Safety air bag

Abstract

The invention relates to the technical field of automobile accessories, in particular to an automobile safety air bag which comprises a main cavity piece, the left side and the right side of the main cavity piece extend outwards to be connected with convex hull parts, the convex hull parts are used for expanding during inflation, the main cavity piece is folded and sewn to form a main air bag, and the main air bag communicates with the convex hull parts; the two convex hull parts are used for protruding outwards relative to the main air bag and extending to a to-be-protected passenger when the safety air bag is inflated and expanded, so that the two convex hull parts are located on the two sides of the head of the to-be-protected passenger correspondingly, and therefore the head of the to-be-protected passenger is limited left and right to prevent the head from moving out of the air bag air bag. The main air bag is used for making contact with the head, neck and chest positions of the passenger to be protected when inflated and expanded. According to the safety air bag, the head of a passenger can be better prevented from sliding out of the safety air bag, and therefore the situation that the neck or the head is collided and damaged due to the fact that the head of the passenger deviates from the safety air bag can be better avoided.

Description

Technical Field

[0001] The present application relates to the technical field of automobile accessories, and in particular to a safety airbag. Background Art

[0002] Airbags can improve the safety of passengers in cars. They can provide additional protection for passengers by quickly inflating when the vehicle collides. Airbags usually include an airbag that is bag-shaped or spherical when inflated. When the car collides, the airbag is filled with gas and expands to a spherical structure, thereby providing cushioning protection for the passengers. In the event of a collision, especially an oblique collision or an offset collision, the passenger's head may slip out of the airbag and collide with other structures in the car, such as the central control screen, the door, the A-pillar, etc. As a result, the passenger's head may slip away from the airbag and cause neck or head collision injuries. Summary of the invention

[0003] The purpose of this application is to provide an airbag that can better prevent the occupant's head from slipping out of the airbag, thereby better preventing the occupant's head from deviating from the airbag and causing neck or head collision injuries. The specific solution is as follows:

[0004] In a first aspect, the present application provides an airbag, comprising:

[0005] A main cavity sheet, wherein the left and right sides of the main cavity sheet are respectively extended outwardly to be connected with convex hulls, the convex hulls are used to expand when inflated, the main cavity sheet is folded and sewn to form a main air bag, and the main air bag is connected to the convex hulls;

[0006] The two convex portions are used to protrude outwardly relative to the main airbag and extend toward the occupant to be protected when the safety airbag is inflated, so that the two convex portions are respectively located on both sides of the head of the occupant to be protected, thereby limiting the left and right positions of the head of the occupant to be protected and preventing the head from moving out of the airbag. The main airbag is used to contact the head, neck and chest of the occupant to be protected when inflated.

[0007] Optionally, left and right sides of the main cavity sheet are respectively extended outwardly to be connected with special-shaped cavity sheets, and the special-shaped cavity sheets are stacked and sewn along edges to form the convex portion.

[0008] Optionally, the special-shaped cavity sheet is a one-piece molding structure, the special-shaped cavity sheet and the main cavity sheet are an integrally molded structure, and the convex portion is formed by folding the special-shaped cavity sheet in half and sewing along the edge.

[0009] Optionally, the special-shaped cavity piece includes a first special-shaped cavity piece and a second special-shaped cavity piece;

[0010] The first special-shaped cavity sheet extends outward and is connected to the main cavity sheet. The first special-shaped cavity sheet and the main cavity sheet are an integrally formed structure. The second special-shaped cavity sheet and the first special-shaped cavity sheet are stacked and sewn together along the edge to form the convex portion.

[0011] Optionally, the convex hull portion is folded inward from the root relative to the main cavity sheet to overlap with the main cavity sheet, the main cavity sheets are overlapped to form a folded main air bag, the folded main air bag is sewn along the edge by a peripheral sewing structure to form the main air bag, the convex hull portion overlapped with the main cavity sheet is sewn together with the main cavity sheet by the peripheral sewing structure, so that the peripheral sewing structure forms a built-in sewing line for the convex hull portion;

[0012] The built-in sewing thread is used to apply inward restraint to the convex portion when the airbag is inflated, so that the convex portion gathers inward and extends toward the occupant to be protected.

