Side air curtain

Abstract

The utility model discloses a side air curtain which comprises an air curtain body, in the inflated state, the air curtain body comprises a first air cavity covering a rear car window area, the first air cavity comprises a main air channel and a plurality of rear window sub-air bags, the main air channel extends in the front-back direction and is communicated with one of the rear window sub-air bags, and the main air channel extends in the front-back direction and is communicated with the other of the rear window sub-air bags. The multiple rear window sub-airbags are all arranged at the lower end of the main air channel and are sequentially arranged in the front-back direction, every two adjacent rear window sub-airbags communicate with each other, each rear window sub-airbag extends in the up-down direction, and the lower end of each rear window sub-airbag covers a part of the rear vehicle door area on the lower side of the rear vehicle window. The multiple rear window air bags are arranged, so that the protection area of the air curtain can be effectively increased, and protection on passengers is enhanced; the two adjacent rear window sub-airbags are communicated with each other, and the main air passage is communicated with any rear window sub-airbag, so that the inflating efficiency of the first air cavity and the unfolding speed of the air curtain body can be improved, and passengers can be better protected by the air curtain body.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a side air curtain. Background Art

[0002] Side air curtains refer to curtain-type airbags installed on the sides of the vehicle. They can protect the occupants' heads and prevent direct collision between the occupants' heads and doors, windows, etc., thereby reducing injuries to the occupants.

[0003] In the prior art, the side air curtain has different protective effects on occupants of different heights. In particular, for shorter occupants, there is a problem that the occupant's head has already moved to the position between the side air curtain and the door or window before the side air curtain pops out to the position between the side air curtain and the door or window, resulting in the problem that the occupant cannot be effectively protected.

[0004] In addition, after the existing side air curtains are deployed, the coverage area of ​​the rear seats of the vehicle is small or the coverage time is long, resulting in a problem of poor protection effect for the rear seat occupants of the vehicle. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a side air curtain with better protection effect.

[0006] The side air curtain according to the embodiment of the utility model includes: an air curtain body. In the inflated state, the air curtain body includes a first air cavity covering the rear window area. The first air cavity includes a main air duct and multiple rear window sub-airbags. The main air duct extends in the front-to-back direction. The main air duct is connected to one of the multiple rear window sub-airbags. The multiple rear window sub-airbags are all arranged at the lower end of the main air duct and are arranged in sequence in the front-to-back direction. Two adjacent rear window sub-airbags are connected to each other. Each rear window sub-airbag extends in the up-down direction, and the lower end covers a part of the rear door area on the lower side of the rear window.

[0007] According to the side air curtain of the embodiment of the utility model, by providing multiple rear window sub-airbags, the protection area of ​​the air curtain can be effectively increased to enhance the protection of the occupants; by connecting two adjacent rear window sub-airbags to each other and connecting the main air duct to any one of the rear window sub-airbags, such a design can improve the inflation efficiency of the first air cavity and the deployment speed of the air curtain body, so that the air curtain body can better protect the occupants.

[0008] In addition, the side air curtain according to the utility model may also have the following additional technical features:

[0009] In some embodiments, in the direction from front to rear, the ventilation cross-section of the main air duct gradually increases, and the rear end of the main air duct extends to a portion of the vehicle body area behind the rear window.

[0010] In some embodiments, the rearmost rear window sub-airbag among the multiple rear window sub-airbags is a first rear window sub-airbag, the upper end of the first rear window sub-airbag is connected to the rear end of the main air duct, and the ventilation cross-section at the connection position is greater than or equal to the maximum ventilation cross-section of the main air duct.

[0011] In some embodiments, the first air cavity includes a rear window airbag, which is located at the lower end of the main air duct. The rear window airbag is provided with a plurality of first bonding ribs spaced apart along the front-to-back direction, and each of the first bonding ribs extends along the up-and-down direction so that the rear window airbag is constructed into a plurality of rear window sub-airbags.

[0012] In some embodiments, each of the first bonding ribs is formed by a downward extension of the lower edge of the main air duct, or, the first bonding rib at the rearmost position is formed by a downward extension of the lower edge of the main air duct, and the remaining first bonding ribs are formed by an upward extension of the lower edge of the air curtain body, or, the first bonding rib at the rearmost position is formed by an upward extension of the lower edge of the air curtain body, and the remaining first bonding ribs are formed by a downward extension of the lower edge of the main air duct.

