A double-chamber side distal automobile safety airbag structure and airbag folding method thereof

Abstract

The present invention discloses a dual-chamber side distal automobile safety airbag structure, which is installed in the side of the main driver's seat, including an airbag and a gas generator. The gas generator fills the airbag with gas in the event of a side collision, so that the airbag is quickly deployed and placed between the main driver's seat and the co-driver's seat; the airbag includes an upper chamber bag body and a lower chamber bag body arranged up and down, the upper chamber bag body and the lower chamber bag body are connected and at least one air guide channel is formed at the connection. A method for folding the airbag of the dual-chamber side distal automobile safety airbag structure is also disclosed. The present invention avoids collisions between passengers and can also prevent injuries caused by excessive lateral deflection of passengers.

Description

Technical Field

[0001] The invention relates to the technical field of automobile safety airbags, and in particular to a double-cavity side distal automobile safety airbag structure and an airbag folding method thereof. Background Art

[0002] Automobile airbags are a passive safety protection device. When used in conjunction with seat belts, they can provide effective anti-collision protection for passengers. When cars collide, automobile airbags can reduce the rate of head injuries by 25% and the rate of facial injuries by about 80%. In order to avoid collisions between passengers during side collisions, and to avoid injuries to the head and spine caused by excessive lateral displacement of passengers during collisions, side distal airbags have been developed to protect the head, torso and other parts of the passengers. Since passengers move a lot during side collisions, the distal side airbags are prone to being squeezed by passengers and then tipped over due to the lack of sufficient support, and cannot provide effective protection for passengers.

[0003] Therefore, the applicant has found a solution to the above-mentioned problem through beneficial exploration and research, and the technical solution to be introduced below is produced in this context. Summary of the invention

[0004] One of the technical problems to be solved by the present invention is to provide a double-chamber side distal automobile airbag structure which can avoid collision between passengers and provide stable support in view of the deficiencies of the prior art.

[0005] The second technical problem to be solved by the present invention is to provide an airbag folding method for the above-mentioned double-cavity side distal automobile safety airbag structure.

[0006] As a first aspect of the present invention, a dual-chamber side distal automobile safety airbag structure is installed in the side of the main driver's seat, and includes an airbag and a gas generator. The gas generator fills the airbag with gas when a side collision occurs, so that the airbag is quickly deployed and placed between the main driver's seat and the co-driver's seat; it is characterized in that:

[0007] The air bag comprises an upper cavity bag body and a lower cavity bag body which are arranged up and down. The upper cavity bag body and the lower cavity bag body are connected and at least one air guide channel is formed at the connection.

[0008] In a preferred embodiment of the present invention, the volume of the upper cavity bag body is smaller than the volume of the lower cavity bag body.

[0009] In a preferred embodiment of the present invention, at least one upper ventilation hole is provided at the connecting position of the upper cavity bag body and the lower cavity bag body, and at least one lower ventilation hole is provided at the connecting position of the lower cavity bag body and the upper cavity bag body. The upper cavity bag body and the lower cavity bag body are connected by sewing, and during sewing, each upper ventilation hole of the upper cavity bag body is connected with each lower ventilation hole of the lower cavity bag body, and the upper ventilation holes are connected with the lower ventilation holes to form the air guiding channel.

[0010] In a preferred embodiment of the present invention, the coverage range of the upper chamber bag body after unfolding is: upwardly covering to the highest point of the occupant's head, forwardly covering to the forwardmost position that the occupant's torso can move after a lateral collision, and backwardly covering to the maximum backward position that the occupant's torso can move when the occupant is sitting; the coverage range of the lower chamber bag body after unfolding is: downwardly covering to the occupant's pelvis, forwardly covering to the forwardmost position that the occupant's torso can move after a lateral collision, backwardly covering to the maximum backward position that the occupant's torso can move when the occupant is sitting, and upwardly covering to the occupant's shoulders or chest.

[0011] In a preferred embodiment of the present invention, the angle between the upper cavity bag body and the lower cavity bag body after being unfolded is greater than 90° and less than 180°.

