Vehicle rear protection air bag device

Abstract

The utility model relates to the technical field of vehicle passive safety, in particular to a vehicle rear protection air bag device which comprises an inflation part, a guide part, an air bag part and a drawstring part, the inflation part comprises a gas generator, an installation guide part and a gas guide part, and the guide part comprises a guide hole part, a guide installation supporting foot and a guide containing guide part. The air bag part is formed by sewing or bonding more than two sheets, and the drawstring part comprises a braid part and a lock catch part. The rear air bag is arranged on the seat or the vehicle body, the arrangement space is abundant, the head space is not occupied, the optimization design of the vehicle appearance is better facilitated, the supporting and guiding structure and the drawstring are arranged, the air bag is more stable and reliable to unfold, the arrangement is not limited by the position relation among the seat, the ceiling and the rear window, and after the air bag is unfolded, the air bag is more comfortable. The air bag can be guided into the space of the side face, the top and the middle of the seat, effective contact between the air bag and the head of a passenger is increased, and a more comprehensive protection effect is provided.

Description

Technical Field

[0001] This utility model relates to the field of vehicle passive safety technology, and in particular to a vehicle rear protective airbag device. Background Technology

[0002] In the current field of vehicle passive safety, the safety of front and side collisions is the main focus. Therefore, among passive safety companies, airbag-related companies focus on the development of airbags for frontal and side collisions in accordance with national and industry standards. Rear collision safety mainly relies on child safety seats, and relatively little attention is paid to rear-seat occupants.

[0003] In response to the above situation, existing patents have proposed solutions: For example, invention patent 200410011890.2 discloses an airbag that unfolds along the rear window glass of a vehicle and has a guide pulling device; invention patent 03132700.1 discloses a passenger protection device that, after inflation, can at least partially cover the side wall (side window) and the rear wall (rear window); invention patent 200710301830.8 discloses a rear collision airbag device including an inflator and an airbag with an irregular cross-sectional shape housed in a receiving portion formed in the vehicle roof; invention patent 202110265927.8 discloses a vehicle rear window collision airbag having an air guiding structure that can limit the flow direction of gas entering the airbag and having an elastic deformable support portion that absorbs vibration and avoids collision noise; utility model patent 201420155168.5 discloses a vehicle rear window safety airbag that is fixedly connected to the rear window crossbeam of the rear window of the car at the top and slidably connected to two guide rails on both sides.

[0004] These patents have made beneficial attempts in this regard, providing a certain degree of protection for rear passengers. However, the solutions provided by these invention patents or utility model patents are similar to installing existing side curtain airbags in the rear window roof position, mainly applicable to MPV models with relatively ample headroom. The above patents all have the following limitations, some or all of which are as follows: First, the airbag placement position is very unfriendly to sedans where rear headroom is already very limited; second, because the rear space is much larger than the side space, the airbag lacks effective support in the initial stage of deployment and will drift away from the occupants, greatly reducing the protective effect; third, the inflated airbag is flat, and due to the influence of the seat headrest, the airbag and the occupant's head cannot make effective contact during the entire collision process, especially in the middle of the rear seat, causing the airbag to lose its due protective effect; fourth, in autonomous driving mode, the occupants with the front seats facing backwards have not yet received corresponding protection.

[0005] In view of this, we propose a rear-side airbag device for vehicles to solve the existing problems. Utility Model Content

[0006] The purpose of this invention is to provide a rear airbag device for vehicles to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rear airbag device for vehicles, applied to seats and vehicle bodies, the rear airbag including an inflation part, a guide part, an airbag part, and a strap part; the inflation part including a gas generator, an installation guide part, and an air guide part; the guide part including a guide hole part, a guide mounting foot, and a guide receiving guide part; the airbag part being formed by sewing or bonding two or more sheets; the strap part including a webbing part and a buckle part.

[0008] Furthermore, the installation guide connects the gas generator, air guide, and airbag together and fixes them to the seat back or vehicle body, with the air guide installed between the gas generator and the airbag.

[0009] Furthermore, after the airbag is folded, it is placed inside the guide housing, and the provided cable ties pass through the guide hole to bind the guide housing and the airbag together.