[0013] In some embodiments, the free end of each of the first bonding ribs has a bonding area, and the bonding area extends toward the front or the rear.

[0014] In some embodiments, the rearmost rear window airbag among the multiple rear window airbags is the first rear window airbag, and in the up-down direction, a dimension L1 from point R of the rear seat to the center area of ​​the first rear window airbag satisfies: 558mm≤L1≤578mm; in the front-to-back direction, a dimension L2 from the headrest of the rear seat to the center area of ​​the first rear window airbag satisfies: 90mm≤L2≤110mm.

[0015] In some embodiments, one of the multiple rear window sub-airbags is a second rear window sub-airbag, and in the up and down direction, a dimension L3 from point R of the rear seat to the center area of ​​the second rear window sub-airbag satisfies: 565mm≤L1≤585mm; in the front and rear direction, a dimension L4 from the headrest of the rear seat to the center area of ​​the second rear window sub-airbag satisfies: 160mm≤L4≤180mm.

[0016] In some embodiments, one of the multiple rear window sub-airbags is a third rear window sub-airbag. In the up-down direction, a dimension L5 from point R of the rear seat to the center area of ​​the third rear window sub-airbag satisfies: 507mm≤L5≤527mm; in the front-to-back direction, a dimension L2 from the headrest of the rear seat to the center area of ​​the third rear window sub-airbag satisfies: 423mm≤L2≤443mm.

[0017] In some embodiments, the air curtain body also includes a second air cavity covering the front window area, the second air cavity includes a plurality of front window sub-airbags arranged in sequence along the front-to-back direction and interconnected, each of the front window sub-airbags extends in the up-down direction, and the lower end covers a portion of the front door area on the lower side of the front window, wherein one of the plurality of front window sub-airbags is a first front window sub-airbag, the front end of the main air duct is connected to the first front window sub-airbag, and the air inlet of the air curtain body is located at the connecting position between the main air duct and the first front window sub-airbag.

[0018] In some embodiments, the first air cavity and the second air cavity are spaced apart in a front-to-rear direction.

[0019] In some embodiments, a plurality of second bonding ribs spaced apart in the front-to-rear direction are disposed on the second air cavity, and each of the second bonding ribs extends in the up-down direction, so that the second air cavity constructs a plurality of the front window airbags.

[0020] In some embodiments, among the plurality of front window airbags, the volume of the front window airbags located on both sides is smaller than the volume of the front window airbag located in the middle.

[0021] In some embodiments, a second front window sub-airbag in communication with the first front window sub-airbag is disposed at a rear side of the first front window sub-airbag, and the second front window sub-airbag is located at a headrest of a front seat.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 1 is a schematic structural diagram of a side air curtain according to an embodiment of the utility model (first embodiment);

[0024] Figure 2 1 is a schematic structural diagram of a side air curtain according to an embodiment of the utility model (second embodiment);

[0025] Figure 3 It is a schematic structural diagram of a side air curtain (third embodiment) according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] 100. Side air curtain;

[0028] 1. air curtain body; 11. first air cavity; 111. main air channel; 112. rear window airbag; 1121. first rear window airbag; 1122. second rear window airbag; 1123. third rear window airbag; 1124. first bonding rib position; 11241. bonding area;

[0029] 2. Second air cavity; 21. Front window airbag; 22. Second bonding rib position; 211. First front window airbag; 212. Second front window airbag. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Reference below Figure 1-Figure 3 A side curtain airbag 100 according to an embodiment of the present invention is described.

[0035] like Figures 1 to 3 As shown, according to the embodiment of the utility model, the side air curtain 100 includes an air curtain body 1. In the inflated state, the air curtain body 1 includes a first air cavity 11 covering the rear window area. The first air cavity 11 includes a main air duct 111 and multiple rear window sub-airbags. The main air duct 111 extends in the front-to-back direction. The main air duct 111 is connected to one of the multiple rear window sub-airbags. The multiple rear window sub-airbags are all arranged at the lower end of the main air duct 111 and are arranged in sequence in the front-to-back direction. Two adjacent rear window sub-airbags are connected to each other. Each rear window sub-airbag extends in the up-down direction, and the lower end covers a part of the rear door area on the lower side of the rear window.