[0012] In a preferred embodiment of the present invention, the angle between the upper cavity bag body and the lower cavity bag body after being unfolded is 135°.

[0013] In a preferred embodiment of the present invention, the upper cavity bag body is formed by folding an upper cavity bag body piece in half and sewing it along the periphery; or, it is formed by folding two symmetrically arranged upper cavity bag body pieces and sewing them along the periphery; or, it is formed by folding an upper cavity bag body piece in half and sewing it with a top surface bag body piece along the periphery to form a three-dimensional shape of a triangular prism.

[0014] In a preferred embodiment of the present invention, an upper cavity drawstring for controlling the volume and posture of the upper cavity bag body is provided inside the upper cavity bag body.

[0015] In a preferred embodiment of the present invention, the lower cavity bag body is formed by folding a butterfly-shaped lower cavity bag body piece in half and sewing it along the periphery; or, it is formed by symmetrically arranged left and right lower cavity bag body pieces sewn along the periphery.

[0016] In a preferred embodiment of the present invention, an air inlet channel is formed on the side of the lower chamber bag body, the gas generator is a cylindrical structure, the air outlet end of the gas generator is inserted into the air inlet channel through the opening of the air inlet channel, and the gas generator is sealed and fixed in the air inlet channel of the lower chamber bag body by connecting fasteners.

[0017] In a preferred embodiment of the present invention, the connecting fasteners include a connecting bracket, a clamp and a bolt.

[0018] In a preferred embodiment of the present invention, a root drawstring for being sleeved on the gas generator and playing a role of stabilizing the air bag is provided at a position of the lower chamber bag body close to the gas generator.

[0019] In a preferred embodiment of the present invention, an oblique pull strap is provided on the side of the lower cavity bag body for allowing the lower cavity bag body to be upright and unfolded without tipping over to the passenger side.

[0020] In a preferred embodiment of the present invention, a lower cavity drawstring for controlling the volume and posture of the lower cavity bag body is provided inside the lower cavity bag body.

[0021] As a second aspect of the present invention, an airbag folding method of a dual-chamber side distal automobile safety airbag structure comprises the following steps:

[0022] Step S10, flattening and unfolding the airbag equipped with the gas generator;

[0023] Step S20, folding the upper cavity bag body along the fold line at the connecting position between the upper cavity bag body and the lower cavity bag body toward one side of the lower cavity bag body, and placing it above the lower cavity bag body;

[0024] Step S30, folding the upper chamber bag body along the upper limit of the required airbag length, and folding the lower chamber bag body, with the position controlled at the lower limit of the required length of the airbag after the final folding;

[0025] Step S40, folding the front edge of the airbag obtained by folding in step S30 twice, so that the width of the airbag after folding is the required width of the airbag after final folding;

[0026] Step S50, rolling and folding the air bag obtained by step S40 for multiple times;

[0027] Step S60, performing a Z-fold on the airbag obtained by folding in step S50, so that the overall deployment direction of the airbag is folded toward the passenger side;

[0028] In step S70, a wrapping cloth is put on the outer peripheral side of the air bag folded in step S60, and a hot press molding process is performed.

[0029] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] 1. The side distal airbag of the present invention is installed between the passengers. When the car is hit from the side, it will be inflated and deployed quickly to avoid collision between the passengers and prevent the passengers from being injured due to excessive lateral deflection.

[0031] 2. The present invention adopts a double-chamber design, and the upper and lower chambers can perform their respective functions, which can more easily follow the body shape and passenger position to protect the passenger's head, neck and torso;

[0032] 3. The several outer pull straps of the air bag of the present invention can prevent the air bag from tipping over and play a stabilizing role;

[0033] 4. The folding method of the present invention is not affected by the surrounding environment, the unfolding process is fast and stable, and the applicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a front view of the protection area of ​​the double-cavity side distal automobile safety airbag structure of the present invention.

[0036] Figure 2 It is a side view of the protection area of ​​the double-chamber side distal automobile safety airbag structure of the present invention.

