Safety air bag with active deflation function

Abstract

The utility model relates to the technical field of automobile safety air bags, in particular to a safety air bag with an active deflation function. The safety air bag comprises a shell, a supporting ring, an air bag body, an exhaust barrel, a pull rope and an excitation device, and one end of the exhaust barrel is arranged on an exhaust hole of the air bag body in a sealed mode; two ends of the pull rope are connected to the other end of the exhaust cylinder; a fixed support is arranged on the shell, and the excitation device is embedded in the fixed support; the supporting ring is fixedly connected with the shell, a releasing device is arranged at the position, opposite to the excitation device, of the supporting ring, the middle of the pull rope is hung on the releasing device, and when the excitation device is exploded, the releasing device is split so that the pull rope can be released. Compared with the prior art, the safety device has the advantages that the pull rope is hung through the arranged release device, and the risk that in the prior art, after an excitation device is exploded, screws fly out to injure passengers is avoided.

Description

Airbags with active deflation function Technical Field

[0001] This utility model relates to the field of automotive airbag technology, and in particular to an airbag with active deflation function. Background Technology

[0002] Car airbags are a type of passive safety restraint system in automobiles. They deploy instantly in the event of a collision to protect the safety of the occupants. The airbags require very high gas pressure to deploy, resulting in a significant impact. While they offer some protection for occupants of normal weight and in a normal sitting posture, they can easily cause injury to lighter individuals or those with poor posture.

[0003] To address this issue, existing patent CN113335221A describes a novel adaptive airbag exhaust port structure and automotive airbag. This design uses a pull strap to control the opening and closing of the exhaust cylinder to regulate the pressure inside the airbag, thus preventing injury to passengers with smaller builds or improper posture during airbag deployment. The design involves a separating plate fixedly mounted on the activation housing, with the other end of the pull strap fixed to the separating plate using screws or rivets. The separating plate has a weak groove to facilitate the pull strap's detachment upon detonation. However, when the pull strap is connected to the separating plate with screws, there is a risk that the screws may fly out and injure the occupant after the activation device detonates. Summary of the Invention

[0004] To address the above problems, this utility model provides an airbag with active deflation function.

[0005] This utility model provides an airbag with active deflation function, including a shell, a support ring, an air bag, an exhaust pipe, a pull rope, and an activation device. One end of the exhaust pipe is sealed on the exhaust port of the air bag; both ends of the pull rope are connected to the other end of the exhaust pipe; a fixed support is provided on the shell, and the activation device is embedded in the fixed support; the support ring is fixedly connected to the shell, and a release device is provided on the support ring at a position opposite to the activation device; the middle of the pull rope is hung on the release device, and when the activation device is detonated, the release device splits to release the pull rope.

[0006] Compared with the prior art, the beneficial effect of this utility model is that the pull rope is hung by the set release device, which avoids the risk of screws flying out and causing injury to the occupants after the trigger device is detonated, which is present in the prior art.

[0007] Preferably, the housing is provided with a first opening, and the fixing support is provided at the first opening and located on the outer bottom surface of the housing. The fixing support has a cavity communicating with the housing, and the shape of the cavity is adapted to the shape of the excitation device housing.

[0008] Preferably, a raised platform is provided inside the cavity of the fixed support, and a notch structure adapted to the raised platform is provided on the housing of the excitation device. A retaining strip is also vertically provided inside the cavity of the fixed support, and a retaining groove adapted to the retaining strip is provided on the housing of the excitation device.

[0009] Preferably, the first opening of the housing is provided with an outwardly extending bent structure, which contacts the housing of the excitation device to serve as a grounding function.

[0010] Preferably, the support ring is provided with a second opening, the shape of which is adapted to the release device. A support ring protrusion is provided inside the support ring at the second opening. The support ring protrusion has an open bottom structure and is connected to the second opening. An elongated hole is provided on the support ring protrusion for the pull rope to pass through. After the pull rope passes through the elongated hole, it is hung on the release device, and the release device is embedded in the support ring protrusion.

