Recyclable automobile built-in safety air bag system

Abstract

The invention discloses a recyclable built-in safety air bag system of an automobile. The recyclable built-in safety air bag system comprises a control unit, a high-pressure air pump, an air storage tank and an air bag module. One end of the air storage tank is connected with the high-pressure air pump, the other end of the air storage tank is connected with the air bag module, a one-way valve is arranged between the high-pressure air pump and the air storage tank, and an inflation valve is arranged between the air storage tank and the air bag module. After a trigger signal is detected, the control unit activates the inflation valve, high-pressure gas in the gas storage tank is injected into the gas bag module through the gas guide pipe, and the gas bag module is completely unfolded. The air bag module comprises a negative pressure pump, a recovery motor and an air bag, after collision is finished, air in the air bag is exhausted through the negative pressure pump, then the air bag is driven by the recovery motor, and the air bag is folded and recovered to the original position. Through a high-pressure gas driving and recycling mechanism, the problems that a traditional air bag is polluted and cannot be repeatedly used are solved, and meanwhile the safety performance is improved.

Description

Technical Field

[0001] The present invention relates to automotive safety technology, and particularly to a recyclable built-in airbag system for vehicles. Background Art

[0002] Traditional automotive airbag systems generally use chemical gas generators (such as guanidine nitrate) as the core for gas generation, and release gas instantaneously through an explosion reaction triggered by a collision, causing the airbag to deploy to protect the occupants. Although this technology has significantly improved vehicle safety performance in the past few decades, its inherent defects have gradually emerged, specifically manifested in the following aspects: 1. After the traditional airbag deploys, due to the irreversible reaction of the chemical gas generator, the entire airbag module needs to be replaced, and the discarded airbag components contain chemical residues and are difficult to degrade.

[0003] 2. The chemical gas generator generates high temperature and harmful by-products during the explosion reaction, which may corrode the airbag fabric or be released into the passenger compartment, threatening the health of the occupants. It is also possible to ignite flammable materials in the vehicle, increasing the risk of secondary accidents.

[0004] 3. The starting speed of the chemical reaction is significantly affected by factors such as environmental temperature and humidity. At low temperatures, the decomposition efficiency of guanidine nitrate decreases, which may cause the airbag deployment to be delayed and unable to meet the protection requirements in high-speed collision scenarios.

[0005] In recent years, some studies have attempted to alleviate the above problems by improving the gas generator formula or optimizing the sensor algorithm, but have still not broken through the fundamental limitations of the chemical drive mode. Chinese patent applications for invention such as publication number CN103129507A propose a front airbag device for vehicles. In this patent, sodium azide is used instead of guanidine nitrate to reduce toxicity, but the airbag still cannot be reused. Chinese patent applications for invention such as publication CN109204206A propose that high-pressure gas after being pressurized by a booster pump in a gas storage cylinder enters and opens the airbag, but recycling the airbag is relatively troublesome.

[0006] In view of this, there is a need for further improvement in the existing technology. Summary of the Invention

[0007] In order to solve the defects existing in the above-mentioned prior art, the present invention proposes a recyclable built-in airbag system for vehicles, The technical solution of the present invention is implemented as follows: A recyclable built-in airbag system for vehicles, characterized in that it includes a control unit, a high-pressure air pump, a gas storage cylinder, and an airbag module, One end of the gas storage cylinder is connected to the high-pressure air pump, and the other end is connected to the airbag module. Among them, a one-way valve is provided between the high-pressure air pump and the gas storage cylinder, and an inflation valve is provided between the gas storage cylinder and the airbag module. After detecting the trigger signal, the control unit activates the inflation valve, and the high-pressure gas in the gas tank is injected into the airbag module through the air guide pipe, so that the airbag module is fully deployed. The airbag module includes a negative pressure pump, a recovery motor and an airbag bag. After the collision, the gas in the airbag bag is discharged by the negative pressure pump, and then the recovery motor drives the airbag bag to be folded and recovered to its original position.

[0008] In the present invention, the airbag module also includes a storage port, and the airbag bag is folded and recovered at the storage port. The recovery motor is composed of a screw motor and a driving screw. The screw motor drives the airbag bag to be folded and recovered according to its creases by the driving screw.

[0009] In the present invention, a flexible nylon rope is also provided inside the airbag bag, and the nylon rope is used to drive the airbag bag to be recovered into the storage opening.

[0010] The present invention further includes a central gas storage tank, which is connected to a central distributor, and the central distributor is connected to one or more air bag modules, and each air bag module is connected to the same number of gas storage tanks. The central distributor is used to balance the pressure among multiple gas storage tanks.

