell 9 is installed, the connecting platforms 91 are tightly attached to the cross beam support 10, and the connecting platforms 91 are fixed to the cross beam support 10 through bolts, so that the installation of the module shell 9 is completed.

[0050] The airbag includes a main cavity air bag 6 and a gas generator 11, the gas generator 11 is installed in the main cavity air bag 6, one end of the gas generator 11 extends out of the main cavity air bag 6 and is fixedly connected to the module shell 9 through bolts, when the car is hit, the gas generator 11 operates, the main cavity air bag 6 is inflated, the main cavity air bag 6 is expanded, and the front-row passenger is wrapped, so that the situation that the front-row passenger is inclined forward and hits the front windshield 1 or the instrument panel due to the impact of the car is reduced.

[0051] Further, the airbag further includes a support structure, when the main cavity air bag 6 supports the front-row passenger, the front-row passenger will hit the main cavity air bag 6 under the action of the impact force, because there is a large space among the main cavity air bag 6, the front windshield 1 and the instrument panel, the main cavity air bag 6 is easy to deform towards the space, which affects the protection effect on the front-row passenger, by arranging the support structure, after the main cavity air bag 6 is expanded, the support structure supports the main cavity air bag 6, the support structure is specifically used for supporting the main cavity air bag 6 from the outside of the main cavity air bag 6, which reduces the collapse of the main cavity air bag 6 to the space between the front windshield 1 and the instrument panel, thereby increasing the protection effect on the front-row passenger. And in this embodiment, because the gas generator 11 is installed in the main cavity air bag 6, when the car is hit, the main cavity air bag is first expanded, which first protects the front-row passenger, and then the support structure supports the main cavity air bag, which increases the protection effect on the front-row passenger, thereby increasing the safety of the front-row passenger as a whole.

[0052] Specifically, the support structure adopts a secondary cavity air bag 7, the secondary cavity air bag 7 is communicated with the main cavity air bag 6, when the main cavity air bag 6 is expanded, gas flows from the main cavity air bag 6 into the secondary cavity air bag 7, so that the secondary cavity air bag 7 is expanded, thereby making the secondary cavity air bag 7 abut against the front windshield 1 and the instrument panel, so that the secondary cavity air bag 7 supports the main cavity air bag 6, thereby reducing the collapse of the main cavity air bag 6 to the space between the front windshield 1 and the instrument panel, thereby further increasing the protection effect of the airbag on the front-row passenger.

[0053] Referring to FIGS. 3-9, the main cavity air bag 6 includes a first main cavity main sheet 61, a second main cavity main sheet 62, and a third main cavity main sheet 63. The first main cavity main sheet 61 has a first end 611 and a second end 612. The second main cavity main sheet 62 has a third end 621 and a fourth end 622. The third main cavity main sheet 63 has a fifth end 631 and a sixth end 632. The second main cavity main sheet 62 is superimposed on the first main cavity main sheet 61, and the third end 621 of the second main cavity main sheet 62 and the first end 611 of the first main cavity main sheet 61 are overlapped and sewn together by a thread.

[0054] The first main cavity main sheet 61 has a first folding structure line 64. The first main cavity main sheet 61 and the second main cavity main sheet 62 are folded by 180 degrees along the first folding structure line 64. Then, the third main cavity main sheet 63 is superimposed on the second main cavity main sheet 62, and the fifth end 631 and the fourth end 622 are superimposed and sewn together by a thread.

[0055] The third main cavity main sheet 63 has a second folding structure line 65, and the first main cavity main sheet 61 has a third folding structure line 66. The third main cavity main sheet 63 is folded by 180 degrees along the second folding structure line 65. Then, the first main cavity main sheet 61 is folded by 180 degrees along the third folding line. After the folding is completed, the periphery of the main cavity air bag 6 is sewn together by a thread, thereby forming the main cavity air bag 6.

[0056] Specifically, the first folding structure line 64 can be sewn on the first main cavity main sheet 61 by a thread, used for indicating the folding position. The second folding structure line 65 can also be sewn on the third main cavity main sheet 63 by a thread, used for indicating the folding position. The third folding structure line 66 can also be sewn on the first main cavity main sheet 61 by a thread, used for indicating the folding position. In other embodiments, the first folding structure line 64, the second folding structure line 65, and the third folding structure line 66 can also be creases, as long as they can facilitate the installer to position and fold.

[0057] The auxiliary cavity air bag 7 includes a first auxiliary cavity main sheet 71 and a second auxiliary cavity main sheet 72. The first auxiliary cavity main sheet 71 is superimposed on the second auxiliary cavity main sheet 72 and is sewn together with the second auxiliary cavity main sheet 72. An air cavity for inflation is formed between the first auxiliary cavity main sheet 71 and the second auxiliary cavity main sheet 72. The second auxiliary cavity main sheet 72 is sewn on the main cavity air bag 6. Specifically, the second auxiliary cavity main sheet 72 is sewn on the third main cavity main sheet 63. The second auxiliary cavity main sheet 72 has a first perforation 721, and the third main cavity main sheet 63 has a second perforation 633. The first perforation 721 and the second perforation 633 are positionally corresponding. When the main cavity air bag 6 is inflated, the gas flows into the air cavity through the first perforation 721 and the second perforation 633, thereby inflating the auxiliary cavity air bag 7 and supporting the main cavity air bag 6.

