Far-end air bag

Abstract

The embodiment of the invention provides a far-end airbag which comprises a main cavity, an auxiliary cavity and a gas generator, the gas generator is communicated with the main cavity, the main cavity is provided with a non-inflation area and an external drawstring, the auxiliary cavity is fixed to the main cavity through a connecting section provided with a plurality of communicating holes, and when the far-end airbag is unfolded, the non-inflation area is communicated with the external drawstring. The external drawstring pulls the main cavity to be bent in the non-inflation area to form an upper cavity and a lower cavity which extend at an angle, a first channel and a second channel which enable the upper cavity and the lower cavity to be communicated are formed in the two sides of the main cavity respectively, and at least part of the communication hole is formed below the non-inflation area. The ratio of the width of the non-inflation area to the sum of the widths of the first channel and the second channel is 0.9-1.3. By designing the size proportion of the non-inflation areas and the positions of the communication holes, air in the lower cavity can enter the auxiliary cavity more quickly when flowing into the upper cavity, it can be guaranteed that the filling time of the auxiliary cavity is not larger than the filling time of the upper cavity, and it is guaranteed that the auxiliary cavity is unfolded in place in time.

Description

Technical Field

[0001] The present invention relates to the field of vehicle safety technology, and in particular to a remote airbag. Background Art

[0002] The remote airbag is a passive safety system, usually designed between the driver and the passenger, and installed on the inside of the front seat, especially on the inside of the main driver's seat backrest. It adopts the design of two large-volume cavities for the head and chest. After the airbag is detonated, it can be supported between the two seats to provide effective safety protection. In order to achieve safety protection for the front passenger's head, some remote airbags will adopt a dual-chamber structure, protecting the front passenger through a secondary chamber that is deployed toward the front passenger seat. However, the deployment speed of the secondary chamber is generally slow, resulting in a relatively general head protection effect for the front passenger. Summary of the invention

[0003] In view of this, an embodiment of the present specification provides a distal airbag, by designing the size ratio of the non-inflated area and the position of the connecting hole, the connecting hole is at least partially arranged below the non-inflated area, so that the gas in the lower cavity can enter the sub-cavity more quickly when flowing into the upper cavity, and the ratio of the sum of the widths of the first channel and the second channel formed on both sides of the non-inflated area is 0.9 to 1.3, which can ensure that the filling time of the sub-cavity is not greater than the filling time of the upper cavity, thereby ensuring that the sub-cavity is deployed in place in time and reducing occupant injuries.

[0004] The embodiments of this specification provide the following technical solutions: a distal airbag, comprising a main cavity, a secondary cavity and a gas generator, wherein the gas generator is connected to the main cavity, the main cavity is provided with a non-inflatable area and an external drawstring, one end of the secondary cavity is fixed to the main cavity through a connecting section provided with a plurality of connecting holes, when the distal airbag is inflated and deployed, the external drawstring pulls the main cavity to bend in the non-inflatable area to form an upper cavity and a lower cavity extending at an angle to each other, and the other end of the secondary cavity is deployed in a direction away from the main cavity,

[0005] The non-inflatable area is along the width direction of the main cavity and is placed within the projection area of ​​the connecting section, and a first channel and a second channel are formed on both sides thereof to connect the upper cavity and the lower cavity, respectively. The plurality of connecting holes are at least partially arranged below the non-inflatable area, and the ratio of the width of the non-inflatable area to the sum of the widths of the first channel and the second channel is 0.9 to 1.3, so that the filling time of the secondary cavity is not greater than the filling time of the upper cavity.

[0006] Preferably, the total area of ​​the plurality of communicating holes accounts for 0.8 to 1 of the area of ​​the non-inflated region.

[0007] Preferably, the distance between the first channel and the gas generator is greater than the distance between the second channel and the gas generator, the width of the first channel is smaller than the width of the second channel, and at least one of the connecting holes is distributed in the second channel.

[0008] Preferably, the communicating hole includes a communicating hole distributed below the central axis of the non-inflated area and located at the second channel.

[0009] Preferably, the main cavity includes a first panel and a second panel, and the edges of the first panel and the second panel are sewn by a first peripheral line to form the main cavity. The non-inflatable area extends along the front-to-rear direction of the vehicle and is configured to be formed by fixing the first panel and the second panel by gluing and / or sewing. The secondary cavity includes a third panel, and is configured to be formed by folding the third panel in half and sewing it by a second peripheral line. The connecting section also includes a circumferential closed seam, which is arranged on a side panel at the fold and / or near the fold, and is configured to fix the third panel and the second panel, and surround the connecting hole and the non-inflatable area.