[0013] Optionally, the airbag also includes a first auxiliary cavity piece and a second auxiliary cavity piece, and the first auxiliary cavity piece and the second auxiliary cavity piece are respectively sewn together with the main cavity piece to form the main airbag, the main cavity piece is used to form a first part of the main airbag that contacts the head, neck and chest of the occupant to be protected, and the first auxiliary cavity piece and the second auxiliary cavity piece are used to form a second part of the main airbag except the first part and the convex part.

[0014] Optionally, the second portion includes at least one of a side portion of the main airbag, a mounting portion of the main airbag, and a protruding portion of the main airbag.

[0015] Optionally, the main cavity sheet is a left-right symmetrical structure along the vertical direction, and the special-shaped cavity sheets on the left and right sides of the main cavity sheet are symmetrically arranged along the vertical center line of the main cavity sheet.

[0016] Optionally, when the safety airbag is inflated, the two convex portions and the main airbag form a V-shaped or horn-shaped structure.

[0017] In a second aspect, the present application further provides a car, comprising the safety airbag as described in any one of the first aspects.

[0018] Compared with the prior art, this application has the following advantages:

[0019] The safety airbag provided by the present application comprises a main cavity sheet, and the left and right sides of the main cavity sheet are respectively extended outwardly and connected with convex hulls, and the convex hulls can expand when inflated. The main cavity sheet can form a main airbag by folding and sewing. Since the main airbag is connected to the convex hulls, the main airbag can be inflated when the safety airbag needs to be opened, so that the main airbag gas flows to the convex hulls, so that the main airbag and the convex hulls can be inflated and expanded at the same time. The two convex hulls located on the left and right sides of the main cavity sheet are used to protrude outward relative to the main airbag and extend toward the occupant to be protected when the safety airbag is inflated, so that the two convex hulls are respectively located on both sides of the head of the occupant to be protected, thereby limiting the head of the occupant to be protected to the left and right to prevent the head from moving out of the airbag, and the main airbag is used to contact the head, neck and chest of the occupant to be protected when inflated.

[0020] It can be seen that the airbag provided in the present application can extend two convex portions on the main airbag toward the occupant when inflated. The two convex portions are located on both sides of the occupant's head, thereby preventing the occupant's head from slipping out of the airbag and better avoiding neck or head collision injuries caused by the occupant's head deviating from the airbag.

[0021] In addition, the present application connects the convex bulges to both sides of the main cavity sheet, which can more conveniently realize the provision of two convex bulges on the main airbag. The structure is simple and the sewing is convenient, which is more convenient for the sewing production of the safety airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an example of a car provided in an embodiment of the present application.

[0023] Figure 2 is a schematic structural diagram of an example of an airbag provided in an embodiment of the present application, wherein: Figure 2 (a) is a stereogram. Figure 2 (b) in the figure is the left view of (a).

[0024] Figure 3 It is a schematic diagram of the connection structure between the main cavity sheet and the convex bulge portion of the airbag provided in an embodiment of the present application.

[0025] Figure 4 This is an expanded view of a cavity sheet of an airbag provided in an embodiment of the present application.

[0026] Figure 5 It is a schematic diagram of the connection structure between the main cavity sheet and the special-shaped cavity sheet of the airbag provided in an embodiment of the present application.

[0027] Figure 6 It is a structural schematic diagram of a manufacturing process of an airbag provided in an embodiment of the present application.

[0028] Figure 7is through Figure 4 The schematic diagram of the structure of the airbag shown is composed of the cavity sheet of the airbag.

[0029] Figure 8 This is an expanded view of a cavity sheet of an airbag provided in an embodiment of the present application.

[0030] Fig. 9 is through Figure 8 The schematic diagram of the structure of the airbag shown is composed of the cavity sheet of the airbag.

[0031] In the figure, 1, front windshield; 2, instrument panel; 4, roof; 5, sun visor; 6, module shell; 7, airbag; 710, main cavity piece; 711, third folding structure line; 720: convex part; 721, special-shaped cavity piece; 721a, first special-shaped cavity piece; 721b: second special-shaped cavity piece; 722, special-shaped cavity sewing structure; 730, main airbag; 732, peripheral sewing structure; 733, second drawstring; 741, first auxiliary cavity piece; 741a, first sewing structure; 741b, first folding structure line; 742, second auxiliary cavity piece; 742a, second sewing structure; 742b, second folding structure line; 750, gas generator; 760, folding airbag; 8, occupant to be protected. DETAILED DESCRIPTION

