Side curtain device and folding method

Abstract

The application provides a side air curtain device and folding method, relates to the technical field of automobile safety, and comprises an air bag body and a gas generator. The air bag body comprises a main cavity, a guide air bag and a small air bag cavity. The main cavity is formed by a main cloth piece one and a main cloth piece two. The main cloth piece one is arranged close to a metal plate side, and the main cloth piece two is arranged close to a passenger side. The guide air bag is arranged in the small air bag cavity, the gas generator is installed in the guide air bag, and the guide air bag is provided with a flow guide hole. The gas generator generates gas to flow into the guide air bag, the flow guide hole guides the gas flowing into the guide air bag to the small air bag cavity, and the two sides of the small air bag cavity along the vehicle length direction are in a tearable state or an open state. After the gas in the guide air bag flows into the small air bag cavity, the small air bag cavity is inflated and breaks through the two sides of the small air bag cavity to flow into the main cavity. By arranging the main cavity, the guide air bag and the small air bag cavity, the air bag body can cross over and not damage the pillar trim panel when being unfolded, and the structure is simple and easy to install.

Description

Technical Field

[0001] This application relates to the field of automotive safety technology, specifically to a side curtain airbag device and its folding method. Background Technology

[0002] With the rapid development of the automotive industry, the market has placed higher demands on automotive passive safety. The area that side curtain airbags need to cover has increased, and the height and dimensions of the airbags after being laid flat have increased, leading to larger bag sizes and higher requirements for installation space within the vehicle.

[0003] When the curtain airbag is deployed, it needs to be able to pass over the pillar trim panel. Currently, the main methods to ensure that the curtain airbag can pass over the pillar trim panel are: 1. Connecting a guide to the curtain airbag. The guide guide allows the curtain airbag to pass over the pillar trim panel and be deployed smoothly. However, the connection between the guide and the curtain airbag is unstable, which may cause the curtain airbag to get stuck in the pillar trim panel and fail to be deployed smoothly, or damage the pillar trim panel during deployment and produce hard flying debris. 2. Folding the airbag body at the pillar trim panel to obtain a multi-fold structure. The multi-fold structure can be Z-fold or U-fold. During the deployment of the curtain airbag device, the multi-fold structure will move laterally towards the inside of the vehicle, allowing the curtain airbag to pass over the pillar trim panel and be deployed smoothly. However, the folding process of the multi-fold structure is complicated and costly.

[0004] Therefore, a new solution is needed that can meet the performance requirements of air curtains while simplifying the folding process. Summary of the Invention

[0005] In view of this, the embodiments of this specification provide a side air curtain device and folding method, which can smoothly pass over the column trim panel when unfolded without damaging the column trim panel, and at the same time has a simple structure and is easy to install.

[0006] The embodiments in this specification provide the following technical solutions:

[0007] This specification provides a side curtain air device, including an air bag body and a gas generator. The air bag body includes a main chamber, an air guide bag, and a small air bag chamber located in the main chamber.

[0008] The main chamber is formed by main fabric piece one and main fabric piece two sealing and fixing each other. Main fabric piece one is located near the sheet metal side, and main fabric piece two is located near the passenger side.

[0009] The air guide bag is disposed in the small air bag chamber, the gas generator is installed in the air guide bag, and the air guide bag is provided with a flow guide hole;

[0010] The gas generator is used to generate gas to enter the gas guide bag, and the guide hole is used to guide the gas flowing into the gas guide bag to the small gas bag chamber.

[0011] The small airbag chamber is either tearable or open on both sides along the length of the vehicle.

[0012] After the gas in the air guide bag flows into the small air bag chamber, the small air bag chamber bulges up and breaks through the small air bag chamber to flow into the main chamber along both sides of the vehicle length direction.

