Safety air bag and safety air bag mounting structure

Abstract

The utility model relates to a supplementary restraint system and a supplementary restraint system installation structure, the supplementary restraint system comprises a supplementary restraint system body, the supplementary restraint system body is provided with an air inlet, at least one first exhaust hole and at least one second exhaust hole, and the second exhaust hole is provided with an air escape valve; the air release valve comprises a contraction sleeve and a pull rope, the contraction sleeve is arranged around the second exhaust hole, and the contraction sleeve is fixedly connected with the airbag body; the contraction sleeve is provided with an annular inner cavity, the first end of the pull rope is connected with the middle section of the pull rope to form a rope sleeve, the rope sleeve is arranged in the annular inner cavity, the second end of the pull rope is arranged outside the annular inner cavity and connected with the air bag body, and the first end and the second end are opposite in direction. When the air bag body is exploded, the pull rope can pull the contraction sleeve to contract so as to close the second exhaust hole. When articles are stacked on the area, corresponding to the safety air bag, of the automobile instrument desk, impact force generated when the safety air bag is exploded can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of airbag technology, and in particular to an airbag and an airbag installation structure. Background Technology

[0002] One of the common installation areas for airbags is the dashboard cover in a car, which usually has a warning sign indicating that occupants should not place items in the airbag installation area. However, some people still ignore these warnings and place items on the dashboard cover. When a collision occurs, the impact force of the airbag (deployment means the gas generator rapidly releases gas to expand the airbag) will cause the items on the dashboard to move forward rapidly due to inertia, resulting in serious injury to the occupants. Utility Model Content

[0003] The purpose of this utility model is to provide a safety airbag and a safety airbag installation structure, which can reduce the impact force generated when the airbag is deployed when items are piled up on the area of ​​the car dashboard corresponding to the airbag installation.

[0004] To achieve the above objectives, this utility model discloses an airbag, comprising an airbag body, an air inlet, at least one first exhaust port, and at least one second exhaust port, the second exhaust port being provided with a deflation valve; the deflation valve includes a retractable sleeve and a pull cord, the retractable sleeve being arranged around the second exhaust port and fixedly connected to the airbag body; the retractable sleeve having an annular inner cavity, the first end of the pull cord being connected to the middle section of the pull cord to form a rope sleeve, the rope sleeve being placed in the annular inner cavity, the second end of the pull cord being placed outside the annular inner cavity, and the second end of the pull cord being connected to the airbag body, the first end and the second end being in opposite directions; when the airbag body is detonated, the pull cord can pull the retractable sleeve to retract, thereby closing the second exhaust port.

[0005] With the above settings, when the airbag body is deployed, the pull cord can be tightened, causing the retractable sleeve to contract and close the second vent. This is the normal deployment state of the airbag body. The gas generated during deployment is discharged through the first vent, which corresponds to the original vent of a traditional airbag. However, if the pull cord is not tightened (for example, by partially compressing the pull cord and the airbag body, preventing the airbag body from fully deploying, the pull cord will not be tightened), the gas generated during deployment can still be discharged through the second vent, thereby reducing the impact force of the airbag deployment.

[0006] Preferably, the airbag body includes a main piece and two side pieces, the main piece being connected end to end to form a tubular structure, and the two ends of the tubular structure being connected to the side pieces to form the airbag body; the second exhaust hole is disposed on the side piece, and the second end of the pull cord is connected to the main piece. This arrangement facilitates tightening the pull cord when the airbag body is fully deployed.

[0007] Preferably, the shrink sleeve is made of fabric. This arrangement ensures that the shrink sleeve can be easily stretched and contracted, and also facilitates its connection to the airbag body, such as by sewing or heat fusion.

[0008] Preferably, the fabric pieces are connected end to end to form a loop, and the loop is folded over and its edges are connected to form the shrink sleeve; the outer side of the shrink sleeve has a through hole for the pull cord to enter and exit. This design of the shrink sleeve is simple in structure, and the through hole is not at the connection node of the fabric pieces, making it less prone to tearing.

[0009] Preferably, reinforcing plates are connected to the outer edges of both the first and second vent holes, and the vent valve is connected to the reinforcing plate corresponding to the second vent hole. The reinforcing plates ensure the strength of the first and second vent holes.