[0032] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0033] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] The airbag can improve the safety of the passenger 8 when riding in the car. It can provide additional protection for the passenger by quickly inflating when the vehicle collides. The airbag usually includes an airbag that is in the shape of a bag or a ball when inflated. When the car collides, the airbag is filled with gas and expands to a spherical structure, thereby providing cushioning protection for the passenger 8. In the event of a collision, especially an oblique collision or an offset collision, the head of the passenger 8 may slip out of the airbag and collide with other structures in the car, such as the central control screen, the door, the A-pillar, etc. As a result, the head of the passenger 8 may slip away from the airbag and cause collision injuries to the neck or head.

[0036] In view of this, the present application provides an airbag and a car, wherein the provided airbag can better prevent the head of the occupant 8 from sliding out of the airbag, thereby better preventing the head of the occupant 8 from deviating from the airbag and causing neck or head collision injuries.

[0037] Next, the airbag provided by the present application will be described in detail with reference to the accompanying drawings.

[0038] like Figures 1 to 9 As shown, the airbag provided in the embodiment of the present application includes a main cavity sheet 710, and the left and right sides of the main cavity sheet 710 are respectively extended outward and connected with a convex portion 720, the convex portion 720 is used to expand when inflated, and the main cavity sheet 710 is formed into a main air bag 730 by folding and sewing, and the main air bag 730 is connected to the convex portion 720.

[0039] The two convex portions 720 are used to protrude outwardly relative to the main airbag 730 and extend toward the occupant to be protected 8 when the airbag is inflated, so that the two convex portions 720 are respectively located on both sides of the head of the occupant to be protected 8, thereby limiting the left and right positions of the head of the occupant to be protected 8 and preventing the head from moving out of the airbag. The main airbag 730 is used to contact the head, neck and chest of the occupant to be protected 8 when inflated.

[0040] The main cavity sheet 710 can be a long strip structure, a square structure, a special-shaped structure, etc., or other structures that can be sewn to form the main airbag 730. The main cavity sheet 710 can be an integral piece of cloth, or a spliced ​​piece of cloth formed by sewing multiple pieces of cloth. This application does not specifically limit this. Those skilled in the art can design the specific structure of the main cavity sheet 710 according to the specific structure of the airbag. In order to facilitate the sewing of the airbag, the main cavity sheet 710 can be set as a long strip structure so that the main airbag 730 can be better formed around it.

[0041] In the embodiment of the present application, the main airbag 730 can be formed only by folding and sewing the main cavity sheet 710. Specifically, when the structure of the main airbag 730 is relatively simple and can be conveniently formed by folding the main cavity sheet 710, the safety airbag can be formed by folding and sewing the main airbag 730 only by folding and sewing the main cavity sheet 710.

[0042] In practical applications, the main air bag 730 formed by folding and sewing only one main cavity sheet 710 is limited in structure and shape, and may not be able to form the desired air bag shape. It is also not easy to sew the main air bag 730 only by folding and sewing one main cavity sheet 710, and it often requires relatively complicated folding and sewing. Moreover, the sewn main air bag 730 may not be flat, and there is a lot of sewing margin. Therefore, in order to more conveniently form the safety air bag of the desired structure, and at the same time to make the sewn safety air bag flatter and reduce the sewing margin, in one embodiment, as Figure 2 , Figure 4 , Figure 8 As shown, the above-mentioned airbag may also include an auxiliary cavity sheet (the auxiliary cavity sheet in the figure includes a first auxiliary cavity sheet 741 and a second auxiliary cavity sheet 742), the auxiliary cavity sheet is sewn and connected with the main cavity sheet 710 to form a main airbag 730, the main cavity sheet 710 is used to form the first part of the main airbag 730 that contacts the head, neck and chest of the occupant 8 to be protected, and the auxiliary cavity sheet is used to form the second part of the main airbag 730 except the first part and the convex hull 720. The specific structure of the auxiliary cavity sheet and the connection form with the main cavity sheet 710 can be set according to the specific structure of the main airbag 730, and the present application does not specifically limit it. In the embodiment of the present application, the auxiliary cavity sheet can be sewn and connected with both the main cavity sheet 710 and the convex hull 720, or it can be sewn and connected only with the main cavity sheet 710, and the specific connection method is set according to the specific structure of the airbag.