[0036] In this embodiment, the provision of multiple rear window sub-airbags can increase the coverage area of ​​the first air cavity 11, thereby increasing the protection range for the occupants and effectively improving the protection effect of the air curtain; two adjacent rear window sub-airbags are interconnected, and the main air duct 111 is connected to any one of the multiple rear window sub-airbags, which can ensure that the high-pressure gas flowing out of the main air duct 111 fills all the rear window sub-airbags. Such a design can speed up the filling speed of the high-pressure gas and improve the inflation efficiency, so that the deployment speed of the air curtain body 1 is effectively increased, thereby speeding up the protection of the occupants and preventing the occupants from directly colliding with the rear window without contacting the air curtain.

[0037] For example Figure 1 and Figure 2As shown, the three rear window sub-airbags are all located below the main air duct 111, wherein the rear window sub-airbag close to the main air duct 111 is connected to the main air duct 111, and the remaining two rear window sub-airbags are sequentially arranged on the front side of the rear window sub-airbag close to the main air duct 111, and the three rear window airbags are sequentially connected from back to front, and the main air duct 111 and the three rear window sub-airbags constitute an integrated gas flow passage. When the high-pressure gas enters the main air duct 111, the high-pressure gas can flow rapidly along the integrated gas flow passage constituted by the main air duct 111 and the three rear window sub-airbags, and fill the main air duct 111 and the three rear window sub-airbags in sequence, so that the air curtain body 1 covering the rear window area can be quickly deployed to protect the occupants in the rear row, thereby effectively preventing the air curtain body 1 from opening in time, causing the occupants to collide with the rear window first.

[0038] According to the side air curtain 100 of the embodiment of the utility model, by providing a plurality of rear window sub-airbags, the protection area of ​​the air curtain can be effectively increased to enhance the protection of the occupants; by interconnecting two adjacent rear window sub-airbags and connecting the main air duct 111 with any one of the rear window sub-airbags, such a design can improve the inflation efficiency of the first air cavity 11 and the deployment speed of the air curtain body 1, so that the air curtain body 1 can better protect the occupants.

[0039] In one embodiment of the present invention, Figures 1 to 3 As shown, in the direction from front to back, the ventilation cross section of the main air duct 111 gradually increases, and the rear end of the main air duct 111 extends to a part of the vehicle body area behind the rear window. Figure 1 and Figure 2 As shown, the main air duct 111 extends from front to rear, and in the direction of extension, the ventilation cross-section of the main air duct 111 gradually increases; when the high-pressure gas just enters the main air duct 111, the ventilation cross-section of the main air duct 111 is small. At this time, the flow rate of the high-pressure gas is fast and the air pressure is high. As the high-pressure gas continues to flow, the ventilation cross-section of the main air duct 111 gradually increases. At this time, the internal high-pressure energy of the high-pressure gas is gradually released, and the volume of the high-pressure gas gradually expands. The kinetic energy carried by the faster flow rate of the high-pressure gas itself will be superimposed on the high-pressure energy to further accelerate the volume expansion speed of the high-pressure gas, so that the high-pressure gas can quickly fill the first air cavity 11. In this way, the deployment speed of the air curtain body 1 can be significantly improved, and the rear window area can be covered more quickly to protect the occupants.

[0040] Furthermore, the main air duct 111 extends to a portion of the vehicle body area behind the rear window, so that the protection area of ​​the air curtain body 1 can be increased to prevent rear passengers from hitting the vehicle body behind the rear window.