[0037] Figure 3 It is a structural schematic diagram of a dual-chamber side distal automobile safety airbag structure of the present invention.

[0038] Figure 4 The invention relates to a double-cavity side distal automobile safety airbag structure.

[0039] Figure 5 It is a structural schematic diagram of an embodiment of the upper chamber bag body of the double-chamber side distal automobile safety airbag structure of the present invention.

[0040] Figure 6 It is a structural schematic diagram of another embodiment of the upper chamber bag body of the double-chamber side distal automobile safety airbag structure of the present invention.

[0041] Figure 7 It is a structural schematic diagram of an embodiment of the lower chamber bag body of the double-chamber side distal automobile safety airbag structure of the present invention.

[0042] Figure 8 It is a structural schematic diagram of another embodiment of the lower chamber bag body of the double-chamber side distal automobile safety airbag structure of the present invention.

[0043] Fig. 9 It is a schematic diagram of the drawstring structure of the double-chamber side distal automobile safety airbag structure of the present invention.

[0044] Figures 10 to 16 It is a schematic diagram of the folding of the double-chamber side distal automobile safety airbag structure of the present invention. DETAILED DESCRIPTION

[0045] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0046] See also Figures 1 to 4 , the figure shows a dual-chamber side distal automobile safety airbag structure, which is installed in the side of the main driver's seat 10, including an airbag 100 and a gas generator 200. The gas generator 200 fills the airbag 100 with gas when a side collision occurs, so that the airbag 100 is quickly deployed and placed between the main driver's seat and the co-driver's seat. Specifically, after the airbag 100 is deployed, it is located between the passenger 20 and the auxiliary instrument panel 30 (center console armrest box).

[0047] The airbag 100 includes an upper chamber bag body 110 and a lower chamber bag body 120 arranged in an upper and lower arrangement. The volume of the upper chamber bag body 110 is smaller than that of the lower chamber bag body 120, so as to maintain the stability of the double chambers and avoid the situation of being top-heavy. The coverage range of the upper chamber bag body 110 after deployment is: upwardly covering the highest point of the occupant's head, forwardly covering the most forward position where the occupant's torso can move after a side collision, and backwardly covering the position where the torso can move backward to the maximum when the occupant is sitting. The coverage range of the lower chamber bag body 120 after deployment is: downwardly covering the occupant's pelvis, forwardly covering the most forward position where the occupant's torso can move after a side collision, backwardly covering the position where the torso can move backward to the maximum when the occupant is sitting, and upwardly covering the occupant's shoulder or chest. If the vehicle body is equipped with a sub-instrument panel (central control armrest box), the lower end of the lower chamber bag body 120 can cover the position below the sub-instrument panel, so that the sub-instrument panel can provide support for the side of the lower chamber bag body 120.

[0048] The angle between the upper bag body 110 and the lower bag body 120 after deployment is greater than 90° and less than 180°. Preferably, the angle between the upper bag body 110 and the lower bag body 120 after deployment is 135°. When the airbag 100 is deployed, the upper bag body 110 has a larger coverage area to prevent collisions between the main driver and the co-driver. At the same time, the Y-direction width of the upper bag body 110 is large, which can effectively support the head of the main driver. In this way, the airbag 100 supports the head through the upper bag body 110, and the lower bag body 120 and the auxiliary instrument panel support, which can stabilize the posture of the occupant and prevent the occupant from being injured due to large-scale deflection.