[0010] This utility model also discloses an airbag installation structure, which includes the aforementioned airbag, gas generator, pressure sensing element, and clamping element. The airbag body is disposed below the upper cover of the dashboard, and the pull cord is partially folded together with the airbag body. The gas generator is disposed at the air inlet of the airbag body, and the pressure sensing element is disposed below the upper cover of the dashboard to detect the pressure of the upper cover of the dashboard. The clamping element cooperates with the dashboard to clamp the folded area of ​​the airbag body and the pull cord, or the clamping element can clamp the folded area of ​​the airbag body and the pull cord independently. The pressure sensing element and the clamping element are both connected to the gas generator, and the gas generator controls the operation of the clamping element. By sensing the pressure on the dashboard cover using a pressure sensing element, it can determine whether there are any objects placed above the airbag installation location. This allows the clamping element to clamp the airbag body and the folded area of ​​the pull cord before the gas generator ignites the airbag body. As a result, the airbag body cannot fully deploy at the moment of ignition, and the effective length of the pull cord will be greater than the length when the pull cord is taut. Gas can be discharged from the first exhaust port and the second exhaust port simultaneously, thereby reducing the impact force when the airbag body ignites and mitigating the injury caused to the occupants by objects placed on the dashboard.

[0011] Preferably, the first vent is located outside the folded area of ​​the airbag body and the pull cord, while the second vent is located close to the folded area of ​​the airbag body and the pull cord. This arrangement ensures that the first vent can release air normally. The second vent's proximity to the folded area of ​​the airbag body and the pull cord reduces the likelihood of the pull cord being pulled tight due to partial expansion of the airbag body when the folded area of ​​the airbag body and the pull cord is compressed, thus ensuring that the second vent can reliably open when needed.

[0012] Preferably, the clamping element is a linear cylinder, which cooperates with the dashboard to clamp the folded area of ​​the airbag body and the pull cord; or, the clamping element is a clamping cylinder, which clamps the folded area of ​​the airbag body and the pull cord. This configuration is simple and easy to operate.

[0013] Preferably, the clamping element is fixedly connected to the instrument panel. This arrangement prevents the clamping element from being blown away when the airbag body is deployed.

[0014] This utility model has the following beneficial effects:

[0015] When there are no objects on the dashboard where the airbag is installed and the airbag is deployed, pulling the cord will cause the retraction sleeve to contract and close the second vent. In this case, the gas produced by the deployment will only be discharged through the first vent, which corresponds to the original vent of a conventional airbag. However, when there are objects on the dashboard where the airbag is installed and the airbag is deployed, the cord and the airbag body are partially compressed, preventing the airbag from fully deploying. In this case, the cord will not be tightened, and the second vent will remain open. The gas produced by the deployment will be discharged through both the first and second vents simultaneously, thus reducing the impact force of the airbag deployment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the airbag body of this utility model (the deflation valve is not shown).

[0017] Figure 2 This is a schematic diagram of the airbag body of this utility model from another perspective (the deflation valve is not shown).

[0018] Figure 3 This is a cross-sectional view of the airbag body of this utility model in its deployed state.

[0019] Figure 4 This is a cross-sectional view of the airbag body of this utility model in its deployed state from another perspective.

[0020] Figure 5 This is a cross-sectional view of the main body of the airbag of this utility model in a folded state.

[0021] Figure 6 This is a simplified view of the present invention.

[0022] Figure 7 This is a schematic diagram of the vent valve of this utility model.

[0023] Figure 8 for Figure 7 A sectional view along line A.

[0024] Explanation of symbols for main components:

[0025] Main plate 11, side plate 12, air inlet 13, first exhaust port 14, second exhaust port 15, shrink sleeve 16, perforation 17, pull rope 18;

[0026] Clamping element 20;

[0027] Pressure sensing element 30;

[0028] Instrument panel 40, upper cover 41. Detailed Implementation

[0029] 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 accompanying drawings and embodiments.

[0030] like Figure 1-8 As shown, this utility model discloses an airbag installation structure, which includes an airbag, a gas generator, a pressure sensing element 30, and a clamping element 20.