[0043] The second portion may include at least one of a side portion of the main airbag 730, a mounting portion of the main airbag 730, and a protruding portion of the main airbag 730, but is not limited thereto. Figure 8 , Fig. 9 As shown, the second part formed by the auxiliary cavity sheet is the side part of the main air bag 730, as shown in FIG. Figure 4 , Figure 7As shown, the second part formed by the auxiliary cavity sheet is the installation part and the extension part of the main airbag 730, wherein the installation part is the part of the airbag used to be installed on the car, and the gas generator 750, the installation part, etc. can be provided in the installation part, so that the airbag can be installed in the car through the installation part, and the airbag is inflated by the gas generator 750; the extension part is used to make the airbag extend toward the occupant 8, and when the airbag is installed on the roof or other positions that are not directly facing the occupant 8, the extension part needs to be provided to extend the airbag directly opposite the occupant 8 by bending and extending. In this embodiment, the side part, the installation part or the extension part of the main airbag 730 are formed by the auxiliary cavity sheet, so that the airbag as a whole can be more easily realized in different shape requirements, and the structural flexibility of the airbag manufacturing is improved.

[0044] In a specific embodiment, Figure 2 , Figure 4 , Figure 8 As shown, the auxiliary cavity sheet may include a first auxiliary cavity sheet 741 and a second auxiliary cavity sheet 742 , and the first auxiliary cavity sheet 741 and the second auxiliary cavity sheet 742 are sewn and connected to the main cavity sheet 710 respectively to form a main air bag 730 .

[0045] The first auxiliary cavity sheet 741 and the second auxiliary cavity sheet 742 can be two cavity sheets with the same shape and size, or they can be cavity sheets with different shapes and sizes. The specific shape can be set according to the actual structure of the airbag, and this application does not specifically limit it.

[0046] When the second portion is a side portion of the main airbag 730, such as Figure 8 , Fig. 9 As shown, the first auxiliary cavity sheet 741 and the second auxiliary cavity sheet 742 are respectively used to form the left and right sides of the main airbag 730, so that the airbag can form a fuller structure. When the second part is the installation part or the extension part of the main airbag 730, as shown in FIG. Figure 4 , Figure 7 As shown, the first auxiliary cavity sheet 741 and the second auxiliary cavity sheet 742 are respectively used to form two air bag surfaces of the installation part and the extension part of the main air bag 730. The two air bag surfaces are overlapped and sewn to form a bag-like structure, so as to more conveniently form the air bag parts corresponding to the installation part and the extension part.

[0047] The convex hull 720 is a bag-like structure, so that it can expand when inflated. The convex hull 720 can be an integrally formed structure with the main cavity sheet 710, or can be sewn to the main cavity sheet 710 through a sewing structure. When the convex hull 720 is inflated, it can be a convex hull structure such as a columnar convex hull, a special-shaped convex hull, a long strip convex hull, etc., which is not specifically limited in this application. The convex hulls 720 on the left and right sides of the main cavity sheet 710 can have the same structure or different structures.

[0048] The convex portion 720 may be an integrally formed bag-like structure, or may be a bag-like structure formed by sewing one or more cavity sheets. Figure 4 As shown in (c), the left and right sides of the main cavity sheet 710 can be respectively extended outward to be connected with a special-shaped cavity sheet 721, and the special-shaped cavity sheets 721 are stacked and sewn along the edges through the special-shaped cavity sewing structure 722 to form the above-mentioned convex hull portion 720, that is, the convex hull portion 720 is sewn by the special-shaped cavity sheet 721. Specifically, the above-mentioned special-shaped cavity sheet 721 can be folded in half and then sewn along the edges to form a bag-shaped convex hull portion 720. The special-shaped cavity sheet 721 can be an integrally formed structure with the main cavity sheet 710, and the special-shaped cavity sheet 721 can also be sewn together with the main cavity sheet 710. When the convex portion 720 is an integrally formed bag-like structure, the sewing process can be reduced and the airbag manufacturing efficiency can be improved. When the convex portion 720 is a bag-like structure formed by sewing one or more cavity sheets, the airbag manufacturing process can be simpler. Technical personnel in this field can flexibly select the formation method of the convex portion 720 and the specific form of the special-shaped cavity sheet 721 according to actual needs, and this application does not specifically limit it.