[0011] Preferably, the release device includes a main body with an open lower end, and the main body has vertically oppositely spaced gradient slots. The pull rope is hung on the release device through the gradient slots on both sides, and a tearing groove is provided on the inner side of the top of the main body.

[0012] Preferably, positioning posts are provided on both sides of the upper part of the main body, and a gradient positioning groove adapted to the positioning posts is provided inside the support ring protrusion. During the process of the release device being embedded into the support ring protrusion, the positioning is achieved by the positioning posts and the gradient positioning groove structure. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 is a top view of the assembly of the shell and the fixed support in an embodiment of this utility model;

[0015] Figure 2 is a front view structural diagram of the assembly of the shell and the fixed support in an embodiment of this utility model;

[0016] Figure 3 is a schematic diagram of the split structure of the shell and the fixed support in an embodiment of this utility model;

[0017] Figure 4 is a top view of the structure of the support ring and the support ring convex package in an embodiment of the present invention;

[0018] Figure 5 is a schematic diagram of the support ring in an embodiment of this utility model;

[0019] Figure 6 is a schematic diagram of the support ring in an embodiment of this utility model.

[0020] Figure 7 is a schematic diagram of the structure of the support ring protrusion in an embodiment of this utility model;

[0021] Figure 8 is a cross-sectional view of the support ring protrusion in an embodiment of this utility model;

[0022] Figure 9 is a front view structural diagram of the release device in an embodiment of this utility model;

[0023] Figure 10 is a perspective structural diagram of the release device in an embodiment of this utility model;

[0024] Figure 11 is a schematic diagram of the excitation device in an embodiment of this utility model;

[0025] Figure 12 is a schematic diagram of the excitation device in an embodiment of this utility model.

[0026] Figure 13 is a cross-sectional view of the overall assembly in an embodiment of this utility model;

[0027] Figure 14 is a schematic diagram of the state of the pull rope before release in an embodiment of this utility model;

[0028] Figure 15 is a schematic diagram of the state after the pull rope is released in an embodiment of this utility model;

[0029] Figure 16 is a schematic diagram of the state of the release device after the rope is released in an embodiment of this utility model;

[0030] Figure 17 is a schematic diagram of the connection between the pull rope and the exhaust pipe in an embodiment of this utility model.

[0031] The components include: 1. Shell; 2. Support ring; 3. Air bag; 4. Exhaust pipe; 5. Pull rope; 6. Activation device; 7. Fixed support; 8. Release device; 9. Raised platform; 10. Notch structure; 11. Locking strip; 12. Locking groove; 13. Bending structure; 14. First opening; 15. Second opening; 16. Support ring protrusion; 17. Long hole; 18. Notch flange; 19. Main body; 20. Gradient slot; 21. Positioning post; 22. Gradient positioning groove. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.

[0033] Referring to Figures 1-17, an embodiment of this utility model provides a safety airbag with active deflation function, including a shell 1, a support ring 2, an air bag 3, an exhaust pipe 4, a pull rope 5, and an activation device 6. One end of the exhaust pipe 4 is sealed on the exhaust port of the air bag 3; both ends of the pull rope 5 are connected to the other end of the exhaust pipe 4; a fixed support 7 is provided on the shell 1, and the activation device 6 is embedded in the fixed support 7; the support ring 2 is fixedly connected to the shell 1, and a release device 8 is provided on the support ring 2 at a position opposite to the activation device 6; the middle part of the pull rope 5 is hung on the release device 8; when the activation device 6 is detonated, the release device 8 splits, thereby releasing the pull rope 5.

[0034] During implementation, when the pull cord 5 is not released and the airbag 3 is deployed, the upper and lower sections of the exhaust pipe 4 are tightly fitted together to form a closed space due to the internal pressure of the airbag 3 and the pulling effect of the pull cord 5. When the pull cord 5 is released and the airbag 3 is deployed, the upper and lower sections of the exhaust pipe 4 separate to form an air passage, releasing the gas and releasing the pressure. The pressure inside the airbag 3 can be adjusted by controlling the opening or closing of the exhaust pipe 4 through the pull cord 5, so as to avoid injury to passengers with smaller weight or incorrect sitting posture during the deployment of the airbag 3.