[0031] The airbag includes an airbag body, which comprises a main sheet 11 and two side sheets 12. The main sheet 11 is joined end-to-end to form a tubular structure, and the two ends of the tubular structure are respectively connected (stitched) to one side sheet 12 to form the airbag body. The airbag body has an air inlet 13, at least one first exhaust port 14, and at least one second exhaust port 15. In this case, each side sheet 12 has one first exhaust port 14 and one second exhaust port 15. Reinforcing plates are attached to the outer edges of both the first and second exhaust ports 14 and 15 to prevent excessive exhaust pressure from causing the first and second exhaust ports 14 and 15 to rupture. The air inlet 13 is located on the main sheet 11, and the gas generator is located at the air inlet 13 of the airbag body.

[0032] A vent valve is connected to the reinforcing piece corresponding to the second vent 15. This vent valve is made of two fabric pieces, one of which is joined end-to-end to form a ring. This ring is folded over and its edges are connected to form a contraction sleeve 16, which has an annular inner cavity. A perforation 17 is provided on the outer side of the contraction sleeve 16, communicating with the annular inner cavity. The contraction sleeve 16 surrounds the second vent 15 and is fixedly connected to the airbag body (reinforcing piece). The other fabric piece serves as a pull cord 18. The first end of the pull cord 18 is connected to its middle section to form a cord sleeve, which is placed within the annular inner cavity. Specifically, the first end of the pull cord 18 extends into the annular inner cavity through the perforation 17, wraps around once, and then extends out through the perforation 17 before connecting to the middle section of the pull cord 18. The second end of the pull cord 18 is located outside the annular inner cavity and is connected to the main piece 11 of the airbag body, with the first and second ends facing opposite directions. This type of deflation valve has a simple structure and is easy to connect to the airbag body, such as through sewing or heat fusion. Preferably, the fabric used to make the deflation valve is made of the same material as the airbag body.

[0033] The airbag body is located below the upper cover plate 41 of the dashboard 40. The airbag body is folded and can be folded and sewn together. Specifically, the pull cord 18 is partially folded together with the airbag body. In this case, it is required that after the airbag body is deployed, if the partially folded portion of the pull cord 18 and the airbag body remains folded, the pull cord 18 will not be tightened. In the folded state, the first vent 14 is located outside (preferably far from) the folded area of ​​the airbag body and the pull cord 18, and the second vent 15 is located close to the folded area of ​​the airbag body and the pull cord 18. Fixedly connected to the dashboard 40, the clamping element 20 cooperates with the dashboard 40 to clamp the folded area of ​​the airbag body and the pull cord 18. For example, the clamping element 20 can be a linear cylinder. As an alternative, the clamping element 20 can be a clamping cylinder, which can clamp the folded area of ​​the airbag body and the pull cord 18 independently. The clamping element 20 is connected to a gas generator, which controls the operation of the clamping element 20.

[0034] A pressure sensing element 30 is located below the upper cover plate 41 of the instrument panel 40 to detect the pressure of the upper cover plate 41. The pressure sensing element 30 can be a pressure sensor and is connected to a gas generator. By detecting the pressure of the upper cover plate 41 of the instrument panel 40, it is determined whether there are any objects placed on the upper cover plate 41 above the airbag.

[0035] The control principle of this utility model is as follows:

[0036] First, the pressure sensor 30 continuously monitors the pressure on the upper cover 41 of the dashboard 40 and sends the feedback to the gas generator. The gas generator then determines whether the pressure value fed back by the pressure sensor 30 exceeds a set value. If it does, it indicates that an object has been placed on the upper cover 41 of the dashboard 40 above the airbag. In this case, the gas generator controls the clamping element 20 to activate and clamp the folded area between the airbag body and the pull cord 18. Otherwise, the clamping element 20 remains inactive. Then, the gas generator receives a command to deploy the airbag body. The reason for continuously monitoring the pressure on the upper cover 41 of the dashboard 40 and determining whether the pressure value fed back by the pressure sensor 30 exceeds the set value is to ensure that when an object is placed on the upper cover 41 of the dashboard 40 above the airbag, the folded area between the airbag body and the pull cord 18 is reliably clamped before deployment, ensuring that the deflation valve functions properly. If the folded area between the airbag body and the pull cord 18 is clamped when the airbag body is deployed, a set time is waited before the clamping element 20 is controlled to release the folded area between the airbag body and the pull cord 18. This allows the airbag body to fully deploy, and the impact force during deployment can be phased. If the folded area between the airbag body and the pull cord 18 is not clamped when the airbag body is deployed, and the clamping element 20 does not activate, the clamping element 20 remains in its original state.