[0041] In a specific embodiment of the present invention, Figures 1 to 3As shown, the rearmost one of the plurality of rear window airbags is the first rear window airbag 1121, the upper end of the first rear window airbag 1121 is connected to the rear end of the main air duct 111, and the ventilation cross section at the connection position is greater than or equal to the maximum ventilation cross section of the main air duct 111. Figure 1 and Figure 2 As shown, since the ventilation cross-section at the rear end of the main air duct 111 is larger, the flow rate of the high-pressure gas at the rear end of the main air duct 111 is larger, so that the first rear window airbag 1121 connected to the rear end of the main air duct 111 can be quickly filled with a large amount of high-pressure gas to protect the occupants; the ventilation cross-section at the connecting position can be larger than the maximum ventilation cross-section of the main air duct 111, and can also be equal to the maximum ventilation cross-section of the main air duct 111. Such a design is conducive to the rapid filling of high-pressure gas and can effectively increase the deployment speed of the air curtain body 1.

[0042] In one embodiment of the present invention, Figures 1 to 3 As shown, the first air chamber 11 includes a rear window airbag 112, which is located at the lower end of the main air passage 111. The rear window airbag 112 is provided with a plurality of first bonding ribs 1124 spaced apart in the front-to-back direction, and each first bonding rib 1124 extends in the up-down direction, so that the rear window airbag 112 is configured into a plurality of rear window sub-airbags. Figure 1 and Figure 2 As shown, the rear window airbag 112 is composed of a plurality of rear window sub-airbags, and two adjacent rear window sub-airbags are separated by a first bonding rib 1124. The plurality of first bonding ribs 1124 are arranged at intervals along the front-to-rear direction and extend along the up-and-down direction. In this way, the rear window airbag 112 can be divided into a plurality of rear window sub-airbags by setting a plurality of first bonding ribs 1124. The volume of the rear window sub-airbags is smaller. The smaller rear window airbags not only have high inflation efficiency, but also have higher gas pressure in the airbags, which can provide better support for the occupants. At the same time, the first bonding ribs 1124 can also limit the shape and position of the rear window airbag according to the protection design standards of the vehicle to meet the protection needs of different vehicles.

[0043] In a specific embodiment of the present invention, Figures 1 to 3 As shown, each first bonding rib position 1124 is formed by a downward extension of the lower edge of the main air duct 111, or, the first bonding rib position 1124 at the rearmost position is formed by a downward extension of the lower edge of the main air duct 111, and the remaining first bonding rib positions 1124 are formed by an upward extension of the lower edge of the air curtain body 1, or, the first bonding rib position at the rearmost position is formed by an upward extension of the lower edge of the air curtain body, and the remaining first bonding rib positions are formed by a downward extension of the lower edge of the main air duct.

[0044] In a specific embodiment, for example Figure 1As shown, a plurality of first bonding ribs 1124 are provided in the rear window airbag 112, and the plurality of first bonding ribs 1124 are all formed by extending downward from the lower edge of the main air duct 111, so that the air inlets of the plurality of rear window airbags separated by the plurality of first bonding ribs 1124 are all facing downward; when the high-pressure gas enters the first air cavity 11, the high-pressure gas first flows from front to back along the extension direction of the main air duct 111, and then the high-pressure gas passes through the connecting area between the main air duct 111 and the rear window airbag, and then flows into the first air cavity 11. Under the guidance of the rear edge of the air curtain body 1, the flow direction turns to downward flow. When the high-pressure gas flows to the lower edge of the air curtain body 1, under the guidance of the lower edge, the flow direction turns to flow from back to front. At this time, the air inlets of the rear window airbags are all facing the lower edge of the air curtain body 1. In this way, the high-pressure gas flowing from front to back can flow smoothly into multiple rear window airbags, thereby quickly filling multiple rear window airbags, thereby significantly improving the inflation speed of the rear window airbag 112.

[0045] The design of the multiple first bonding ribs 1124 of the rear window airbag 112 in the above embodiment does not hinder the flow of high-pressure gas, so that the flow of high-pressure gas is continuous and smooth with less energy loss, so that the rear window airbag 112 can be filled more quickly.