[0049] The upper chamber bag body 110 is connected to the lower chamber bag body 120 and at least one air guide channel is formed at the connection. Specifically, at least one upper vent hole is opened at the connection position between the upper chamber bag body 110 and the lower chamber bag body 120, and at least one lower vent hole is opened at the connection position between the lower chamber bag body 120 and the upper chamber bag body 110. The upper chamber bag body 110 and the lower chamber bag body 120 are connected by sewing, and during sewing, each upper vent hole of the upper chamber bag body 110 is connected to each lower vent hole of the lower chamber bag body 120, and the upper vent holes and the lower vent holes are connected to form the above-mentioned air guide channel. When the airbag 100 is deployed, the gas generated by the gas generator 200 first enters the lower chamber bag body 120, causing the lower chamber bag body 120 to expand rapidly. At the same time, the gas in the lower chamber bag body 120 quickly enters the upper chamber bag body 110 through the gas guide channel, causing the upper chamber bag body 110 to expand rapidly, thereby providing all-round protection for the side of the occupant. Of course, the number of gas guide channels can be set according to the gas guide design requirements and is not limited to the number in this embodiment.

[0050] See also Figure 5 , the figure shows the shape of the cut pieces and the sewing method of an embodiment of the upper cavity bag body 110 of the present invention. The upper cavity bag body 110 is formed by folding an upper cavity bag body cut piece 110a in half and sewing it along the periphery. The sewing method is that the upper edge 111a and the lower edge 112a are sewn together to form a cavity. Of course, the upper cavity bag body cut piece 110a can also be divided into two along the middle, that is, two symmetrically arranged upper cavity bag body cut pieces 110b and 110c, and sewn along the periphery to form a similar effect. The upper vent 113a is used for the lower cavity bag body 120 to let air into the upper cavity bag body 110. The number of the upper vent 113a can be one or more. The positions of the upper vent 113a are close to the two upper cavity bag body cut pieces 110b and 110c, respectively, so that different unfolding effects can be obtained and different functions can be realized. When the upper vent 113a is centered, the upper cavity can be inclined upward at an angle of 45°. A varying number of upper cavity drawstrings 114 are provided inside the upper cavity bag body 110, which are used to control the volume and posture of the upper cavity bag body 110. The upper cavity drawstrings 114 are sewn on the inner side surfaces of two upper cavity bag body panels 110b and 110c. The upper cavity drawstrings 114 are generally in the shape of long strips and are used to control the volume and posture of the air bag.

[0051] See also Figure 6, the figure shows the shape of the pieces and the sewing method of another embodiment of the upper cavity bag body 110 of the present invention. The upper cavity bag body 110 is formed by folding an upper cavity bag body piece 110d in half and sewing it with a top surface bag body piece 110e along the periphery to form a three-dimensional shape of a triangular prism. After the upper cavity bag body piece 110d is folded in half along the middle, its upper edge 111d is sewn with the upper edge 111e of the top surface bag body piece 110e, and its lower edge 112d is sewn with the lower edge 112e of the top surface bag body piece 110e, so that the upper cavity bag body piece 110d and the top surface bag body piece 110e are sewn into a three-dimensional figure similar to a triangle. The coverage range of the upper cavity bag body 110 is to cover upward to the highest point of the occupant's head, to cover forward to the frontmost part of the occupant's trunk that can move after a lateral collision, and to cover backward to the occupant's trunk position in a normal sitting position. Due to the three-dimensional shape of the upper cavity bag body 110, more head area can be covered, solving the problem of insufficient head coverage.

[0052] See also Figure 7 , the figure shows the shape of the pieces and the sewing method of an embodiment of the lower cavity bag body 120 of the present invention. The lower cavity bag body 120 is formed by folding a butterfly-shaped lower cavity bag body piece 120a in half and sewing it along the periphery, and the sewing method is that the inner edge 121a and the outer edge 122a are sewn together to form a cavity. A butterfly-shaped lower cavity bag body piece 120a can also be divided into two along the middle, that is, symmetrically arranged left and right lower cavity bag body pieces 120b and 120c, and sewn along the periphery to form a similar effect.

[0053] The lower vent hole 123a is used for the lower cavity bag body 120 to inlet air into the upper cavity bag body 110. The lower cavity bag body 120 and the upper cavity bag body 110 are sewn together by sewing the edge of the lower vent hole 123a and the edge of the upper vent hole 113a together, and sewing reinforcement is performed around the through hole, and the sewing position is at the sewing periphery 115a of the upper cavity bag body 110 and the sewing periphery 124a of the lower cavity bag body 120.