[0049] The special-shaped cavity sheet 721 can be a one-piece molding structure, or can be formed by sewing multiple cavity sheets. When the special-shaped cavity sheet 721 is a one-piece molding structure, such as Figure 4 As shown, the special-shaped cavity sheet 721 can be formed by folding in half and sewing along the edge to form the above-mentioned convex portion 720. The special-shaped cavity sheet 721 can be an axisymmetric shape or an asymmetric shape. The present application does not limit the specific shape. The one-piece molding structure can reduce sewing, making the overall structure of the airbag flatter and improving production efficiency.

[0050] Optionally, when the special-shaped cavity sheet 721 is formed by sewing multiple cavity sheets, as Figure 5 , Figure 8 As shown, the special-shaped cavity piece 721 may include a first special-shaped cavity piece 721a and a second special-shaped cavity piece 721b, the first special-shaped cavity piece 721a is connected to the main cavity piece 710, the first special-shaped cavity piece 721a may be an integrally formed structure with the main cavity piece 710, the first special-shaped cavity piece 721a may also be sutured and connected to the main cavity piece 710, and the second special-shaped cavity piece 721b and the first special-shaped cavity piece 721a are stacked up and down and sutured together along the edge to form a convex hull portion 720. The convex hull portion 720 with various structures can be formed by stacking and sutured multiple cavity pieces.

[0051] Optionally, the main cavity sheet 710 can be a left-right symmetrical structure along the vertical direction, and the special-shaped cavity sheets 721 on the left and right sides of the main cavity sheet 710 can be symmetrically arranged along the vertical center line of the main cavity sheet 710 to form a structurally symmetrical airbag, so that the formed airbag structure is more regular and the sewing of the airbag is simpler and more convenient. Alternatively, the main cavity sheet 710 can also be a left-right asymmetrical structure along the vertical direction, and the special-shaped cavity sheets 721 on the left and right sides of the main cavity sheet 710 can also be asymmetrically arranged along the vertical center line of the main cavity sheet 710. Those skilled in the art can flexibly arrange it, and this application does not specifically limit it.

[0052] The convex bulge 720 is integrally connected to the main airbag 730 , and the convex bulge 720 and the main airbag 730 are communicated so that the convex bulge 720 and the main airbag 730 can be inflated simultaneously by a gas generator 750 .

[0053] When the airbag is inflated, the two convex hulls 720 can extend outwards toward the direction of the occupant 8 to be protected, and specifically can be facing the direction of the occupant 8 to be protected, so that the two convex hulls 720 and the main airbag 730 form a U-shaped structure when the airbag is inflated. The two convex hulls can also extend obliquely toward the direction of the occupant 8 to be protected, so that the two convex hulls 720 and the main airbag 730 form a V-shape or a bull horn shape when the airbag is inflated. Which structure is formed can be set according to actual conditions. When the convex hull 720 extends obliquely toward the direction of the occupant 8 to be protected, an inward oblique guiding force can be applied to the head of the occupant 8, so that the convex hull 720 can better limit the head of the occupant 8 between the two convex hulls.

[0054] In one embodiment, a first drawstring may be provided in the main airbag 730, one end of the first drawstring being connected to the root of the bulge 720, and the other end being connected to the main airbag 730. The first drawstring is used to pull the root of the bulge 720 inward when the airbag is inflated, so that the root of the bulge 720 contracts inward to maintain the shape of the bulge 720, and prevent the edges of the bulge 720 and the main airbag 730 from being too smooth and not protruding obviously relative to the main airbag 730, so that the two bulges are concave inward, thereby effectively blocking the user's head.

[0055] In another embodiment, if Figure 3 , Figure 6As shown, the convex hull 720 can be folded inward from the root of the convex hull 720 relative to the main cavity sheet 710 to overlap with the main cavity sheet 710, and the main cavity sheet 710 is overlapped to form a folded air bag 760, and the folded air bag 760 is sewed along the edge through the peripheral suture structure 732 to form the above-mentioned main air bag 730, and the convex hull 720 overlapped on the main cavity sheet 710 is sewed together with the main cavity sheet 710 through the peripheral suture structure 732, so that the peripheral suture The structure 732 forms an internal sewing thread for the convex part 720; the internal sewing thread is used to apply inward restraint to the convex part 720 when the airbag is inflated, so that the bottom of the convex part 720 has sufficient support to keep the convex part 720 in a convex shape, prevent the edges of the convex part 720 and the main airbag 730 from being too smooth and not protruding obviously relative to the main airbag 730, and ensure that the airbag is stably deployed in the required shape, so as to effectively block the user's head. This embodiment can also keep the convex shape stable and concave inward between the two convex humps without the control of the drawstring, so as to effectively block the user's head.