[0046] In a specific embodiment, for example Figure 2 As shown, a plurality of first bonding ribs 1124 are provided in the rear window airbag 112, wherein the first bonding rib 1124 at the rearmost position is formed by extending downward from the lower edge of the main air duct 111, and the remaining first bonding ribs 1124 are formed by extending upward from the lower edge of the air curtain body 1, so that the air inlets of all the rear window airbags are facing upward; when the high-pressure gas enters the first air cavity 11, the high-pressure gas first flows from front to rear along the extension direction of the main air duct 111, and then the high-pressure gas passes through the connecting area between the main air duct 111 and the rear window airbag, and flows into the air curtain body 1. Under the guidance of the rear edge, the flow direction turns to downward flow. When the high-pressure gas flows to the lower edge of the air curtain body 1, under the dual guidance of the lower edge of the air curtain body 1 and the first bonding rib 1124 extending upward, the flow direction turns to flow from bottom to top. Subsequently, under the dual guidance of the first bonding rib 1124 and the lower edge of the main air duct 111, the flow direction of the high-pressure gas turns to flow from back to front. At this time, the high-pressure gas can fill the rear window airbag when flowing through the air inlet toward the upper side, so that the air curtain body 1 gradually unfolds to achieve protection for the occupants.

[0047] The design of the multiple first bonding ribs 1124 of the rear window airbag 112 in the above embodiment will hinder the backflow of high-pressure gas. In this way, when the high-pressure gas fills the rear window airbag and the occupant hits the coverage area of ​​the rear window airbag, the outflow speed of the high-pressure gas in the rear window airbag is slower, thereby making the gas pressure in the rear window airbag decay more slowly, thereby significantly improving the support of the rear window airbag.

[0048] In a specific embodiment, for example Figure 3 As shown, a plurality of first bonding ribs 1124 are provided in the rear window airbag 112, wherein the first bonding rib 1124 at the rearmost position is formed by the lower edge of the air curtain body 1 extending upward, and the remaining first bonding ribs 1124 are all formed by the lower edge of the main air duct 111 extending downward, so that the air inlet of the first rear window airbag 1121 faces upward, and the air inlets of the remaining rear window airbags all face downward; when the high-pressure gas enters the first air cavity 11, the high-pressure gas first flows from front to rear along the extension direction of the main air duct 111, and then the high-pressure gas passes through the connecting area between the main air duct 111 and the rear window airbag, and under the guidance of the rear side edge of the air curtain body 1, the flow direction is turned to flow downward, and at the rearmost first bonding rib 1124, the air inlet of the first rear window airbag 1121 faces upward, and the air inlet of the remaining rear window airbags faces downward. Under the separation of the bonding rib 1124, a part of the high-pressure gas can flow into the first rear window sub-airbag 1121 with the air inlet facing upward to quickly fill the first rear window sub-airbag 1121. At the same time, when another part of the high-pressure gas flows to the lower edge of the air curtain body 1, the flow direction is changed to flow from back to front under the guidance of the rearmost first bonding rib 1124 and the lower edge of the air curtain body 1. At this time, the air inlets of the remaining rear window sub-airbags are all facing the lower edge of the air curtain body 1. In this way, the high-pressure gas flowing from front to back can smoothly flow into the remaining multiple rear window sub-airbags, thereby quickly filling the remaining multiple rear window sub-airbags, thereby significantly improving the inflation speed of the rear window airbag 112.

[0049] The design of the rearmost first bonding rib 1124 in the above embodiment will hinder the backflow of high-pressure gas. In this way, after the high-pressure gas fills the first rear window airbag 1121, when the occupant hits the coverage area of ​​the first rear window airbag 1121, the outflow speed of the high-pressure gas in the first rear window airbag 1121 is slower, thereby making the decay rate of the gas pressure in the first rear window airbag 1121 slower, thereby significantly improving the support of the first rear window airbag 1121. At the same time, the design of the remaining multiple first bonding ribs 1124 of the rear window airbag 112 in the above embodiment does not hinder the flow of high-pressure gas, so that the flow of high-pressure gas is continuous and smooth, with less energy loss, and the remaining rear window airbags can be filled more quickly.

[0050] In a specific embodiment, for example Figure 1 and Figure 2As shown, in the direction from back to front, the length of the first bonding rib 1124 at the rear position is smaller than the length of the first bonding rib 1124 at the front position. Such a design can gradually narrow the gas flow channel of the high-pressure gas when it flows from back to front, thereby gradually increasing the gas pressure and flow rate of the high-pressure gas, thereby filling the rear window airbag 112 faster; at the same time, after the high-pressure gas fills the rear window airbag 112, the first bonding rib 1124 at the front position and with a longer length can hinder the backflow of the high-pressure gas, thereby making the gas pressure in the rear window airbag 112 decay more slowly, thereby improving the support of the rear window airbag 112.