[0054] See also Figure 7 Combined with Figure 3The U-shaped groove positions 125a and 126a of the lower chamber bag body 120 are aligned to form an air inlet channel 121. The gas generator 200 is a cylindrical structure with a single-end gas outlet. The outlet end 210 of the gas generator 200 is inserted into the air inlet channel 121 of the lower chamber bag body 120, and the gas generator 200 is sealed and fixed in the air inlet channel 121 of the lower chamber bag body 120 by connecting fasteners. The connecting fasteners include a connecting bracket 310, a clamp 320 and a bolt 330. The bolt 330 is installed on the connecting bracket 310. When the outlet end 210 of the gas generator 200 is inserted into the air inlet channel 121 of the lower chamber bag body 120, it is fastened and sealed by the clamp 320. A limited opening 127a is left on the lower chamber bag body 120, which cooperates with the middle tongue 311 or the side of the connecting bracket 310 to form a step, which can play a role in positioning the air bag and the bracket.

[0055] See also Figure 8 , the figure shows the air intake method of the gas generator 200 of another embodiment of the present invention. The inner edge 121d and the outer edge 122d of the butterfly-shaped lower cavity bag body piece 120d of the lower cavity bag body 120 are sewn together to the positioning points 123d and 124d, and the air intake channel 121 is formed between the positioning points 123d and 124d. After the gas generator 200, the connecting bracket 310 containing the bolt 330, the clamp 320, etc. are fastened together, the gas generator assembly is installed in the air intake channel 121, and the bolt 330 passes through the bolt hole 125d in the butterfly-shaped lower cavity bag body piece 120d. The upper and lower widths of the sealing sheet 120e are different, and the width of the upper section is slightly larger than the diameter of the gas generator 200, so that the gas outlet end 210 of the gas generator 200 with a single gas outlet passes through the sealing bag after the left and right seams, and the gas enters the interior of the lower chamber bag body 120, and does not leak gas from the air inlet channel 121. The sealing sheet 12e is sewn in a left and right seam, with the upper edge 121e and the edge 122e being seamed, and the lower edge 123e and the edge 124e being seamed, forming a hollow shape, with the upper end for the gas outlet end 210 of the gas generator 200 to pass through, and the lower end for the plug end 220 of the gas generator 200 to pass through. The sealing sheet 120e and the butterfly-shaped lower cavity bag body panel 120d are sewn together by sewing the lower edge 125e of the sealing sheet 120e to the portion 126d between the positioning points 123d and 124d of the butterfly-shaped lower cavity bag body panel 120d to prevent the gas that has entered the lower cavity bag body 120 from leaking therefrom.

[0056] See also Fig. 9, a root drawstring 130 is provided at a position of the lower chamber bag body 120 near the gas generator 200. The root drawstring 130 is formed by folding a long strip of cloth in half, one end 131 of which is sewn to the lower end of the lower chamber bag body 120, and the other end 132 is sleeved on the gas generator 200, which plays a role in stabilizing the airbag. An oblique drawstring 140 is provided on the side of the lower chamber bag body 120, and the function of the oblique drawstring 140 is to enable the airbag to be deployed upright without tipping over to the passenger side when it is deployed. One end of the oblique drawstring 140 is sewn to the upper position 122 of the lower chamber bag body 120, and the other end is fixed to 123 near the gas generator 200. The length of the oblique drawstring 140 is approximately 80% of the length between the upper position 122 of the lower chamber bag body 120 and 123 near the gas generator 200. The width of the oblique drawstring 140 is relatively wide, especially at the sutured part 122 of the lower cavity bag body 120. The wider drawstring can prevent the air bag from rotating along the drawstring, which would cause the air bag to be unstable. In addition, a lower cavity drawstring 124 is arranged inside the lower cavity bag body 120. The lower cavity drawstring 124 is sutured on the inner side of the lower cavity bag body 120 and is generally in the shape of a long strip, which is used to control the volume and posture of the lower cavity bag body 120.

