Automobile side curtain type air bag

Abstract

The utility model discloses an automobile side curtain type air bag which comprises an air bag, an inclined air inlet is formed in the upper end of the middle of the air bag, and a heat insulation air guide assembly is arranged at the position, corresponding to the air inlet, in the air bag. A plurality of air bag lugs are arranged on two sides of the air inlet at the upper end of the air bag; a plurality of sewing patterns are arranged on the air bag in the longitudinal direction of the air bag and used for controlling the unfolding thickness and the airflow trend of the air bag. The air bag is characterized in that a small rectangular air cavity is formed in the upper end of the rear portion of the air bag, the side, facing the air bag, of the small air cavity is turned over and communicated with a main air cavity in the air bag in a reducing mode, and after the air bag is completely unfolded, double protection barriers of a large bag cavity and a small bag cavity are formed between rear row passengers and a car body side wall metal plate. The air bag can provide more comprehensive head and neck protection for passengers in the back row during side collision, and therefore the risk that the passengers are injured is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to an airbag, and more particularly to a side curtain airbag for automobiles. Background Technology

[0002] With the introduction of injury assessments for rear-seat occupants and children in the Euro NCAP (European New Car Assessment Program) standards, rear-seat occupant protection has received increasing attention, becoming a crucial focus in the development of passive safety systems. In addition to Euro NCAP, other regulatory requirements have also brought rear-seat restraint systems into sharper focus.

[0003] Existing curtain airbags typically consist of a rectangular inflatable bag with an air inlet at the upper middle or front end, into which a gas generator is inserted. A guide vane is located inside the inflatable bag corresponding to the air inlet to guide gas into the bag and prevent the airbag from burning through due to high temperatures during deployment. When deployed, this type of curtain airbag forms an air cushion between the occupant and the side panel of the vehicle. However, for some models with low C-pillars, it cannot provide effective head and neck protection for rear passengers in side collisions. To effectively reduce the risk of neck and head injuries to rear passengers in collisions in some models, there is an urgent need to design a new type of airbag. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a side curtain airbag for automobiles that can provide more comprehensive head and neck protection for rear passengers in the event of a side collision, thereby significantly reducing the risk of injury to passengers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A side curtain airbag for automobiles includes an airbag, an inclined air inlet at the upper middle part of the airbag, and a heat-insulating air-guiding assembly inside the airbag corresponding to the air inlet; multiple airbag lugs are provided on both sides of the air inlet at the upper part of the airbag; and multiple sewing patterns are provided on the airbag along its longitudinal direction to control the deployment thickness and airflow direction of the airbag.

[0007] Its special feature is that a small rectangular air chamber is provided at the upper rear end of the airbag. After the small air chamber is folded towards the airbag, it is connected to the main air chamber inside the airbag with a narrowed diameter. This allows the airbag to fully unfold and form a double protective barrier of two cavities of different sizes between the rear passengers and the side panel of the vehicle body.

[0008] As a further preferred embodiment, the edge of the small air cavity is folded over and sewn to the rear edge of the air bag with a fine thread to facilitate the folding of the air bag.

[0009] As a further preferred embodiment, the air bag is formed by sewing two bag pieces together with adhesive and sewing thread. An approximately triangular sealing area is formed at the lower center of the air bag by sewing thread to control the unfolding thickness of the air bag and improve the unfolding speed.

[0010] As a further preferred embodiment, there are three sewing patterns, of which the sewing patterns at both ends are microphone-shaped; the sewing pattern in the middle is a trapezoid with the bottom edge removed and forms a bent air guide channel connecting the front and rear of the main air chamber with the sealing area, which is used to control the overall unfolding thickness of the air bag and the direction of airflow.

[0011] As a further preferred embodiment, the heat insulation and gas guiding assembly includes a gas bag liner and two gas bag heat insulation sheets. The gas bag liner is folded in half, with the bottom edge folded inward and sewn together to form a three-way structure with one air inlet and two air outlets to restrict the flow of gas into the gas bag. The two gas bag heat insulation sheets are overlapped and fixed to the air inlet at the upper part of the gas bag liner by sewing thread to prevent the gas bag from being burned through by high temperature when it explodes.