[0010] Furthermore, the airbag portion includes sheet A and sheet B, which have different lengths. The longer sheet A has a Z-shaped fold at the part of the airbag portion that needs to bulge, and after the Z-shaped folding, sheet A has the same length as sheet B.

[0011] Furthermore, one end of the webbing is connected to the airbag portion, and the other end is connected to the buckle portion; the buckle portion is fixed to the seat or vehicle body.

[0012] Furthermore, the mounting guide includes a mounting guide hole, a mounting guide receiving guide, and a mounting guide mounting leg.

[0013] Furthermore, the gas generator is a cylindrical generator or a disc-shaped generator; the air guide section has two or more openings and mounting and fixing sections; the number of guide holes is two or more; the shape of the guide holes is square or circular; the number of guide mounting feet is two or more; the guide mounting feet pass through the hanging ears of the airbag section and are fixedly installed to the seat back or vehicle body; the guide receiving guide section is U-shaped; the locking section has at least two holes and one hook section; the holes of the locking section are square or circular.

[0014] Furthermore, the number of the mounting guide holes is two or more; the shape of the mounting guide holes is square or round; the number of the mounting guide mounting feet is two or more; the mounting guide mounting feet pass through the hanging ears of the airbag and are fixedly installed to the back of the seat or the vehicle body.

[0015] Furthermore, the air inlet is provided at the junction of the airbag part and the inflation part, and the number of inlet is one; the hanging ear is provided at the junction of the airbag part and the inflation part, and the number of hanging ear is two or more.

[0016] Furthermore, the junction of the airbag portion and the guide portion is provided with two or more hanging ears.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The rear airbag of this utility model is arranged in the seat or body, with ample space, does not occupy head space, and is more conducive to the optimization of vehicle shape design.

[0019] 2. This utility model has its own supporting and guiding structure and pull strap, which makes the airbag deployment more stable and reliable, and the arrangement is not limited by the positional relationship between the seat, the roof, and the rear window.

[0020] 3. After the airbag of this utility model is deployed, it can be guided into the space of the side, top and middle of the seat, increasing the effective contact between the airbag and the occupant's head and providing a more comprehensive protection effect.

[0021] 4. The airbag of this utility model is suitable for the protection of occupants with the front seats facing backwards in autonomous driving mode. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram showing the deployment effect of the rear airbag of this utility model inside the cockpit.

[0023] Figure 2 This is a side view of the deployment effect of the rear airbag of this utility model inside the cockpit.

[0024] Figure 3 This is a schematic diagram of the rear airbag of this utility model in the uninstalled state;

[0025] Figure 4 This is a schematic diagram illustrating the arrangement of the rear airbag within the seat according to this utility model.

[0026] Figure 5 This is a schematic diagram of the stacked cross-section of the airbag portion of this utility model;

[0027] Figure 6 This is a schematic cross-sectional view of the inflatable part of the rear airbag of this utility model;

[0028] Figure 7 This is a schematic cross-sectional view of the guide section of the rear airbag of this utility model;

[0029] Figure 8 This is a schematic diagram of the rear airbag of this utility model arranged in the opposite direction in the front seat.

[0030] In the diagram: 1. Rear airbag; 2. Seat; 3. Body; 4. Front seat; 5. Front and rear airbags; 11. Inflator; 12. Guide; 13. Airbag; 14. Strap; 111. Gas generator; 112. Mounting guide; 113. Air guide; 1121. Mounting guide hole; 1122. Mounting guide receiving guide; 1123. Mounting guide mounting leg; 121. Guide hole; 122. Guide mounting leg; 123. Guide receiving guide; 124. Cable tie; 131. Sheet A; 132. Z-fold; 133. Sheet B; 134. Sewing thread; 141. Webbing; 142. Buckle. Detailed Implementation

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. Example 1

[0032] Figure 1 The diagram shows the deployed state of the rear airbag 1 within the vehicle cabin. The two ends of the rear airbag 1 enter the gap between the seat 2 and the door panel, forming side wings to protect the occupant's sides. The rear airbag 1 bulges out at the Z-shaped fold 132 in the middle, entering the gap in the middle headrest of the seat 2, effectively protecting the head of the occupant in the middle seat. The upper end of the rear airbag 1 enters the gap between the seat 2 and the roof, providing effective protection above the occupant's head, especially in the event of vehicle rollover. It is evident that the rear airbag 1 of this invention provides more comprehensive protection compared to existing technologies.