[0051] In a specific embodiment of the present invention, Figures 1 to 3 As shown, the free end of each first bonding rib 1124 has a bonding area 11241, and the bonding area 11241 extends toward the front or the rear, that is, the bonding area 11241 can extend toward the front or toward the rear; the bonding area 11241 makes the air inlet of each rear window airbag have an arc transition, so that the bonding area 11241 extending toward the front can guide the flow direction of the high-pressure gas to increase the deployment speed of the air curtain body 1; the air inlet of the rear window airbag with an arc transition can reduce the flow resistance of the high-pressure gas during the flow, thereby making the flow of the high-pressure gas smoother and filling the rear window airbag 112 faster.

[0052] In one embodiment of the present invention, Figures 1 to 3 As shown, the rearmost rear window airbag among the multiple rear window airbags is the first rear window airbag 1121. In the vertical direction, the dimension L1 from the point R of the rear seat to the center area of ​​the first rear window airbag 1121 satisfies: 558mm≤L1≤578mm; in the front-to-back direction, the dimension L2 from the headrest of the rear seat to the center area of ​​the first rear window airbag 1121 satisfies: 90mm≤L2≤110mm. When the first rear window airbag 1121 covers the area defined by the above dimensions, the first rear window airbag 1121 can effectively protect the occupants, especially the occupants with shorter heights.

[0053] The side air curtain in the prior art cannot effectively protect the Q10 (ten-year-old child) dummy in the collision test of the Q10 dummy. The side air curtain 100 in the present application can effectively protect the Q10 dummy in the Q10 dummy collision test by setting the first rear window airbag 1121 of the size of the above embodiment.

[0054] In one embodiment of the present invention, Figures 1 to 3As shown, one of the multiple rear window sub-airbags is the second rear window sub-airbag 1122. In the vertical direction, the dimension L3 from the point R of the rear seat to the center area of ​​the second rear window sub-airbag 1122 satisfies: 565mm≤L1≤585mm; in the front-to-back direction, the dimension L4 from the headrest of the rear seat to the center area of ​​the second rear window sub-airbag 1122 satisfies: 160mm≤L4≤180mm. When the second rear window sub-airbag 1122 covers the area defined by the above dimensions, the second rear window sub-airbag 1122 can effectively protect the occupants, especially the occupants with shorter heights.

[0055] The side curtain airbags in the prior art cannot effectively protect the H-III-5% (a female whose body can cover 5%) dummy in a collision test on the H-III-5% dummy. The side curtain airbag 100 in the present application can effectively protect the H-III-5% dummy in a collision test on the H-III-5% dummy by setting the second rear window airbag 1122 of the size of the above-mentioned embodiment.

[0056] In one embodiment of the present invention, Figures 1 to 3 As shown, one of the multiple rear window sub-airbags is the third rear window sub-airbag 1123. In the vertical direction, the dimension L5 from the point R of the rear seat to the center area of ​​the third rear window sub-airbag 1123 satisfies: 507mm≤L5≤527mm; in the front-to-back direction, the dimension L2 from the headrest of the rear seat to the center area of ​​the third rear window sub-airbag 1123 satisfies: 423mm≤L2≤443mm. When the third rear window sub-airbag 1123 covers the area defined by the above dimensions, the third rear window sub-airbag 1123 can effectively protect the occupants, especially the occupants whose bodies lean forward and move toward the side air curtain 100 during the collision.

[0057] In one embodiment of the present invention, Figures 1 to 3 As shown, the air curtain body 1 also includes a second air cavity 2 covering the front window area, and the second air cavity 2 includes a plurality of front window airbags 21 arranged in sequence along the front-to-back direction and interconnected, each front window airbag 21 extends along the up-down direction, and the lower end covers a portion of the front door area on the lower side of the front window, wherein one of the plurality of front window airbags 21 is a first front window airbag 211, a front end of the main air duct 111 is connected to the first front window airbag 211, and an air inlet of the air curtain body 1 is located at the connecting position between the main air duct 111 and the first front window airbag 211.