[0012] The beneficial effects of this utility model are:

[0013] 1. By using a small rectangular air chamber located at the upper rear of the airbag, which is folded over and connected to the main air chamber inside the airbag with a narrowed diameter, the airbag, when fully deployed, forms a double protective barrier of two cavities of different sizes between the rear passengers and the side panels of the vehicle body. This effectively improves the protection of the head and neck of the rear passengers and reduces the risk of injury caused by side collisions. It is especially suitable for some sedan models with low C-pillars.

[0014] 2. By installing a heat-insulating gas-guiding assembly at the corresponding air inlet inside the air bag, the gas can be guided to fill the air bag in a predetermined flow direction; this can enhance the overall structural strength of the air bag, effectively protect the air inlet of the air bag, and reduce the risk of air bag damage caused by the large impact strength and high temperature at the air outlet of the gas generator. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the flat unfolding of this utility model.

[0016] Figure 2 yes Figure 1 A schematic diagram of the folded small and medium-sized air cavities.

[0017] Figure 3 This is a schematic diagram of the structure of this utility model after folding.

[0018] Figure 4 This is an installation diagram of this utility model.

[0019] Figure 5 This is a schematic diagram of the heat insulation and air conduction assembly.

[0020] Figure 6 yes Figure 5 AA sectional view.

[0021] Figure 7 This is a schematic diagram of the installed version of this utility model.

[0022] Figure 8 yes Figure 7 A top-down view of the unfolded diagram.

[0023] In the diagram: 1. Air bag, 101. Air inlet, 102. Sewing pattern, 2. Heat insulation and air guiding assembly, 3. Air bag liner, 301. Air bag heat insulation sheet, 302. Sewing thread, 303. Air bag ear, 4. Bending air guiding channel, 5. Sealing area, 6. Thread, 7. Air bag fixing piece, 8. Gas generator, 9. Generator bracket, 10. Protective cover, 11. Detailed Implementation

[0024] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0025] like Figures 1-6 As shown, this utility model relates to a side curtain airbag for automobiles, including an airbag 1. The airbag 1 is formed by overlapping two bag pieces and sewing them together with adhesive and sewing thread. An approximately triangular sealing area 6 is formed in the lower middle part of the airbag 1 by adhesive and sewing thread to control the deployment thickness of the airbag 1 and improve the deployment speed.

[0026] An inclined air inlet 101 is provided at the upper middle part of the airbag 1, and a heat-insulating air-guiding assembly 3 is provided inside the airbag 1 corresponding to the air inlet 101 for inserting and fixing the gas generator. Multiple airbag lugs 4 are sewn and fixed to both sides of the air inlet at the upper part of the airbag 1 by sewing thread to facilitate the connection of the airbag fixing plate to be installed on the side panel sheet metal of the vehicle body. Multiple sewing patterns 2 are provided on the airbag 1 along its longitudinal direction to control the unfolding thickness and airflow direction of the airbag 1.

[0027] The heat insulation and gas guiding assembly 3 includes a gas bag liner 301 and two gas bag heat insulation sheets 302. The gas bag liner 301 is folded in half and the bottom edge is folded inward and sewn together with sewing thread 303 to form a three-way structure with one air inlet and two air outlets, so as to facilitate the installation of the gas generator and restrict the flow of gas into the gas bag 1. The two gas bag heat insulation sheets 302 are overlapped and sewn and fixed to the air inlet at the upper part of the gas bag liner 301 to prevent the gas bag 1 from being burned through by high temperature when it explodes.

[0028] A rectangular small air chamber 102 is provided at the upper rear end of the airbag 1. The length and width of the small air chamber 102 are preferably 340mm*160mm. After the small air chamber 102 is folded towards the airbag 1, it is connected to the main air chamber inside the airbag 1 with a narrowed diameter and a connection length preferably 160mm. When the airbag 1 is fully deployed, it forms a double protective barrier of two cavities of different sizes between the rear passengers and the side panel of the vehicle body, providing an additional protective barrier for the occupants' heads and effectively reducing collision injuries. The outer edge of the small air chamber 102 is folded and sewn to the rear edge of the airbag 1 with a thin thread 7 to facilitate the folding of the airbag 1.