[0013] With the above technical solution, after the gas generator produces gas, it first enters the air guide bag and quickly fills the air guide bag. Then, the gas flows from the guide hole to the small air bag chamber, causing the small air bag chamber to bulge. Through the reaction force on the sheet metal side, the uninflated area of ​​the air bag body will quickly gain an unfolding force away from the sheet metal side. At the same time, the two sides of the small air bag chamber in the length direction are in a tearable or open state. After the small air bag chamber is inflated and unfolded, the gas will quickly flow to the two sides of the small air bag chamber in the length direction, so that the uninflated area of ​​the air bag body will quickly gain an unfolding force along the length direction. At this time, the uninflated area of ​​the air bag body can pass through the pillar trim panel and unfold smoothly. Since no additional guide structure is added, it will not damage the pillar trim panel, reducing safety hazards. Moreover, the entire air bag body does not need to use a Z-fold or U-fold folding method, making the structure simpler. It can achieve disordered folding or roll folding on this basis, making the overall installation more convenient and effectively reducing the overall cost.

[0014] Preferably, the small air bag chamber is formed by a partition sheet disposed on the main fabric sheet and the main fabric sheet;

[0015] The upper edge of the partition sheet is fixed to the main fabric sheet, and the lower edge of the partition sheet is fixed to the main fabric sheet by tear-resistant adhesive.

[0016] Both sides of the partition sheet along the length of the vehicle are fixed to the main fabric sheet or are open.

[0017] Preferably, the adhesive coating between the two sides of the partition sheet and the main fabric sheet along the length of the vehicle is fully coated.

[0018] Preferably, the partition sheet and the main fabric sheet are fixed together by sealant.

[0019] The above technical solution ensures that the side of the small air bag chamber closest to the second main fabric piece is closed, thereby effectively avoiding errors during air bag installation and improving the convenience of air bag installation.

[0020] Preferably, the main chamber is provided with an installation port for inserting a gas generator;

[0021] The partition sheet and the second main fabric sheet are sealed and fixed together at the installation opening by sealant.

[0022] The above technical solution not only improves the ease of installing the air duct bag, but also enhances the 6S pressure holding capability of the overall structure.

[0023] Preferably, the partition sheet has an overflow hole, and the sealant connects the first main fabric sheet, the partition sheet, and the second main fabric sheet through the overflow hole.

[0024] The above technical solution allows the sealant on the first main fabric piece to overflow through the overflow hole and connect with the second main fabric piece, reducing the sealing gap caused by the second partition layer.

[0025] Preferably, the air guide hole is located on the side of the air guide bag closest to the sheet metal.

[0026] Preferably, an outer pull strap is provided on the outer side of the second main fabric piece;

[0027] The outer pull strap is configured to limit the bulging height of the small airbag chamber near the occupant side when the small airbag chamber is inflated and deployed.

[0028] By using the above technical solution, an external pull strap is set to restrict the inflation state of the small airbag chamber and provide a reverse force to the small airbag chamber, so that the small airbag chamber can bulge more stably toward the sheet metal side. This ensures that the uninflated area of ​​the airbag body can stably obtain an unfolding force away from the sheet metal side during the unfolding process, thereby improving the reliability of the unfolding process.

[0029] Preferably, the air guide bag is provided with a vent hole, and the position of the vent hole on the air guide bag does not overlap with the edge seam area of ​​the air guide bag.

[0030] By using the above technical solution, a vent hole is provided so that the airflow in the air bag can be discharged through the vent hole before reaching the seam area, thereby reducing the impact of the airflow on the seam and protecting the integrity of the seam.

[0031] This specification also provides a folding method for a side curtain air device, wherein the side curtain air device described in any of the above embodiments can be folded by random folding or rolling.