[0056] In the embodiment of the present application, the convex portion 720 can be folded on the inner side of the main airbag 730 , or can be folded on the outer side of the main airbag 730 to achieve overlapping with the folded airbag 760 .

[0057] The airbag provided in the present application includes a main cavity sheet 710, and the left and right sides of the main cavity sheet 710 are respectively extended outwardly and connected with a convex portion 720, and the convex portion 720 can expand when inflated. The main cavity sheet 710 can form a main air bag 730 by folding and sewing. Since the main air bag 730 is connected to the convex portion 720, when the airbag needs to be opened, the main air bag 730 can be inflated and the gas in the main air bag 730 flows to the convex portion 720, so that the main air bag 730 and the convex portion 720 can be inflated and expanded at the same time. The two convex portions 720 located on the left and right sides of the main cavity sheet 710 are used to protrude outward relative to the main airbag 730 and extend toward the occupant to be protected 8 when the airbag is inflated, so that the two convex portions 720 are respectively located on both sides of the head of the occupant to be protected 8, thereby limiting the left and right positions of the head of the occupant to be protected 8 and preventing the head from moving out of the airbag. The main airbag 730 is used to contact the head, neck and chest of the occupant to be protected 8 when inflated.

[0058] It can be seen that when the airbag provided in the present application is inflated, two convex portions 720 can be extended from the main airbag 730 toward the occupant 8. The two convex portions are located on both sides of the head of the occupant 8, thereby preventing the head of the occupant 8 from slipping out of the airbag, and better avoiding neck or head collision injuries caused by the occupant 8 head deviating from the airbag.

[0059] In addition, the present application connects the convex portion 720 to both sides of the main cavity sheet 710, so there is no need to make structural improvements to the auxiliary cavity sheets (such as the first auxiliary cavity sheet 741 and the second auxiliary cavity sheet 742 mentioned above), and it is more convenient to set two convex portions 720 on the main air bag 730. The structure is simple and easy to sew, which is more convenient for the sewing production of the airbag.

[0060] The airbag provided in the present application can be a roof-mounted airbag installed at the ceiling 4 panels, or a front airbag installed in front of the steering wheel, front panel or other seats, or a side airbag installed on the side of the seat, or an airbag installed at other locations, which is not specifically limited in the present application.

[0061] In one embodiment, a second drawstring 733 may be further provided in the main airbag 730, and both ends of the second drawstring 733 are connected in the main airbag 730, and both ends of the second drawstring 733 are respectively connected to two opposite surfaces of the main airbag 730, for example, one end of the second drawstring 733 is connected to the connection between the main cavity sheet 710 and the first auxiliary cavity sheet 741, and the other end is connected to the connection between the main cavity sheet 710 and the second auxiliary cavity sheet 742. When the airbag is inflated, the second drawstring 733 is deployed along with the expansion of the main airbag 730, and the second drawstring 733 is used to control the deployment form of the main airbag 730, ensuring that the main airbag 730 is at the head and chest position of the front-row occupant 8 after expansion, thereby protecting the head and chest position of the front-row occupant 8, and further improving the protection of the front-row occupant 8.

[0062] In a specific embodiment, when the airbag is an overhead airbag, the first auxiliary cavity sheet 741 and the second auxiliary cavity sheet 742 can be used to form a mounting portion and a protruding portion of the overhead airbag.

[0063] The following is an introduction to the method for manufacturing the airbag provided by the present application through a specific example. Figure 6 As shown, the present application also provides a method for manufacturing an airbag, which includes the following steps 1 to 6.

[0064] Step 1: The convex portions 720 on the left and right sides of the main cavity sheet 710 are folded inward.

[0065] The effect of the convex portion 720 being folded inward is shown in the figure Figure 6 As shown in (a) in .

[0066] Step 2: Overlap the first auxiliary cavity sheet 741 and the main cavity sheet 710 and sew them together through the first sewing structure 741a.