[0010] Preferably, the ratio of the height of the non-inflated area to its width is 0.15-0.4, so that after the upper cavity is filled and bent, the upper cavity and the lower cavity are isolated from each other.

[0011] Preferably, along the width direction of the main cavity, the central axis of the non-inflated area is located higher than the central axis of the connecting section.

[0012] Preferably, an obtuse angle is formed between the auxiliary cavity and the upper cavity, so that the main cavity and the auxiliary cavity support each other.

[0013] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0014] By designing the size ratio of the non-inflatable area and the position of the connecting hole, the connecting hole is at least partially arranged below the non-inflatable area, so that the gas in the lower cavity can enter the sub-cavity more quickly when flowing into the upper cavity. The ratio of the sum of the widths of the first channel and the second channel formed on both sides of the non-inflatable area is 0.9 to 1.3, which can ensure that the filling time of the sub-cavity is not greater than the filling time of the upper cavity, and ensure that the sub-cavity is deployed in place in time to reduce occupant damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of delayed deployment of the secondary cavity in the prior art;

[0017] Figure 2 It is a schematic diagram of the structure of synchronous deployment of distal airbags provided by the present application;

[0018] Figure 3 It is a schematic diagram after the distal airbag provided by the present application is sewn;

[0019] Figure 4 is a schematic diagram of the distal airbag sewing process provided by the present application;

[0020] Figure 5 The left picture is a schematic diagram of the panels of the distal airbag after they are sewn together, and the right picture is a cross-sectional view at AA in the left picture.

[0021] In the figure, 1, main cavity; 101, upper cavity; 102, lower cavity; 2, sub-cavity; 3, external pull belt; 4, gas generator; 5, connecting section; 6, connecting hole; 7, non-inflated area; 8, first channel; 9, second channel; 10, first panel; 11, second panel; 12, third panel; 13, first outer perimeter; 14, second outer perimeter; 15, central axis of non-inflated area. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0023] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0024] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an 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 aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0026] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0027] In order to better protect the head of the front passenger, some existing remote airbags adopt a dual-chamber structure. The secondary chamber is mainly used to protect the head of the occupant when the vehicle collides. The time when the secondary chamber is deployed is critical and directly reflects the protection effect on the occupant. If the secondary chamber is deployed slowly, such as Figure 1 The "bad deployment" shown is: when the vehicle has a side collision, the occupant moves laterally, and the head has moved to the top of the center console while the secondary cavity has not yet fully deployed. The restraint performance on the occupant will be greatly reduced, the occupant will be further displaced, and the occupant's head may even come into hard contact with the seat or the main driver's torso, causing greater damage.

[0028] The inventor has designed a distal airbag after extensive and intensive experiments.

[0029] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0030] like Figure 2-Figure 3As shown, a distal airbag comprises a main cavity 1, a secondary cavity 2 and a gas generator 4, wherein the gas generator 4 is connected to the main cavity 1, the main cavity 1 is provided with a non-inflatable area 7 and an external drawstring 3, one end of the secondary cavity 2 is fixed to the main cavity 1 through a connecting section 5 provided with a plurality of communicating holes 6, when the distal airbag is inflated and deployed, the external drawstring 3 pulls the main cavity 1 to bend in the non-inflatable area 7 to form an upper cavity 101 and a lower cavity 102 extending at an angle to each other, and the other end of the secondary cavity 2 is deployed in a direction away from the main cavity 1,

[0031] The non-inflatable area 7 is arranged along the width direction of the main cavity 1 and is placed within the projection area of ​​the connecting section 5. A first channel 8 and a second channel 9 are respectively formed on both sides thereof to connect the upper cavity 101 and the lower cavity 102. The plurality of connecting holes 6 are at least partially arranged below the non-inflatable area 7. The ratio of the width A of the non-inflatable area 7 to the sum of the width C of the first channel 8 and the width B of the second channel 9 is 0.9 to 1.3, so that the filling time of the sub-cavity 2 is not greater than the filling time of the upper cavity 101.