[0033] Figure 2 The rear airbag 1 is shown to deploy and enter the gap between the headrest and the roof of seat 2 under the guidance of the rear windshield or roof.

[0034] Figure 3The rear airbag 1 is shown to be folded into a long strip. The rear airbag 1 includes an inflation part 11, a guide part 12, an airbag part 13, and a pull strap part 14. The inflation part 11 includes a gas generator 111, a mounting guide part 112, and a gas guide part 113. The guide part 12 includes a guide hole part 121, a guide mounting foot 122, and a guide receiving guide part 123. The airbag part 13 is made of two or more pieces of sheet material sewn or glued together. The pull strap part 14 includes a webbing part 141 and a buckle part 142. The mounting guide part 112 includes a mounting guide hole part 1121, a mounting guide receiving guide part 1122, and a mounting guide mounting foot 1123. The gas generator 111 is a cylindrical or disc-shaped generator. The air guide section 113 has two or more openings and mounting parts. The number of guide holes 121 is two or more, and the shape of the guide holes 121 is square or round. The number of guide mounting feet 122 is two or more, and the guide mounting feet 122 pass through the lugs of the airbag section 13 and are fixedly installed to the backrest of the seat 2 or the body 3. The guide receiving guide section 123 is U-shaped. The locking section 142 has at least two holes and one hook, and the holes of the locking section 142 are square or round. One end of the webbing section 141 is connected to the airbag section 13, and the other end is connected to the locking section 142; the locking section 142 is fixed to the seat 2 or the body 3. There are two or more mounting guide holes 1121, the shape of which is square or round, and there are two or more mounting guide mounting feet 1123. The mounting guide mounting feet 1123 pass through the hanging ears of the airbag part 13 and are fixedly installed on the back of the seat 2 or the body 3.

[0035] Figure 4 The diagram illustrates the arrangement of the rear airbag 1 within the vehicle cabin. The rear airbag 1 is positioned at the rear or side of two or more side-by-side vehicle seats 2, or at the rear or side of the vehicle body 3 adjacent to the seats 2. The portions of the airbag 1 extending beyond the width of the seats 2 or the vehicle body 3 are bent at a certain angle and positioned downwards or upwards on the sides of the seats 2 or the vehicle body 3. The number and position of the inflatable parts 11 and the guide parts 12 can be combined as needed. If there are three seats 2, two preferred solutions are possible. Preferred Solution 1: One inflatable part 11 is positioned at the middle seat 2; two guide parts 12 are positioned at the two side seats 2. Preferred Solution 2: Two inflatable parts 11 are positioned at the two side seats 2; one guide part 12 is positioned at the middle seat 2.

[0036] Figure 5The diagram shows the longitudinal section of the airbag portion 13 and a specific implementation method of the Z-shaped fold 132. The sewing thread 134 is only one preferred embodiment, and an adhesive implementation method can also be adopted. The airbag portion 13 includes sheet A131 and sheet B133, which have different lengths. The longer sheet A131 has a Z-shaped fold 132 at the part of the airbag portion 13 that needs to be bulged. After the sheet A131 is processed by the Z-shaped fold 132, it is equal in length to the sheet B133.

[0037] Figure 6 The diagram shows a cross-section of the inflatable section 11 along the extension direction of the airbag section 13. The mounting guide section 112 is made of metal using sheet metal processing or of plastic using injection molding. The mounting guide section 112 connects the gas generator 111, the air guide section 113, and the airbag section 13 together, and is ultimately installed and fixed to the seat back 2 or the vehicle body 3. The air guide section 113 is made of metal using sheet metal processing or of woven fabric or film material through cutting, sewing, or bonding. Installed between the gas generator 111 and the airbag section 13, the air guide section 113 isolates high-temperature gas, preventing it from burning the airbag, and directs airflow to both sides of the airbag section 13. One air inlet is provided at the junction of the airbag section 13 and the inflatable section 11; two or more hanging ears are provided at the junction of the airbag section 13 and the inflatable section 11.