[0011] In the present invention, a pressure sensing device is provided in the central distributor to control the start and stop of the high-pressure air pump.

[0012] In the present invention, the airbag bag expands rapidly according to a preset fold, and the internal guide belt limits excessive expansion, so that it forms a bowl-shaped or butterfly-shaped structure.

[0013] In the present invention, the airbag bag can be inflated in two stages, with 70% inflation in the first stage and another 30% inflation in the second stage.

[0014] In the present invention, within 1-2 seconds after the airbag bag is fully expanded, the negative pressure pump discharges the gas in the airbag bag and collapses it into a flat state.

[0015] In the present invention, the airbag bag is mainly formed by sewing two pieces of textile fabrics, the upper and lower pieces, and the fabric is made of high-strength materials such as nylon fiber or polyester fiber.

[0016] The recyclable automobile built-in safety airbag system of the present invention has the following beneficial effects: The present invention solves the pollution and non-reusability problems of traditional airbags through high-pressure gas driving and recovery mechanism, while improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the pop-up state structure of the built-in safety airbag system of the automobile of the present invention; Figure 2 Schematic diagram of the recycling state structure of the in-vehicle airbag system of the present invention; Figure 3 Simple block diagram of the structure of the airbag module of the present invention; Figure 4 Structural analysis diagram of the airbag of the present invention; Figure 5 Another structural analysis diagram of the airbag of the present invention; In the figure: control unit 10, high-pressure air pump 20, gas storage tank 30, one-way valve 31, inflation valve 32, airbag module 40, negative pressure pump 41, recycling motor 42, screw motor 421, drive screw 422, airbag 43, storage opening 44. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Automobile airbag systems generally use explosive reactions to instantaneously release gas to deploy the airbag to protect the occupants, and this method cannot be recycled. In the prior art, for example, as disclosed in CN109204206A, the high-pressure gas after being pressurized by a booster pump in a gas storage cylinder enters and opens the airbag, but recycling the airbag is rather troublesome.

[0020] Embodiment 1 Referring to Figures 1 to 2 As shown, this recyclable in-vehicle airbag system of this embodiment includes a control unit 10, a high-pressure air pump 20, a gas storage tank 30, and an airbag module 40. The gas storage tank 30 stores high-pressure inert gas with a pressure range of 4-6 Mpa. And the gas storage tank 30 is internally provided with a pressure relief valve and a pressure sensor to prevent explosion and leakage. One end of the gas storage tank 30 is connected to the high-pressure air pump 20, and the other end is connected to the airbag module 40. Among them, a one-way valve 31 is provided between the high-pressure air pump 20 and the gas storage tank 30, and an inflation valve 32 is provided between the gas storage tank 30 and the airbag module 40, and the inflation valve 32 is controlled electromagnetically with a response time < 5 ms.

[0021] In this embodiment, the control unit 10 includes an acceleration sensor, a pressure sensor, and a camera for predicting collisions. The amount of gas released is graded according to the collision intensity to avoid excessive impact. Among them, after multiple sensors detect a trigger signal, the inflation valve 32 is quickly activated through the control unit 10, and the high-pressure gas in the gas storage tank 30 is injected into the airbag module 40 through a conduit, so that the airbag module 40 is fully deployed within 20-50 ms.

[0022] Preferably, the inside of the gas storage tank is CO2, nitrogen, or compressed air, In this embodiment, the airbag module 40 includes a negative pressure pump 41, a recovery motor 42, and an airbag 43. After a collision ends, all the gas in the airbag 43 is exhausted by the negative pressure pump 41. Then, driven by the recovery motor 42, the airbag 43 is folded and recovered to its original position.

[0023] Preferably, the airbag 43 is made of a high-strength elastic composite material, such as polyamide fiber + silicone coating, and supports multiple pop-up cycles.

[0024] Preferably, after a collision accident is resolved, it is necessary to check whether the airbag is damaged. If it is damaged, the airbag 43 can be replaced separately and then the recovery button is activated; if it is not damaged, the airbag 43 can be directly retracted into the mechanical cavity device by the recovery motor 42.

[0025] Preferably, the airbag modules 40 are distributed in one or more parts inside the vehicle. Among them, the gas storage tank 30 is provided with a central distributor to identify the working pressure of each sub-airbag module 40 and automatically replenish air in real time.

[0026] Preferably, when the vehicle is started, the pressure of the gas storage tank 30 is automatically detected. When it is insufficient, the high-pressure air pump 20 automatically inflates. If the high-pressure air pump 20 frequently starts to replenish air, professional personnel need to check whether there is a leakage at the connection part.