[0037] The key to this invention lies in the following: When no items are placed on the dashboard 40 where the airbag is installed and the airbag body is deployed, the deployed airbag body can tighten the pull cord 18, causing the retraction sleeve 16 to contract and close the second exhaust port 15. At this time, the gas generated by the deployment is only discharged through the first exhaust port 14, which corresponds to the original exhaust port of a conventional airbag. However, when items are placed on the dashboard 40 where the airbag is installed and the airbag body is deployed, the pull cord 18 and the airbag body are partially compressed, preventing the airbag body from fully deploying. In this case, the pull cord 18 is not tightened, and the second exhaust port 15 remains open. The gas generated by the deployment is discharged from both the first and second exhaust ports 14, thereby reducing the impact force of the airbag deployment.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An airbag, characterized in that: The airbag includes an airbag body, which has an air inlet, at least one first exhaust port, and at least one second exhaust port. The second exhaust port has a deflation valve. The deflation valve includes a retractable sleeve and a pull cord. The retractable sleeve surrounds the second exhaust port and is fixedly connected to the airbag body. The retractable sleeve has an annular inner cavity. A first end of the pull cord is connected to a middle section to form a rope sleeve, which is placed within the annular inner cavity. A second end of the pull cord is outside the annular inner cavity and is connected to the airbag body. The first and second ends are in opposite directions. When the airbag body is detonated, the pull cord pulls the retractable sleeve to retract, thereby closing the second exhaust port.

2. The airbag according to claim 1, characterized in that: The airbag body includes a main piece and two side pieces. The main piece is connected end to end to form a tubular structure. The two ends of the tubular structure are respectively connected to the side pieces to form the airbag body. The second exhaust hole is provided on the side pieces. The second end of the pull rope is connected to the main piece.

3. The airbag according to claim 1, characterized in that: The shrink sleeve is made of cloth.

4. The airbag according to claim 3, characterized in that: The fabric pieces are connected end to end to form a ring, and the ring is folded over and the edges are connected to form the shrink sleeve; the outer side of the shrink sleeve has a through hole for the pull rope to enter and exit.

5. The airbag according to claim 1, characterized in that: The outer edges of both the first and second exhaust holes are connected to reinforcing plates, and the vent valve is connected to the reinforcing plate corresponding to the second exhaust hole.

6. An airbag mounting structure, characterized in that: The device includes the airbag, gas generator, pressure sensing element, and clamping element as described in any one of claims 1-5. The airbag body is disposed below the upper cover of the dashboard, and the pull cord is partially folded together with the airbag body. The gas generator is disposed at the air inlet of the airbag body, and the pressure sensing element is disposed below the upper cover of the dashboard to detect the pressure of the upper cover of the dashboard. The clamping element cooperates with the dashboard to clamp the folded area of ​​the airbag body and the pull cord, or the clamping element can clamp the folded area of ​​the airbag body and the pull cord independently. The pressure sensing element and the clamping element are both connected to the gas generator, and the gas generator controls the operation of the clamping element.

7. The airbag mounting structure according to claim 6, characterized in that: The first vent is located outside the folded area of ​​the airbag body and the pull cord, and the second vent is located close to the folded area of ​​the airbag body and the pull cord.

8. The airbag mounting structure according to claim 6, characterized in that: The clamping element is a linear cylinder, which cooperates with the instrument panel to clamp the folded area of ​​the airbag body and the pull cord; or, the clamping element is a clamping cylinder, which clamps the folded area of ​​the airbag body and the pull cord.

9. The airbag mounting structure according to claim 6, characterized in that: The clamping element is fixedly connected to the instrument panel.

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