[0058] In this embodiment, the provision of multiple front window airbags 21 can increase the coverage area of ​​the second air cavity 2, thereby increasing the protection range for the front occupants, so that the protection effect of the air curtain is effectively improved; multiple front window airbags 21 are arranged in sequence along the front and rear directions and are interconnected, and one of the front window airbags 21 is connected to the front end of the main air duct 111. Such a design can speed up the filling speed of high-pressure gas and improve the inflation efficiency, so that the deployment speed of the air curtain body 1 is effectively increased, thereby speeding up the protection of the occupants and preventing the occupants from directly colliding with the front window without contacting the air curtain.

[0059] In a specific embodiment of the present invention, Figures 1 to 3 As shown, the first air cavity 11 and the second air cavity 2 are spaced apart in the front-to-back direction. Figure 1 and Figure 2 As shown, the first air cavity 11 is located at the rear window to protect the rear passengers, and the second air cavity 2 is located at the front window to protect the front passengers.

[0060] In a specific embodiment of the present invention, Figures 1 to 3 As shown, a plurality of second bonding ribs 22 spaced apart in the front-to-rear direction are provided on the second air cavity 2 , and each second bonding rib 22 extends in the up-down direction, so that the second air cavity 2 constructs a plurality of front window airbags 21 .

[0061] In some embodiments, the free end of the second bonding rib 22 has a bonding area 11241 .

[0062] For example Figures 1 to 3 As shown, the front window airbag is composed of a plurality of front window sub-airbags, and two adjacent front window airbags are separated by a second bonding rib 22. The plurality of second bonding ribs 22 are spaced apart in the front-to-back direction and extend in the up-down direction. In this way, the front window airbag can be separated into a plurality of front window sub-airbags 21 by setting a plurality of second bonding ribs 22. The volume of the front window airbag 21 is relatively small. The front window airbag 21 with a smaller volume not only has a high inflation efficiency, but also has a higher gas pressure in the airbag, which can provide better support for the occupant. At the same time, the second bonding rib 22 can also limit the shape and position of the front window airbag according to the protection design standard of the vehicle to meet the protection needs of different vehicles.

[0063] In a specific embodiment of the present invention, Figures 1 to 3As shown, among the multiple front window airbags 21, the volumes of the front window airbags 21 on both sides are smaller than the volume of the front window airbag 21 in the middle. In this way, the front window airbags 21 on both sides are easily filled with high-pressure gas. When the high-pressure gas fills the front window airbags 21 on both sides, the high-pressure gas in the front window airbags 21 on both sides will flow back to the front window airbag 21 in the middle. At the same time, under the combined effect of the reflux gas in the front window airbags 21 on both sides and the high-pressure gas that continues to flow to the front window airbag 21 in the middle, the front window airbag 21 in the middle can be quickly filled with gas, thereby maintaining the stability of the side air curtain 100 when it is deployed.

[0064] In a specific embodiment of the present invention, Figures 1 to 3 As shown, the rear side of the first front window airbag 211 has a second front window airbag 212 connected to the first front window airbag 211, and the second front window airbag 212 is located at the headrest of the front seat; in this specific embodiment, the second front window airbag 212 can effectively protect the head of the front passenger.

[0065] Other structures and operations of the side air curtain 100 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A side air curtain, characterized in that: include: The air curtain body comprises a first air cavity covering the rear window area in an inflated state, the first air cavity comprising a main air duct and a plurality of rear window sub-airbags, the main air duct extending in the front-to-rear direction, the main air duct being connected to one of the plurality of rear window sub-airbags, the plurality of rear window sub-airbags being arranged at the lower end of the main air duct and arranged in sequence in the front-to-rear direction, two adjacent rear window sub-airbags being connected to each other, each of the rear window sub-airbags extending in the up-down direction, and the lower end covering a portion of the rear door area on the lower side of the rear window.

2. The side curtain airbag according to claim 1, characterized in that: In the direction from front to rear, the ventilation cross section of the main air duct gradually increases, and the rear end of the main air duct extends to a part of the vehicle body area behind the rear window.