[0057] See also Figures 10 to 16 , the figure shows an airbag folding method of a dual-chamber side distal automobile safety airbag structure, comprising the following steps:

[0058] Step S10, flatten and unfold the airbag 100 equipped with the gas generator 200, as shown in FIG. Fig.10 shown.

[0059] Step S20, fold the upper cavity bag body 110 along the fold line at the connection position between the upper cavity bag body 110 and the lower cavity bag body 120 toward one side of the lower cavity bag body 120, and place it above the lower cavity bag body 120, such as Fig.11 shown.

[0060] Step S30, the upper chamber bag body 110 is folded along the upper limit of the required airbag length, and the lower chamber bag body 120 is folded inside, and the position is controlled to be at the lower limit of the required length of the airbag after the final folding, such as Fig.12 shown.

[0061] Step S40, folding the front edge of the air bag 100 obtained by folding in step S30 twice, so that the width of the air bag after folding is the required width of the air bag after the final folding, such as Fig.13 shown.

[0062] Among them, the role of step S20 to step S40 is to balance the upper and lower deployment speeds when the airbag is deployed. Since the air intake of the gas generator 200 is at the lower chamber bag body 120, the lower chamber bag body 120 is opened first when the airbag 100 is deployed. In order to prevent the upper part of the lower chamber bag body 120 from being deployed faster than the lower part, and the deployment is uneven, resulting in excessive impact on surrounding parts such as the cover and seat foam, the upper chamber bag body 110 is rolled and the lower chamber bag body 120 is folded inwardly, and when deployed, the upper chamber bag body 110 faces the main driver's side, which is conducive to the upper chamber bag body 110 to be quickly in place and prevent it from drifting toward the co-pilot during deployment, causing instability.

[0063] Step S50, the air bag 100 folded in step S40 is rolled up multiple times. Fig.14 shown.

[0064] Step S60, the airbag 100 folded in step S50 is Z-folded once, so that the overall deployment direction of the airbag is folded toward the passenger side, as shown in FIG. Fig.15 shown.

[0065] Among them, the role of step S50 and step S60 is to deploy the airbag towards the passenger side, which can reduce the impact on the occupant, causing the airbag to become unstable and fall after hitting the occupant. The main method of rolling and folding can ensure a smooth deployment process, controllable speed and stable direction.

[0066] Step S70, wrapping the outer peripheral side of the air bag 100 folded in step S60 with a wrapping cloth, and performing a hot pressing molding process, such as Fig.16 shown.

[0067] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dual-chamber side distal automobile safety airbag structure, which is installed in the side of the main driver's seat, includes an airbag and a gas generator, wherein the gas generator fills the airbag with gas when a side collision occurs, so that the airbag is rapidly deployed and placed between the main driver's seat and the co-driver's seat; characterized in that: The air bag comprises an upper cavity bag body and a lower cavity bag body which are arranged up and down. The upper cavity bag body and the lower cavity bag body are connected and at least one air guide channel is formed at the connection.

2. The dual-chamber side distal automobile airbag structure according to claim 1, characterized in that: The volume of the upper cavity bag body is smaller than that of the lower cavity bag body.

3. The dual-chamber distal side automobile airbag structure as claimed in claim 1, characterized in that: At least one upper ventilation hole is opened at the connecting position of the upper cavity bag body and the lower cavity bag body, and at least one lower ventilation hole is opened at the connecting position of the lower cavity bag body and the upper cavity bag body. The upper cavity bag body and the lower cavity bag body are connected by sewing, and during sewing, each upper ventilation hole of the upper cavity bag body is connected with each lower ventilation hole of the lower cavity bag body, and the upper ventilation holes are connected with the lower ventilation holes to form the air guiding channel.