[0032] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0033] By setting up a main chamber, an air guide bag, and a small air bag chamber, when the gas generator produces gas, it first enters the air guide bag and quickly fills it. Then, the gas flows from the guide hole to the small air bag chamber, causing the small air bag chamber to bulge near the sheet metal side. Through the reaction force of the sheet metal side, the uninflated area of ​​the air bag body quickly gains an unfolding force away from the sheet metal side. At the same time, the two sides of the small air bag chamber in the length direction of the vehicle are in a tearable or open state. After the small air bag chamber is inflated and unfolded, the gas will quickly flow to the two sides of the small air bag chamber in the length direction of the vehicle, so that the uninflated area of ​​the air bag body quickly gains an unfolding force along the length direction of the vehicle. At this time, the uninflated area of ​​the air bag body can pass over the pillar trim panel and unfold smoothly. Since no additional guide structure is added, it will not damage the pillar trim panel, reducing safety hazards. Moreover, the entire air bag body does not need to use a Z-fold or U-fold folding method, making the structure simpler. It can achieve disordered folding or roll folding based on this structure, making the overall installation more convenient and effectively reducing the overall cost. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a side curtain air device in this application;

[0036] Figure 2 This is a schematic diagram of the flat laying of main fabric piece one and main fabric piece two in this application;

[0037] Figure 3 yes Figure 1 Schematic diagram of the structural cross-section at point AA;

[0038] Figure 4 This is a schematic diagram of the interlayer sheet in this application laid out.

[0039] Figure 5 This is a schematic diagram of the air-conducting bag in this application laid out.

[0040] Figure 6 yes Figure 1 Schematic diagram of the structural cross-section at point BB.

[0041] Reference numerals: 1. Airbag body; 2. Main chamber; 201. Main fabric piece one; 202. Main fabric piece two; 3. Air guide bag; 4. Small airbag chamber; 5. Sealant; 6. Bag suture line; 7. Spacer; 8. Overflow hole; 9. Tearable adhesive; 10. Installation port; 11. Drain hole; 12. External pull strap; 13. Vent hole. Detailed Implementation

[0042] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0043] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0045] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0047] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0048] like Figure 1 As shown in the figure, this specification provides a side curtain air device, including an air bag body 1 and a gas generator (not shown in the figure).

[0049] The air bag body 1 includes a main chamber 2, an air guide bag 3, and a small air bag chamber 4.

[0050] like Figure 1 and Figure 2 As shown, the main chamber 2 is formed by the mutual sealing and fixing of the main fabric piece 1 201 and the main fabric piece 202, and the main fabric piece 1 201 and the main fabric piece 202 are mutually sealed and fixed by sealant 5.

[0051] like Figure 1 and Figure 3 As shown, furthermore, a pouch sewing line 6 is sewn onto the sealant 5 of the sealing and fixing main fabric piece 1 201 and main fabric piece 202. The sewing position of the pouch sewing line 6 is located in the middle area of ​​the sealant 5, so as not to affect the sealing effect of the sealant 5, and to improve the connection strength between the main fabric piece 1 201 and main fabric piece 202.

[0052] like Figure 1 , Figure 3 and Figure 4 As shown, the small airbag chamber 4 is located inside the main chamber 2, and the small airbag chamber 4 is formed by the partition sheet 7 and the main fabric sheet 201 disposed on the main fabric sheet 201.

[0053] The upper edge of the partition sheet 7 near the main fabric sheet 201 has a connecting area, which corresponds to the sealant application area on the upper edge of the main fabric sheet 201. Several overflow holes 8 are provided in the connecting area, through which the sealant 5 on the upper edge of the main fabric sheet 201 overflows to the side of the partition sheet 7 near the main fabric sheet 202 and adheres to it, thus sealing the upper edge of the partition sheet 7 with the upper edges of both the main fabric sheet 201 and the main fabric sheet 202.

[0054] The lower edge of the partition sheet 7 is fixed to the main fabric sheet 201 with tear-resistant adhesive 9, and both sides of the partition sheet 7 along the length of the vehicle are fixed to the main fabric sheet 201 with tear-resistant adhesive 9. The adhesive coating between the partition sheet 7 and the main fabric sheet 201 along the length of the vehicle is fully applied. This allows gas to break through the small air bag chamber 4 on both sides along the length of the vehicle and flow into the main chamber 2 after it flows into the small air bag chamber 4.