[0038] Figure 7 The cross-section of guide section 12 is shown. Guide section 12 is made of metal using sheet metal processing or of plastic using injection molding. Airbag section 13 is folded and placed inside guide section 123. Cable ties 124 pass through guide hole section 121 to bind guide section 12 and airbag section 13 together. Two or more hanging ears are provided at the junction of airbag section 13 and guide section 12.

[0039] Figure 8 This shows the deployment state of the front rear airbags 5 when the front seat 4 is placed face-down. In vehicles with autonomous driving capabilities, the front seat 4 of the intelligent cockpit can be adjusted to a face-down position according to the needs of the usage scenario. In this case, the traditional driver and passenger airbags will lose their protective effect. The arrangement and protective effect of the front rear airbags 5 are the same as those of the rear airbag 1, and will not be described again.

[0040] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A rear protection air bag device for a vehicle, applied to a seat (2) and a vehicle body (3), a rear air bag (1) comprising an inflator (11), a guide portion (12), an air bag portion (13), and a harness portion (14), characterized in that: The inflatable part (11) comprises a gas generator (111), a mounting guide part (112), and a gas guide part (113); the guide part (12) comprises a guide hole part (121), a guide mounting leg (122), and a guide containing guide part (123); the airbag part (13) is sewn or bonded by two or more sheets; the drawstring part (14) comprises a webbing part (141) and a lock part (142).

2. The vehicle rear protection airbag device according to claim 1, characterized by: The mounting guide part (112) connects the gas generator (111), the gas guide part (113), and the airbag part (13) together and is fixed to the seat backrest (2) or the vehicle body (3).

3. The vehicle rear protection airbag device according to claim 1, characterized by: The airbag part (13) is folded and placed inside the guide containing guide part (123), and the provided strap (124) passes through the guide hole part (121) to bind the guide part (12) and the airbag part (13) together.

4. The vehicle rear protection airbag device according to claim 1, characterized by: The airbag part (13) comprises a sheet A (131) and a sheet B (133), the lengths of the sheet A (131) and the sheet B (133) are different, the longer sheet A (131) is provided with a Z-shaped fold (132) at the part of the airbag part (13) that needs to be inflated, and the sheet A (131) is equal in length to the sheet B (133) after being processed by the Z-shaped fold (132).

5. The vehicle rear protection airbag device according to claim 1, characterized by: The webbing part (141) is connected to the airbag part (13) at one end and to the lock part (142) at the other end; the lock part (142) is fixed to the seat (2) or the vehicle body (3).

6. The vehicle rear protection airbag device according to claim 1, characterized by: The mounting guide part (112) comprises a mounting guide hole part (1121), a mounting guide containing guide part (1122), and a mounting guide mounting leg (1123).

7. The vehicle rear protection airbag device according to claim 1, characterized by: The gas generator (111) is a cylindrical generator or a pie-shaped generator; the gas guide part (113) has two or more opening parts and mounting fixing parts; the number of guide hole parts (121) is two or more; the shape of the guide hole part (121) is square or circular; the number of guide mounting legs (122) is two or more; the guide mounting leg (122) is fixed to the seat backrest (2) or the vehicle body (3) through the ear part of the airbag part (13); the guide containing guide part (123) is U-shaped; the lock part (142) has at least two hole parts and a hook part; the hole part of the lock part (142) is square or circular.

8. The vehicle rear protection airbag device according to claim 6, characterized by: The number of mounting guide hole parts (1121) is two or more; the shape of the mounting guide hole part (1121) is square or circular; the number of mounting guide mounting legs (1123) is two or more; the mounting guide mounting leg (1123) is fixed to the seat backrest (2) or the vehicle body (3) through the ear part of the airbag part (13).

9. The vehicle rear protection airbag device according to claim 1, characterized by: The air bag part (13) and the inflation part (11) are provided with an air inlet at the joint, and the number is one; the air bag part (13) and the inflation part (11) are provided with a hanging ear part at the joint, and the number is more than two; the air bag part (13) and the guide part (12) are provided with a hanging ear part at the joint, and the number is more than two.

10. The vehicle rear protection airbag device according to claim 1, characterized by: The installation guide part (112) is made of metal material through sheet metal process, or made of plastic material through injection molding process; the air guide part (113) is made of metal material through sheet metal process, or made of woven cloth or film material by cutting, sewing or bonding; the guide part (12) is made of metal material through sheet metal process, or made of plastic material through injection molding process.

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