[0035] The exhaust pipe 4 has a structure consisting of a lower cylinder and an upper cone. The opening of the cylinder is connected to the exhaust port of the air bag 3, and the opening of the cone is connected to the pull rope 5. Specifically, the exhaust pipe 4 can be made of rectangular and fan-shaped fabric pieces sewn together. The rectangular fabric pieces form the cylinder, and the fan-shaped fabric pieces form the cone. The rectangular and fan-shaped fabric pieces can be a single piece or two pieces sewn together. After the two ends of the cone of the exhaust pipe 4 are connected to the two ends of the pull rope 5, at least one air outlet is formed in the middle.

[0036] The ignition device 6 is a small gas generator, which includes an ignition device housing, an igniter, a sealing ring, a short-circuit clamp, etc. The ignition device housing forms an igniter mounting chamber. An opening communicating with the igniter mounting chamber is opened on one end face of the ignition device housing. The release device 8 is opposite to the opening. The igniter is installed in the ignition device housing and connected to the vehicle's electronic control unit. When the igniter receives an ignition signal sent by the vehicle's electronic control unit, the igniter is ignited, causing high-temperature and high-pressure gas to form in the ignition device housing. The release device 8 is impacted and broken under the action of the high-temperature and high-pressure gas, thereby causing the pull rope to loosen.

[0037] In practice, the housing 1 is provided with a first opening 14, and the fixed support 7 is provided at the first opening 14 and located on the outer bottom surface of the housing 1. The fixed support 7 has a cavity communicating with the housing 1, and the shape of the cavity is adapted to the shape of the excitation device housing. The housing 1 and the fixed support 7 can adopt a split structure (as shown in Figure 3). The split structure can be installed using bolts, nuts, welding, stamping, or other structures. Alternatively, an integrated structure can be adopted (as shown in Figures 1 and 2), which can be achieved by injection molding or plastic coating.

[0038] A raised platform 9 is provided inside the cavity of the fixed support 7, and a notch structure 10 adapted to the raised platform 9 is provided on the excitation device housing. A retaining strip 11 is also vertically provided inside the cavity of the fixed support 7, and a retaining groove 12 adapted to the retaining strip 11 is provided on the excitation device housing; thereby fixing the position of the excitation device 6.

[0039] A bending structure 13 extending outward is provided at the first opening 14 of the housing 1. The bending structure 13 contacts the housing of the excitation device and serves as a grounding function.

[0040] The support ring 2 is provided with a second opening 15, the shape of which is adapted to the release device 8. A support ring protrusion 16 is provided inside the support ring 2 at the second opening 15. The support ring protrusion 16 has an open bottom structure and communicates with the second opening 15. An elongated hole 17 is provided on the support ring protrusion 16 for the pull rope 5 to pass through. After the pull rope 5 passes through the elongated hole 17, it is hung on the release device 8. The release device 8 is embedded in the support ring protrusion 16. The support ring 2 and the support ring protrusion 16 can be adopted as separate structures. The two can be connected by bolts, nuts, welding, stamping and other structures. Alternatively, they can be adopted as one-piece structures. Specifically, they can be coated with plastic without material (as shown in Figure 5) or coated with material (as shown in Figure 6). Coated with material means that a notch and flange 18 is provided at the second opening 15 for integrally coated with the support ring protrusion 16.

[0041] The release device 8 includes a main body 19 with an open lower end. The main body 19 has vertically oppositely spaced gradient slots 20. The pull rope 5 is hung on the release device 8 through the gradient slots 20 on both sides. The inner side of the top of the main body 19 is provided with a tearing groove. The main body 19 can extend towards the excitation device 16 and cover the excitation device housing to enhance the connection stability.