[0032] When the vehicle is hit and the gas generator 4 is ignited, the gas generator 4 fills gas into the main cavity 1, and the main cavity 1 begins to expand. Under the action of the external pull strap 3, the main cavity 1 bends along the non-inflation area 7 to form an upper cavity 101 and a lower cavity 102 extending at an angle to each other, and the auxiliary cavity 2 expands in the direction close to the front passenger seat.

[0033] During the deployment of the airbag, the portion of the main cavity 1 connected to the gas generator 4 is first inflated and expanded to form the lower cavity 102. As the gas generator 4 continues to fill the lower cavity 102 with gas, part of the gas in the lower cavity 102 enters the sub-cavity 2 through the multiple connecting holes 6, and the sub-cavity 2 is inflated. At the same time, part of the gas in the lower cavity 102 enters the upper cavity 101 of the main cavity 1 through the first channel 8 and the second channel 9 formed on both sides of the non-inflatable area 7. The multiple connecting holes 6 are at least partially arranged below the non-inflatable area 7, so that the gas in the lower cavity 102 can enter the sub-cavity 2 more quickly when flowing into the upper cavity 101. The ratio of the width A of the non-inflatable area 7 to the sum of the widths of the first channel 8 and the second channel 9 formed on both sides thereof is 0.9 to 1.3, which can ensure that the filling time of the sub-cavity 2 is not greater than the filling time of the upper cavity 101, and ensure that the sub-cavity 2 is deployed in place in time to reduce occupant injury.

[0034] like Figure 3 and Figure 5As shown, in some embodiments, the total area of ​​the plurality of communicating holes 6 accounts for 0.8 to 1 of the area of ​​the non-inflatable area 7, and the ratio of the sum of the areas of the plurality of communicating holes 6 to the area of ​​the non-inflatable area 7 is 0.8 to 1, thereby ensuring the area in which the main cavity 1 is connected to the sub-cavity 2, thereby facilitating the rapid entry of the gas in the main cavity 1 into the sub-cavity 2, thereby ensuring the expansion speed of the sub-cavity 2.

[0035] like Figure 3 As shown, in some embodiments, the distance between the first channel 8 and the gas generator 4 is greater than the distance between the second channel 9 and the gas generator 4, the width C of the first channel 8 is smaller than the width B of the second channel 9, at least one connecting hole 6 is distributed in the second channel 9, the second channel 9 is located on the side of the non-inflation area 7 close to the gas generator 4, and the width B of the second channel 9 is greater than the width C of the first channel 8, and the gas flow rate from the second channel 9 to the upper cavity 101 of the lower cavity 102 is greater than the gas flow rate from the first channel 8. By setting at least one connecting hole 6 in the second channel 9, the gas in the main cavity 1 can flow into the sub-cavity 2 faster while ensuring smooth airflow, so that the sub-cavity 2 can be deployed in place in time.

[0036] like Figure 3 As shown, in some embodiments, the connecting hole 6 includes a connecting hole 6 distributed below the central axis 15 of the non-inflatable area and located at the second channel 9. Since the width B of the second channel 9 is greater than the width C of the first channel 8, and at the same time, the distance between the second channel 9 and the gas generator 4 is less than the distance between the first channel 8 and the gas generator 4, the gas flow rate flowing through the second channel 9 must be greater than the gas flow rate flowing through the first channel 8. The connecting hole 6 is provided at the second channel 9 to facilitate the gas flowing through the second channel 9 to enter the sub-cavity 2, thereby ensuring the expansion speed of the sub-cavity 2. At the same time, the connecting hole 6 is below the central axis 15 of the non-inflatable area (i.e., the folding line of the main cavity 1), thereby ensuring that the gas in the lower cavity 102 will enter the sub-cavity 2 first, ensuring that the air intake of the connecting hole is not hindered by the bending process of the main cavity 1, and the expansion time of the sub-cavity 2 is not greater than the expansion time of the upper cavity 101.