4. The dual-chamber distal side automobile airbag structure according to claim 1, characterized in that: The coverage range of the upper chamber bag body after unfolding is: upward coverage to the highest point of the occupant's head, forward coverage to the forwardmost position that the occupant's torso can move after a lateral collision, and backward coverage to the maximum backward movement of the occupant's torso when the occupant is sitting; the coverage range of the lower chamber bag body after unfolding is: downward coverage to the occupant's pelvis, forward coverage to the forwardmost position that the occupant's torso can move after a lateral collision, backward coverage to the maximum backward movement of the occupant's torso when the occupant is sitting, and upward coverage to the occupant's shoulders or chest.

5. The dual-chamber distal side automobile airbag structure as claimed in claim 4, characterized in that: The included angle between the upper cavity bag body and the lower cavity bag body after unfolding is greater than 90° and less than 180°.

6. The dual-chamber distal side automobile airbag structure as claimed in claim 5, characterized in that: The included angle between the upper cavity bag body and the lower cavity bag body after unfolding is 135°.

7. The dual-chamber distal side automobile airbag structure as claimed in claim 1, characterized in that: The upper cavity bag body is formed by folding an upper cavity bag body piece in half and sewing it along the periphery; or, by sewing two symmetrically arranged upper cavity bag body pieces along the periphery; or, by folding an upper cavity bag body piece in half and sewing it with a top surface bag body piece along the periphery to form a three-dimensional shape of a triangular prism.

8. The dual-chamber distal side automobile airbag structure as claimed in claim 7, characterized in that: An upper cavity drawstring for controlling the volume and posture of the upper cavity bag body is arranged inside the upper cavity bag body.

9. The dual-chamber distal side automobile airbag structure as claimed in claim 1, characterized in that: The lower cavity bag body is formed by folding a butterfly-shaped lower cavity bag body piece in half and sewing it along the periphery; or, it is formed by symmetrically arranged left and right lower cavity bag body pieces sewing it along the periphery.

10. The dual-chamber distal side automobile airbag structure according to claim 1, characterized in that: An air inlet channel is formed on the side of the lower chamber bag body. The gas generator is a cylindrical structure, and its air outlet end is inserted into the air inlet channel through the opening of the air inlet channel. The gas generator is sealed and fixed in the air inlet channel of the lower chamber bag body by connecting fasteners.

11. The dual-chamber distal side automobile airbag structure according to claim 10, characterized in that: The connecting fasteners include a connecting bracket, a clamp and a bolt.

12. The dual-chamber distal side automobile airbag structure according to claim 10, characterized in that: The lower chamber bag body is provided with a root drawstring at a position close to the gas generator and used for being sleeved on the gas generator and playing a role in stabilizing the air bag.

13. The dual-chamber distal side automobile airbag structure according to claim 10, characterized in that: An oblique pull strap is arranged on the side of the lower cavity bag body so as to enable the lower cavity bag body to be upright and unfolded without tipping over to the passenger side.

14. The dual-chamber distal side automobile airbag structure as claimed in claim 9, characterized in that: A lower cavity drawstring for controlling the volume and posture of the lower cavity bag body is arranged inside the lower cavity bag body.

15. An airbag folding method for a dual-chamber side distal automobile safety airbag structure according to any one of claims 1 to 14, characterized in that: The following steps are involved: Step S10, flattening and unfolding the airbag equipped with the gas generator; Step S20, folding the upper cavity bag body along the fold line at the connecting position between the upper cavity bag body and the lower cavity bag body toward one side of the lower cavity bag body, and placing it above the lower cavity bag body; Step S30, folding the upper chamber bag body along the upper limit of the required airbag length, and folding the lower chamber bag body, with the position controlled at the lower limit of the required length of the airbag after the final folding; Step S40, folding the front edge of the airbag obtained by folding in step S30 twice, so that the width of the airbag after folding is the required width of the airbag after final folding; Step S50, rolling and folding the air bag obtained by step S40 for multiple times; Step S60, performing a Z-fold on the airbag obtained by folding in step S50, so that the overall deployment direction of the airbag is folded toward the passenger side; In step S70, a wrapping cloth is put on the outer peripheral side of the air bag folded in step S60, and a hot press molding process is performed.

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