[0067] The effect of the first auxiliary cavity sheet 741 and the main cavity sheet 710 being overlapped and sewn together is shown in the figure below. Figure 6 As shown in (b) in .

[0068] Step 3: The first auxiliary cavity sheet 741 is folded outward along the first folding structure line 741b.

[0069] The first auxiliary cavity sheet 741 is provided with a first folding structure line 741b. The effect of the first auxiliary cavity sheet 741 being folded outward along the first folding structure line 741b is shown in FIG. Figure 6 As shown in (c) in .

[0070] Step 4: The second auxiliary cavity sheet 742 is overlapped with the combination of the first auxiliary cavity sheet 741 and the main cavity sheet 710 obtained in step 3 and sewn together through the second sewing structure 742a.

[0071] The effect diagram after the second auxiliary cavity sheet 742 and the combined body are sewn together by the second sewing structure 742a is as follows: Figure 6 As shown in (d) in .

[0072] Step 5: The second auxiliary cavity sheet 742 is folded outward along the second folding structure line 742 b , and the main cavity sheet 710 is folded along the third folding structure line 711 , to obtain the folded air bag 760 .

[0073] The second auxiliary cavity sheet 742 is provided with a second folding structure line 742b, the main cavity sheet 710 is provided with a third folding structure line 711, and the effect of the second auxiliary cavity sheet 742 being folded outward along the second folding structure line 742b is shown in FIG. Figure 6 As shown in (e) in FIG. 1 , the main cavity sheet 710 is folded along the third folding structure line 711. Figure 6 As shown in (f) in .

[0074] Step 6: The folded air bag 760 obtained in step 5 is closed and fixed together along the periphery of the main cavity sheet 710 through the peripheral sewing structure, wherein the convex portion 720 superimposed on the main cavity sheet 710 is sewn together with the main cavity sheet 710 through the peripheral sewing structure 732, so that the peripheral sewing structure 732 forms a built-in sewing line for the convex portion 720.

[0075] Step 6: The structure after suturing is as follows Figure 6 Step 6 After stitching, the folding property of the airbag is formed, and after inflation, the airbag is unfolded to form a Figure 7 The expanded structure shown.

[0076] The present application also provides a car, comprising any of the above-mentioned airbags. Figure 1The car includes a front windshield 1, an instrument panel 2, a roof, a canopy 4 and a sun visor 5. There is a certain angle between the front windshield 1 and the instrument panel. The roof is fixedly connected to the top of the front windshield 1. The sun visor 5 is rotatably connected to the bottom of the canopy 4. A gap is set between the canopy 4 and the car roof. A module housing 6 is installed in the gap. A safety airbag is installed in the module housing 6. When the car collides, the safety airbag expands and pops out from the module housing 6, and protects the head and chest of the front passenger 8, thereby reducing the damage to the front passenger 8.

[0077] Furthermore, in order to facilitate the ejection of the airbag, a weakened line is provided at one end of the roof 4 near the front windshield 1. When the airbag is inflated and ejected, the front end of the roof 4 is folded along the weakened line, thereby facilitating the ejection of the airbag and enabling the airbag to further wrap the front passenger 8. In this embodiment, the weakened line may be composed of a groove arranged along the width direction of the roof 4, and in other embodiments, it may be composed of a plurality of through holes evenly spaced along the width direction of the roof 4, as long as the roof 4 can be easily folded along the weakened line.

[0078] The airbag also includes a gas generator 750 disposed in the main airbag 730. One end of the gas generator 750 extends out of the main airbag 730 and is fixedly connected to the module housing 6 by bolts. When the car collides, the gas generator 750 operates to inflate the main cavity bag, causing the main cavity bag and the convex portion 720 to expand, thereby wrapping the front passenger 8 and reducing the possibility that the front passenger 8 will lean forward and hit the front windshield 1 or the dashboard due to the impact of the car.

[0079] It should be noted that, although several structures, components or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, according to the specific implementation of the present application, the features and functions of two or more structures, components or units described above can be concretized in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided into multiple components, structures or units to be concretized.

[0080] In addition, although the components and the installation methods of the components or devices in the present application are described in a specific order in the drawings, this does not require or imply that the components or devices must be designed according to the specific components or the installation methods of the components, or that all the components shown must be included to achieve the desired results. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve corresponding functions, and / or one component can be decomposed into multiple components to achieve corresponding functions, etc.