[0029] There are three sewing patterns 2. The sewing patterns 2 at both ends are microphone-shaped. The sewing pattern 2 in the middle is a trapezoid with the bottom edge removed and forms a bent air guide channel 5 with the sealing area 6, which connects the front and rear of the main air chamber and is used to control the overall unfolding thickness of the air bag 1 and the direction of airflow.

[0030] During installation, the gas generator 9 is inserted into the air inlet of the air bag 1. The air bag 1, gas generator 9, and generator bracket 10 are then secured together using two clamps. The air bag 1 is folded using a folding machine in an up-U, down-rolling manner. The folded air bag 1 is then placed inside the integrated protective sleeve 11. The cross-sectional dimension of the folded air bag 1 is controlled to be φ32, providing good restraint and a good fit with the vehicle body. Finally, the air bag 1 is fixed to the side panel of the vehicle body with screws using the generator bracket 10 and the air bag fixing piece 8 clipped onto the air bag lug 4.

[0031] like Figure 7 and Figure 8 As shown, when a side collision occurs, the gas generated by the gas generator 9 enters the inner cavity of the airbag 1, inflating and expanding the airbag. The gas then enters the main air chamber of the airbag through the heat-insulating gas guide assembly 3 and then enters the small air chamber 102. Due to the spatial constraint between the side panel of the vehicle body and the main air chamber, the small air chamber 102 inflates and expands. After the airbag is fully deployed, a large bladder and an additional small bladder are created between the rear passengers and the side panel of the vehicle body, forming a double protective barrier. This effectively reduces the risk of rear passengers' bodies shifting and their heads protruding out of the window during a side collision in some cars with low C-pillars, reducing head injuries and providing good protection for the occupants.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A side curtain airbag for a vehicle, comprising a bag, an obliquely arranged air inlet at the upper middle part of the bag, and a heat-insulating air guide assembly corresponding to the air inlet in the bag; a plurality of bag tabs are arranged at the upper end of the bag on both sides of the air inlet; a plurality of sewing patterns are arranged along the longitudinal direction of the bag, for controlling the unfolding thickness of the bag and the flow direction of the air; characterized in that: a rectangular small air cavity is arranged at the upper end of the rear part of the bag, the small air cavity is folded towards the side of the bag and communicates with the main air cavity in the bag through a reduced diameter, so that after the bag is completely unfolded, a double protection barrier of two sizes is formed between the rear passenger and the side panel of the vehicle body. In The edge of the small air cavity is folded and sutured with the edge of the rear end of the bag by a thin thread, so as to facilitate the folding of the bag.

2. The side curtain airbag of claim 1, wherein: The bag is connected by gluing and sewing thread by two bag pieces, a triangular sealing area is formed at the lower middle part of the bag by sewing thread, so as to control the unfolding thickness of the bag and improve the unfolding speed.

3. The side curtain airbag of claim 1, wherein: The sewing pattern is three, of which the sewing patterns at both ends are microphone-shaped; the sewing pattern in the middle is a trapezoidal shape without a bottom edge and forms a bent air guide channel for communicating the front and rear parts of the main air cavity, for controlling the overall unfolding thickness of the bag and the flow direction of the air.

4. The side curtain air bag of claim 3, wherein: The heat-insulating air guide assembly comprises a bag lining and two bag heat-insulating sheets, the bag lining is folded and the bottom edge is folded inward and sutured with each other, forming a three-way structure with an air inlet and two air outlets, so as to limit the flow direction of the air entering the bag; the two bag heat-insulating sheets are fixed in the air inlet at the upper part of the bag lining by sewing thread after being overlapped, so as to prevent the bag from being burned through by high temperature when it is detonated.

5. An automotive side curtain airbag according to any one of claims 1 to 4, characterized in that: ​

Images