[0055] Alternatively, the tear-resistant adhesive 9 may not be applied to the two sides of the partition sheet 7 along the vehicle length direction, so that the small air bag chamber 4 is open on both sides along the vehicle length direction. Alternatively, the amount of adhesive applied per unit area on both sides of the partition sheet 7 along the vehicle length direction may be less than the amount of adhesive applied per unit area at the lower edge of the partition sheet 7.

[0056] Furthermore, the edge areas of the partition sheet 7, excluding the connecting area, are all fixedly connected to the main fabric sheet 201 by tear-resistant adhesive 9.

[0057] The gas guide bag 3 is installed inside the small gas bag chamber 4 for the installation of the gas generator. To facilitate the installation of the gas generator inside the gas guide bag 3, an installation port 10 is provided above the main chamber 2. The small gas bag chamber 4 has an inlet 1 at the installation port 10, and the gas guide bag 3 has an inlet 2 at the installation port 10. The gas generator is installed inside the gas guide bag 3 through the installation port 10, inlet 1, and inlet 2 in sequence, and is secured by clamps and buckles.

[0058] The spacer 7 and the inner surface of the main fabric piece 202 at the mounting port 10 are sealed and fixed with sealant 5, so that the spacer 7 is sealed at the mounting port 10 on the side close to the main fabric piece 202, effectively preventing the gas generator from being installed on the side of the spacer 7 close to the main fabric piece 202, while the overall sealing effect is better and the 6S pressure holding capacity is improved.

[0059] like Figure 1 and Figure 5 As shown, the air guide bag 3 has several guide holes 11 on the side near the sheet metal. In actual use, when the gas generator produces gas, the gas will quickly fill the air guide bag 3. After filling the air guide bag 3, the gas overflows from the guide holes 11 and flows into the small air bag chamber 4, causing the side of the small air bag chamber 4 near the sheet metal to bulge rapidly. Through the reaction force of the sheet metal side on the small air bag chamber 4, the remaining uninflated areas of the air bag body 1 quickly gain an unfolding force away from the sheet metal side. At the same time, the gas will also break through the two sides of the small air bag chamber 4 along the vehicle length direction, allowing the remaining uninflated areas of the air bag body 1 to quickly gain an unfolding force along the two sides of the vehicle length direction. The combination of the unfolding force away from the sheet metal side and the unfolding force along the two sides of the vehicle length direction allows the uninflated areas of the air bag body 1 to extend out of the pillar trim panel and unfold smoothly. Since no additional guide structure is added, there is no unstable connection, nor will it damage the pillar trim panel, thus reducing safety hazards. The entire airbag body 1 does not require Z-folding or U-folding. The requirements for the folding method are not high. It can be folded without folding or rolled up, making it more convenient to install on the vehicle and effectively reducing the overall usage cost.

[0060] Alternatively, the air guide holes 11 on the air guide bag 3 can be respectively opened on both sides of the air guide bag 3, and the diameter of the air guide holes 11 closer to the sheet metal side is larger than the diameter of the air guide holes 11 farther from the sheet metal side. Alternatively, the number of air guide holes 11 closer to the sheet metal side is greater than the number of air guide holes 11 farther from the sheet metal side. As long as the air output of the air guide bag 3 closer to the sheet metal side is greater than the air output of the air guide bag 3 farther from the sheet metal side, it can be achieved, thereby ensuring that the side of the small air bag chamber 4 closer to the sheet metal side bulges first.

[0061] Furthermore, each side of the air vent 3 is provided with a vent hole 13, which is located near the edge seam area of ​​the air vent 3 and does not overlap with the edge seam area. By providing the vent hole 13, the airflow inside the air vent 3 is discharged through the vent hole 13 before reaching the edge seam area, reducing the impact of the airflow on the seam and protecting the integrity of the seam.

[0062] In other embodiments, the vent 13 may also be located in the middle area of ​​the side of the air guide bag 3.