[0058] Further, the outer edge of the first sub-cavity main piece 71 is connected to the outer edge of the second sub-cavity main piece 72 by sewing, the area of the first sub-cavity main piece 71 is larger than the area of the second sub-cavity main piece 72, when the sub-cavity air bag 7 is stacked, the first sub-cavity main piece 71 is folded and placed on the second sub-cavity main piece 72, after the sub-cavity air bag 7 is inflated, the sub-cavity air bag 7 forms an air cushion with high sides and low middle, thereby reducing the damage caused by the direct impact of the main cavity air bag 6 on the windshield, and reducing the risk of windshield breakage.

[0059] The implementation principle of the embodiment 2 is that when the automobile collides, the gas generator 11 operates at this time, a large amount of gas fills in the main cavity air bag 6, the main cavity air bag 6 is inflated, in the process of inflation of the main cavity air bag 6, the roof 4 is folded along the weakened part, so that the main cavity air bag 6 breaks out of the roof 4 and starts to expand along the front windshield 1 and the passenger side, when the main cavity air bag 6 expands to the communication position of the sub-cavity air bag 7, the gas flows into the sub-cavity air bag 7, the sub-cavity air bag 7 is filled, the sub-cavity air bag 7 is inflated and clamped in the middle of the main cavity and the front windshield 1, the support of the main cavity air bag 6 is realized, and the impact of the main cavity on the windshield is reduced, when the main cavity air bag 6 is completely expanded, the front row passengers are wrapped in a large area, thereby directly protecting the front row passengers.

[0060] Embodiment 2:

[0061] The embodiment 2 is substantially the same as the structure of the embodiment 1, and the difference is the different support structure.

[0062] Referring to FIG. 10, the support structure is a pull belt 8, and the pull belt 8 is provided at least one, one end of each pull belt 8 is connected at the connection position of the first main cavity main piece 61 and the third main cavity main piece 63, and the other end of each pull belt 8 is connected at the connection position of the first main cavity main piece 61 and the second main cavity main piece 62.

[0063] In the embodiment, the pull belt 8 is provided as two, one is provided on each side of the main cavity air bag 6, in other embodiments, the number of pull belts 8 can be provided as an even number, the pull belts 8 are provided as two groups, and the two groups of pull belts 8 are distributed on the two sides of the main cavity air bag 6.

[0064] The implementation principle of the embodiment 2 is that when the main cavity air bag 6 is inflated, the pull belt 8 expands together with the inflation of the main cavity air bag 6, the pull belt 8 controls the shape of the main cavity, ensures that the main cavity is in the head and chest position of the front row passengers after inflation, thereby protecting the head and chest position of the front row passengers, and further improving the protection of the front row passengers.

[0065] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automotive airbag, characterized by, The utility model relates to an airbag for automobile, which comprises: a main cavity airbag (6) for contacting with the head, neck and chest of the front passenger after inflation; a supporting structure for supporting the main cavity airbag (6) after inflation; a gas generator (11) installed in the roof (4) of the automobile and communicating with the main cavity airbag (6) for inflating the main cavity airbag (6).

2. An automotive airbag according to claim 1, wherein The supporting structure is a secondary cavity airbag (7) communicating with the main cavity airbag (6) and abutting against the windshield (1) and the instrument panel after inflation for supporting the main cavity airbag (6).

3. An automotive airbag according to claim 2, wherein The secondary cavity airbag (7) comprises a first secondary cavity main piece (71) and a second secondary cavity main piece (72), the first secondary cavity main piece (71) and the second secondary cavity main piece (72) are connected with each other by sewing and form a cavity for inflation between the first secondary cavity main piece (71) and the second secondary cavity main piece (72), the second secondary cavity main piece (72) is sewn on the main cavity airbag (6), and a first perforation (721) is formed in the second secondary cavity main piece (72), the cavity communicates with the main cavity airbag (6) through the first perforation (721).

4. An automotive airbag according to claim 3, wherein The outer edges of the first secondary cavity main piece (71) and the second secondary cavity main piece (72) are connected with each other by sewing, and the area of the first secondary cavity main piece (71) is larger than that of the second secondary cavity main piece (72).

5. The automobile air bag according to claim 1, wherein The main cavity airbag (6) comprises a first main cavity main piece (61), a second main cavity main piece (62) and a third main cavity main piece (63), the second main cavity main piece (62) is sewn on the first main cavity main piece (61), the third main cavity main piece (63) is sewn on the first main cavity main piece (61) and the second main cavity main piece (62) after folding the first main cavity main piece (61) and the second main cavity main piece (62), and the first main cavity main piece (61) is folded and sewn with itself and the third main cavity main piece (63).

6. An automotive airbag according to claim 5, wherein The supporting structure is a pull belt (8), at least one pull belt (8) is arranged, one end of each pull belt (8) is connected to the connection position of the first main cavity main piece (61) and the third main cavity main piece (63), and the other end of each pull belt (8) is connected to the connection position of the first main cavity main piece (61) and the second main cavity main piece (62).

7. The automobile air bag according to claim 5, wherein A first folding structure line (64) is arranged on the first main cavity main piece (61).

8. The automotive airbag according to claim 5, wherein A second folding structure line (65) is arranged on the third main cavity main piece (63).

9. The automobile air bag according to claim 5, wherein A third folding structure line (66) is arranged on the first main cavity main piece (61).

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