[0037] like Figure 4-Figure 5As shown, in some embodiments, the main cavity 1 includes a first panel 10 and a second panel 11, and the edges of the first panel 10 and the second panel 11 are sewn by a first peripheral line 13 to form the main cavity 1, and the non-inflatable area 7 extends along the front and rear direction of the vehicle, and is configured to fix the first panel 10 and the second panel 11 by gluing and / or sewing. The secondary cavity 2 includes a third panel 12, which is configured to be folded in half and then sewn by a second peripheral line 14, and the connecting section 5 also includes a circumferential closed seam, which is arranged on a side panel at the folded portion and / or near the folded portion, and is configured to fix the third panel 12 and the second panel 11, and surround the connecting hole 6 and the non-inflatable area 7, and the main cavity 1 is formed by sewing the edges of the first panel 10 and the second panel 11 with the first peripheral line 13, and the non-inflatable area 7 is The area 7 extends along the front-to-back direction of the vehicle (i.e., the width direction of the main cavity 1), so that the main cavity 1 can be folded along the width direction to ensure the length of the first cavity and the upper cavity 101, thereby ensuring the comprehensive protection effect for the occupant. The third panel 12 and the second panel 11 of the secondary cavity 2 are connected by a circumferential closed stitching to form a connecting section 5, so as to realize the connection between the secondary cavity 2 and the main cavity 1. The secondary cavity 2 is formed by folding the third panel 12 in half and then sewing the edge with a second outer peripheral line 14. The circumferential closed stitching is on a side panel at the folding point and / or near the folding point of the third panel 12. At the same time, the connecting hole 6 and the non-inflatable area 7 are both arranged in the area formed by the connecting section 5, so as to ensure that the gas in the main cavity 1 can enter the secondary cavity 2 through the connecting hole 6, and when the main cavity 1 is bent along the non-inflatable area 7, when the distal airbag is deployed, the edge and / or near the edge of the secondary cavity 2 is connected to the bending point of the main cavity 1.

[0038] like Figure 4 As shown, the sewing method of the distal airbag is as follows:

[0039] A first panel 10, a second panel 11 and a third panel 12 are selected, and the first panel 10 and the third panel 12 are connected together by a circumferential closed stitch to form a connection section 5, and the sewing position is approximately at the upper part of the first panel 10 and the middle part of the panel of the secondary cavity 2, and the connection between the first panel 10 and the third panel 12 is realized by the connection section 5;

[0040] Align the first panel 10 and the second panel 11, and connect the first panel 10 and the second panel 11 together within the projection range of the connecting section 5 by gluing and / or sewing (the first panel 10, the second panel 11 and the panel of the sub-cavity 2 may also be sewn together at the same time), and form a non-inflatable area 7 between the first panel 10 and the second panel 11, and the non-inflatable area 7 extends along the width direction of the first panel 10 and the second panel 11;

[0041] The first panel 10 and the third panel 12 are opened, and the opening position is located in the connecting section 5 to form a connecting hole 6, so that the main cavity 1 and the auxiliary cavity 2 can be connected;

[0042] The main cavity 1 is formed by sewing along the edges of the first panel 10 and the second panel 11 through the first peripheral line 13, and the third panel 12 is folded in half and then sewn along the edge through the second peripheral line 14;

[0043] The main cavity 1 is folded along the non-inflated area 7, and the folded main cavity 1 is connected by an external drawstring 3. After the main cavity 1 is folded along the non-inflated area 7, an external drawstring 3 is provided on both sides of the main cavity 1, and the two ends of the external drawstring 3 are respectively connected to the two parts of the bent main cavity 1, and the ends of the external drawstring 3 can be sewn respectively at the edge contours of the two parts of the main cavity 1.

[0044] It should be noted that, in general, the non-inflatable area 7 can be formed by sealing seams, that is, a closed area is sewn by sealing seams. In other embodiments, it can also be formed by gluing or other methods. It is only necessary to ensure that the gas is difficult to enter or can only enter the area in a relatively slow manner; the sealing seams are adjacent to the first channel 8 and the second channel 9 in an arc shape to prevent the panel from being torn due to the impact of high-speed airflow.

[0045] like Figure 3 As shown, in some embodiments, the ratio of the height D of the non-inflatable area 7 to its width A is 0.13-0.4, so that after the upper cavity 101 is filled and bent, the upper cavity 101 and the lower cavity 102 are isolated from each other, and when the main cavity 1 is inflated and expanded, it is bent along the non-inflatable area 7 to form the upper cavity 101 and the lower cavity 102. By designing the ratio of the height and width of the non-inflatable area 7, the height of the non-inflatable area 7 is much smaller than its width, ensuring that the upper cavity 101 and the lower cavity 102 are isolated from each other after inflation and expansion, so that after the upper cavity 101 is filled, the gas is effectively blocked from flowing back to the lower cavity 102.