[0063] like Figure 1 and Figure 6 As shown, to further limit the inflating height of the small airbag chamber 4, an outer pull strap 12 is provided on the outer side of the main fabric piece 202. The two ends of the outer pull strap 12 are fixed to the outer side of the main fabric piece 202, and the middle of the outer pull strap 12 is the movable area. Several outer pull straps 12 are provided, distributed sequentially along the length of the vehicle on the side of the small airbag chamber 4 away from the sheet metal. When the middle part of the outer pull strap 12 is in the open state, the height of the open section is less than or equal to half the thickness of the small airbag chamber 4 when fully inflated. This limits the inflating state of the small airbag chamber 4, confining it to the side closer to the sheet metal. This increases the reverse force exerted by the sheet metal on the uninflated area of ​​the airbag body 1, making it easier for the airbag body 1 to emerge from the pillar trim during inflation.

[0064] This specification also provides a folding method for a side air curtain device. Any of the side air curtain devices described above can be folded randomly or rolled up, and the folded air bag body 1 is wrapped and shaped by a dust cover.

[0065] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the product embodiments described later are relatively simple since they correspond to the methods; relevant parts can be referred to the descriptions in the system embodiments.

[0066] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A side curtain air device, comprising an air bag body (1) and a gas generator, characterized in that, The air bag body (1) includes a main chamber (2), an air guide bag (3), and a small air bag chamber (4) located in the main chamber (2); The main chamber (2) is formed by sealing and fixing the main fabric piece one (201) and the main fabric piece two (202) together. The main fabric piece one (201) is located near the sheet metal side, and the main fabric piece two (202) is located near the passenger side. The air guide bag (3) is disposed in the small air bag chamber (4), the gas generator is installed in the air guide bag (3), and the air guide bag (3) is provided with a flow guide hole (11), which is opened on the side of the air guide bag (3) close to the sheet metal. The gas generator is used to generate gas to enter the gas guide bag (3), and the guide hole (11) is used to guide the gas flowing into the gas guide bag (3) to the small gas bag chamber (4); The small airbag chamber (4) is either tearable or open on both sides along the length of the vehicle. After the gas in the air guide bag (3) flows into the small air bag chamber (4), the small air bag chamber (4) bulges up and breaks through the small air bag chamber (4) and flows into the main chamber (2) along both sides of the vehicle length direction.

2. The side curtain air device according to claim 1, characterized in that, The small air bag chamber (4) is formed by the partition sheet (7) disposed on the main fabric sheet (201) and the main fabric sheet (201); The upper edge of the partition sheet (7) is fixed to the main fabric sheet (201), and the lower edge of the partition sheet (7) is fixed to the main fabric sheet (201) by tear-resistant adhesive. The partition sheet (7) is fixed to the main fabric sheet (201) on both sides along the length of the vehicle by tearable adhesive (9) or is in an open state.

3. The side curtain air device according to claim 2, characterized in that, The adhesive coating between the two sides of the partition sheet (7) and the main fabric sheet (201) along the length of the vehicle is fully applied.

4. The side curtain air device according to claim 2, characterized in that, The partition sheet (7) and the main fabric sheet (202) are fixed together by sealant (5).

5. The side curtain air device according to claim 4, characterized in that, The main chamber (2) is provided with an installation port (10) for the gas generator to be installed; The partition sheet (7) and the inner surface of the main fabric sheet (202) located at the mounting opening (10) are sealed and fixed by sealant (5).

6. The side curtain air device according to claim 5, characterized in that, The partition sheet (7) has an overflow hole (8), and the sealant (5) connects the main fabric sheet one (201), the partition sheet (7) and the main fabric sheet two (202) through the overflow hole (8).

7. The side curtain air device according to claim 1, characterized in that, An outer pull strap (12) is provided on the outer side of the main fabric piece two (202); The outer pull strap (12) is configured to limit the bulging height of the small airbag chamber (4) near the occupant side when the small airbag chamber (4) is inflated and deployed.

8. The side curtain air device according to claim 1, characterized in that, The air guide bag (3) is provided with an air vent (13), and the position of the air vent (13) on the air guide bag (3) does not overlap with the edge seam area on the air guide bag (3).

9. A folding method for a side curtain air device as described in any one of claims 1-8, characterized in that, All of the side curtain air devices can be folded randomly or rolled up.

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