[0042] Positioning posts 21 are provided on both sides of the upper part of the main body 19. Gradient positioning grooves 22 adapted to the positioning posts 21 are provided inside the support ring protrusion 16. During the process of the release device 8 being embedded into the support ring protrusion 16, the positioning is achieved by the locking and positioning structure of the positioning posts 21 and the gradient positioning grooves 22. The shape of the release device 8, the shape and number of the positioning posts 21, and the shape and number of the gradient positioning grooves 22 can be adjusted according to actual needs.

[0043] The overall installation sequence of this utility model is as follows: First, put the support ring 2 into the air bag 3. After the pull rope 5 passes through the hole on the support ring 2 and the air bag 3, it protrudes out of the air bag 3. Hang the protruding pull rope 5 on the release device 8. Then, snap the release device 8 into the support ring protrusion 16 to fix the support ring 2 to the housing 1. During the connection process, the release device 8 is installed on the excitation device housing. Finally, fold the air bag 3 and put it into the housing 1.

[0044] In this utility model's technical solution, both the release device and the fixed support can be injection molded parts, which can reduce the module weight and lower product costs. The release device, fixed support, support ring, and activation device are all assembled together, increasing assembly stability. Furthermore, the activation device is located inside the airbag shell, greatly increasing the safety and stability of the airbag during deployment. While ensuring that passengers with smaller weight or improper sitting posture are less likely to be injured in car accidents, the design also optimizes aspects such as the difficulty of sewing the airbag, assembly stability, deployment stability, and module cost.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. An airbag with active deflation function, comprising a shell, a support ring, an air bag, an exhaust pipe, a pull cord, and an activation device, wherein one end of the exhaust pipe is sealed onto the exhaust port of the air bag; characterized in that, The two ends of the pull rope are connected to the other end of the exhaust pipe; a fixed support is provided on the shell, and the ignition device is embedded in the fixed support; the support ring is fixedly connected to the shell, and a release device is provided on the support ring at a position opposite to the ignition device. The middle of the pull rope is hung on the release device. When the ignition device is detonated, the release device splits, thereby releasing the pull rope.

2. The airbag with active deflation function as described in claim 1, characterized in that, The housing has a first opening, and the fixed support is located at the first opening and on the outer bottom surface of the housing. The fixed support has a cavity that communicates with the housing, and the shape of the cavity is adapted to the shape of the excitation device housing.

3. The airbag with active deflation function as described in claim 2, characterized in that, The cavity of the fixed support is provided with a raised platform, and the housing of the excitation device is provided with a notch structure that matches the raised platform. The cavity of the fixed support is also provided with a vertical locking strip, and the housing of the excitation device is provided with a locking groove that matches the locking strip.

4. The airbag with active deflation function as described in claim 2, characterized in that, An outwardly extending bent structure is provided at the first opening of the shell, and the bent structure contacts the shell of the excitation device to serve as a grounding function.

5. The airbag with active deflation function as described in claim 1, characterized in that, The support ring is provided with a second opening, the shape of which is adapted to the release device. Inside the support ring, at the second opening, there is a support ring protrusion. The support ring protrusion has an open bottom structure and is connected to the second opening. The support ring protrusion has an elongated hole for the pull rope to pass through. After the pull rope passes through the elongated hole, it is hung on the release device, and the release device is embedded in the support ring protrusion.

6. The airbag with active deflation function as described in claim 5, characterized in that, The release device includes a main body with an open lower end. The main body has vertically opposite gradually changing slots. The pull rope is hung on the release device through the gradually changing slots on both sides. The inner side of the top of the main body is provided with a tearing groove.

7. The airbag with active deflation function as described in claim 6, characterized in that, Positioning posts are provided on both sides of the upper part of the main body, and a gradient positioning groove adapted to the positioning posts is provided inside the support ring protrusion. During the process of the release device being embedded into the support ring protrusion, the positioning post and the gradient positioning groove structure achieve snap-fit ​​positioning.

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