3. The side curtain airbag according to claim 2, characterized in that: The rearmost rear window airbag among the multiple rear window airbags is the first rear window airbag, the upper end of the first rear window airbag is connected to the rear end of the main air duct, and the ventilation cross-section at the connection position is greater than or equal to the maximum ventilation cross-section of the main air duct.

4. The side curtain airbag according to claim 1, characterized in that: The first air cavity includes a rear window airbag, which is located at the lower end of the main air duct. The rear window airbag is provided with a plurality of first bonding ribs spaced apart along the front-to-back direction, and each of the first bonding ribs extends along the up-and-down direction so that the rear window airbag is constructed into a plurality of rear window sub-airbags.

5. The side curtain airbag according to claim 4, characterized in that: Each of the first bonding ribs is formed by extending downward from the lower edge of the main air channel, or, The first bonding rib at the rearmost position is formed by extending downward from the lower edge of the main air duct, and the remaining first bonding ribs are formed by extending upward from the lower edge of the air curtain body, or, The first bonding rib position at the rearmost position is formed by the lower edge of the air curtain body extending upward, and the remaining first bonding rib positions are formed by the lower edge of the main air duct extending downward.

6. The side curtain airbag according to claim 4, characterized in that: The free end of each of the first bonding ribs has a bonding area, and the bonding area extends toward the front or the rear.

7. The side curtain airbag according to claim 1, characterized in that: The rearmost rear window airbag among the plurality of rear window airbags is a first rear window airbag, In the up-down direction, the dimension L1 from the point R of the rear seat to the center area of ​​the first rear window airbag satisfies: 558 mm ≤ L1 ≤ 578 mm; In the front-to-rear direction, a dimension L2 from the headrest of the rear seat to the center area of ​​the first rear window airbag satisfies: 90 mm ≤ L2 ≤ 110 mm.

8. The side curtain airbag according to claim 1, characterized in that: One of the plurality of rear window airbags is a second rear window airbag, In the vertical direction, the dimension L3 from the point R of the rear seat to the center area of ​​the second rear window airbag satisfies: 565mm≤L1≤585mm; In the front-to-rear direction, a dimension L4 from the headrest of the rear seat to the center area of ​​the second rear window airbag satisfies: 160mm≤L4≤180mm.

9. The side curtain airbag according to claim 1, characterized in that: One of the plurality of rear window airbags is a third rear window airbag, In the up-down direction, the dimension L5 from the point R of the rear seat to the center area of ​​the third rear window airbag satisfies: 507 mm ≤ L5 ≤ 527 mm; In the front-to-rear direction, a dimension L2 from the headrest of the rear seat to the center area of ​​the third rear window airbag satisfies: 423 mm ≤ L2 ≤ 443 mm.

10. The side curtain airbag according to claim 1, characterized in that: The air curtain body also includes a second air cavity covering the front window area, the second air cavity includes a plurality of front window sub-airbags arranged in sequence along the front-to-back direction and interconnected, each of the front window sub-airbags extends in the up-down direction, and the lower end covers a portion of the front door area on the lower side of the front window, wherein one of the plurality of front window sub-airbags is a first front window sub-airbag, the front end of the main air duct is connected to the first front window sub-airbag, and the air inlet of the air curtain body is located at the connecting position between the main air duct and the first front window sub-airbag.

11. The side curtain airbag according to claim 10, characterized in that: The first air cavity and the second air cavity are spaced apart in a front-to-rear direction.

12. The side curtain airbag according to claim 10, characterized in that: The second air cavity is provided with a plurality of second bonding ribs spaced apart in the front-to-back direction, and each of the second bonding ribs extends in the up-down direction, so that the second air cavity constructs a plurality of the front window airbags.

13. The side curtain airbag according to claim 10, characterized in that: Among the plurality of front window airbags, the volume of the front window airbags located at both sides is smaller than the volume of the front window airbag located in the middle.

14. The side curtain airbag according to claim 10, characterized in that: A second front window sub-airbag is provided at the rear side of the first front window sub-airbag and is in communication with the first front window sub-airbag. The second front window sub-airbag is located at the headrest of the front seat.

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