[0081] Although the present application is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present application. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A safety airbag, characterized in that: include: A main cavity sheet (710), wherein the left and right sides of the main cavity sheet (710) are respectively extended outwards and connected with convex hulls (720), wherein the convex hulls (720) are used to expand when inflated, and the main cavity sheet (710) is folded and sewn to form a main air bag (730), and the main air bag (730) is connected to the convex hulls (720); The two convex portions (720) are used to protrude outward relative to the main airbag (730) and extend toward the occupant to be protected when the airbag is inflated, so that the two convex portions (720) are respectively located on both sides of the head of the occupant to be protected, thereby limiting the head of the occupant to be protected to the left and right to prevent the head from moving out of the airbag, and the main airbag (730) is used to contact the head, neck and chest of the occupant to be protected when inflated.

2. The airbag according to claim 1, characterized in that: The left and right sides of the main cavity sheet (710) are respectively extended outwards to be connected with special-shaped cavity sheets (721), and the special-shaped cavity sheets (721) are stacked and sewn along the edges to form the convex bulge (720).

3. The airbag according to claim 2, characterized in that: The special-shaped cavity sheet (721) is a one-piece molding structure, the special-shaped cavity sheet (721) and the main cavity sheet (710) are an integrally molded structure, and the special-shaped cavity sheet (721) is formed by folding in half and sewing along the edge to form the convex bulge (720).

4. The airbag according to claim 2, characterized in that: The special-shaped cavity piece (721) comprises a first special-shaped cavity piece (721a) and a second special-shaped cavity piece (721b); The first special-shaped cavity sheet (721a) is connected to the main cavity sheet (710), the first special-shaped cavity sheet (721a) and the main cavity sheet (710) are an integrally formed structure, and the second special-shaped cavity sheet (721b) and the first special-shaped cavity sheet (721a) are stacked and sewn together along the edge to form the convex portion (720).

5. The airbag according to any one of claims 1 to 4, characterized in that: The convex hull portion (720) is folded inward from the root relative to the main cavity sheet (710) to overlap with the main cavity sheet (710), the main cavity sheet (710) forms a folded air bag (760) by overlapping, the folded air bag (760) is sewn along the edge by a sewing structure to form the main air bag (730), the convex hull portion (720) overlapped with the main cavity sheet (710) is sewn together with the main cavity sheet (710) by the peripheral sewing structure (732), so that the peripheral sewing structure (732) forms a built-in sewing line for the convex hull portion (720); The internal sewing thread is used to apply inward restraint to the root of the convex portion (720) when the safety airbag is inflated, so that the convex portion (720) maintains a convex shape.

6. The airbag according to any one of claims 1 to 4, characterized in that: The safety airbag further comprises an auxiliary cavity sheet, which is sewn together with the main cavity sheet (710) to form the main airbag (730), wherein the main cavity sheet (710) is used to form a first portion of the main airbag (730) in contact with the head, neck and chest of the occupant to be protected, and the auxiliary cavity sheet is used to form a second portion of the main airbag (730) other than the first portion and the convex portion (720).

7. The airbag according to claim 6, characterized in that: The second portion includes at least one of a side portion of the main air bag (730), a mounting portion of the main air bag (730), and a protruding portion of the main air bag (730).

8. The airbag according to claim 7, characterized in that: The auxiliary cavity sheet comprises a first auxiliary cavity sheet (741) and a second auxiliary cavity sheet (742), and the first auxiliary cavity sheet (741) and the second auxiliary cavity sheet (742) are respectively sewn and connected to the main cavity sheet (710) to form the main air bag (730); When the second portion is a side portion of the main air bag (730), the first auxiliary cavity sheet (741) and the second auxiliary cavity sheet (742) are respectively used to form the left and right sides of the main air bag (730).

9. The airbag according to claim 2, characterized in that: The main cavity sheet (710) is a left-right symmetrical structure or a left-right asymmetrical structure along the vertical direction, and the special-shaped cavity sheets (721) on the left and right sides of the main cavity sheet (710) are symmetrically arranged along the vertical midline of the main cavity sheet (710).

10. The airbag according to any one of claims 1 to 4, characterized in that: When the safety airbag is inflated, the two convex portions (720) and the main airbag (730) form a V-shaped or bull-horn-shaped structure.

Images