[0046] like Figure 3 As shown, in some embodiments, along the width direction of the main cavity 1, the central axis 15 of the non-inflatable area is higher than the central axis of the connecting section 5, and the central axis 15 of the non-inflatable area is above the central axis of the connecting section 5, that is, the non-inflatable area 7 is in the upper area of ​​the connecting section 5, so as to facilitate the arrangement of the connecting hole 6 in the lower area of ​​the connecting section 5, and the main cavity 1 is folded along the central axis 15 of the non-inflatable area, that is, the folding line of the main cavity 1 is above the central axis of the connecting section 5, to ensure that the connecting hole 6 will not be affected when the upper part of the main cavity 1 is folded, and the integrity of the bag is good.

[0047] like Figure 2 As shown, in some embodiments, an obtuse angle is formed between the secondary cavity 2 and the upper cavity 101, so that the main cavity 1 and the secondary cavity 2 support each other. An obtuse angle is formed between the deployed secondary cavity 2 and the upper cavity 101, so that the main cavity 1 and the secondary cavity 2 support each other. When the main cavity 1 is hit, on the one hand, the reaction force of the secondary cavity 2 and the seat and / or the occupant on the other side can support the main cavity 1 to avoid a large displacement of the main cavity 1, thereby ensuring the protection effect on the occupant; on the other hand, the pushing effect of the seat occupant on the main cavity 1 provides support for the secondary cavity 2 extending toward the head and neck of the seat occupant on the other side, thereby preventing its displacement and ensuring the protection effect of the main cavity 1 on the occupant.

[0048] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment described later, since it corresponds to the system, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A distal airbag, comprising a main cavity, a secondary cavity and a gas generator, wherein the gas generator is connected to the main cavity, the main cavity is provided with a non-inflatable area and an external drawstring, one end of the secondary cavity is fixed to the main cavity through a connecting section provided with a plurality of connecting holes, when the distal airbag is inflated and deployed, the external drawstring pulls the main cavity to bend in the non-inflatable area to form an upper cavity and a lower cavity extending at an angle to each other, and the other end of the secondary cavity is deployed in a direction away from the main cavity, characterized in that: The non-inflatable area is along the width direction of the main cavity and is placed within the projection area of ​​the connecting section, and a first channel and a second channel are formed on both sides thereof to connect the upper cavity and the lower cavity, respectively. The plurality of connecting holes are at least partially arranged below the non-inflatable area, and the ratio of the width of the non-inflatable area to the sum of the widths of the first channel and the second channel is 0.9 to 1.3, so that the filling time of the secondary cavity is not greater than the filling time of the upper cavity.

2. The distal airbag according to claim 1, characterized in that: The total area of ​​the plurality of communication holes accounts for 0.8 to 1 of the area of ​​the non-air-filled region.

3. The distal airbag according to claim 1, characterized in that: The distance between the first channel and the gas generator is greater than the distance between the second channel and the gas generator, the width of the first channel is smaller than the width of the second channel, and at least one of the communication holes is distributed in the second channel.

4. The distal airbag according to claim 3, characterized in that: The communication hole includes a communication hole distributed below the central axis of the non-inflatable area and located at the second channel.

5. The distal airbag according to any one of claims 1 to 4, characterized in that: The main cavity includes a first panel and a second panel, and the edges of the first panel and the second panel are sewn by a first peripheral line to form the main cavity. The non-inflatable area extends along the front-to-rear direction of the vehicle and is configured to be formed by fixing the first panel and the second panel by gluing and / or sewing. The secondary cavity includes a third panel, and is configured to be formed by folding the third panel in half and sewing it by a second peripheral line. The connecting section also includes a circumferential closed seam, which is arranged on a side panel at the fold and / or near the fold, and is configured to fix the third panel and the second panel, and surround the connecting hole and the non-inflatable area.

6. The distal airbag according to claim 5, characterized in that: The ratio of the height of the non-inflated area to its width is 0.15-0.4, so that after the upper cavity is filled and bent, the upper cavity and the lower cavity are isolated from each other.

7. The distal airbag according to claim 5, characterized in that: Along the width direction of the main cavity, the central axis of the non-inflated area is located higher than the central axis of the connecting section.

8. The distal airbag according to claim 5, characterized in that: An obtuse angle is formed between the auxiliary cavity and the upper cavity, so that the main cavity and the auxiliary cavity support each other.

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