[0027] In this embodiment, high-pressure compressed gas is used, which has no chemical pollution, and the airbag and the gas tank can be recycled. The damaged airbag can be disassembled and replaced separately, reducing the maintenance cost. The release speed of the high-pressure gas is better than that of traditional chemical reactions, eliminating unstable chemical factors and the pressure is controllable.

[0028] In this embodiment, refer to Figure 3 As shown, after a collision accident is resolved, check whether the airbag 43 is damaged. If it is damaged, the airbag 43 can be quickly and manually replaced separately and then recovered. Among them, the airbag module 40 further includes a storage opening 44. After the airbag 43 is recovered, the airbag 43 is folded and recovered in the storage opening 44.

[0029] Furthermore, the recovery motor 42 is composed of a screw motor 421 and a driving screw 422. The screw motor 421 can drive the airbag 43 to be folded and recovered along its creases through the driving screw 422.

[0030] Embodiment Two Based on the above embodiment, this embodiment further discloses how the airbag 43 is folded and deployed. When the airbag 43 is not deployed, in order to save space, it is compactly stored in the steering wheel or the instrument panel. Generally, it is folded in a combined Z-shape and curled shape, first folded in regional blocks, and then compressed as a whole.

[0031] It all starts at the moment when the vehicle encounters a collision. When the vehicle collides at a speed exceeding 20 km / h, the acceleration sensors and pressure sensors distributed in the front, side, and B-pillar of the vehicle body will immediately capture the intense deceleration signal. The front main sensor, usually located behind the bumper or in the engine compartment, is responsible for monitoring the impact force of a frontal collision; the side collision sensors integrated in the door or B-pillar can identify side impacts or intrusion of columnar objects; the raw data collected by the sensors (such as deceleration G value, collision angle) will be transmitted to the control unit 10 within 1-2 milliseconds, and the airbag 43 will be fully inflated within 30 milliseconds through a one-way valve 31 provided between the air storage tank 30.

[0032] Preferably, the airbag 43 expands rapidly according to the preset creases, and the internal guide belt restricts excessive expansion, enabling it to form a bowl-shaped or butterfly-shaped structure to precisely cover the occupant's head and chest.

[0033] Preferably, the airbag 43 can be inflated in two stages according to the occupant's weight and position. For example, it is first inflated by 70% and then supplemented by 30% to reduce the harm to children or out-of-position occupants; Preferably, within 1-2 seconds after the airbag 43 is fully inflated, the negative pressure pump 41 completely discharges the gas in the airbag 43, causing it to collapse into a flat state.

[0034] Preferably, the airbag 43 is mainly sewn from two upper and lower pieces of textile fabric. The fabric is generally made of high-strength materials such as nylon fiber or polyester fiber.

[0035] Embodiment Three Since the airbag is not randomly stuffed into the steering wheel or dashboard, but is compactly packaged through industrial-grade precision folding technology, in order to improve the recycling efficiency. On the basis of one or more of the above embodiments, this embodiment is further disclosed.

[0036] Refer to Figure 4 As shown, a flexible nylon rope 423 is provided inside the airbag 43. One end of the nylon rope 423 is connected to the driving screw 422. When recycling is required, the gas in the airbag 43 is discharged through the negative pressure pump 41, and then the driving screw 422 drives the nylon rope 423 to pull one end of the airbag 43 to rotate, enabling it to be spirally recycled into the receiving port 44.

[0037] Further, refer to Figure 5 As shown, in this embodiment, a central air storage tank is installed at the bottom of the vehicle. The central air storage tank is connected to the central distributor. Among them, the central distributor is respectively connected to multiple airbags.

[0038] Specifically, the multiple airbag bags can be divided into a driver's seat airbag, a passenger seat airbag, a knee airbag, a seat cushion airbag, a left front side airbag, a right front side airbag, a curtain airbag, and rear side air curtains on both sides. The driver's seat airbag is located in front of the driver's seat and is installed in the center of the steering wheel; the passenger seat airbag is located in front of the co-pilot seat; the knee airbag is installed under the instrument panel to provide protection for the knees of the driver and passengers. The seat cushion airbag is located inside the seat cushion to provide additional buffer protection; the left and right front side airbags are respectively installed on the outside of the driver's and passenger's seats to provide protection against side collisions; the curtain airbag is installed above the window to cover the risk of side collisions; the rear side air curtains on both sides ensure the safety of rear passengers. Among them, the multiple airbag bags are respectively installed with independent distribution gas storage tanks, and the central distributor is used to balance the pressure between the multiple distribution gas storage tanks.

[0039] Furthermore, a pressure sensing device is provided inside the central distributor to control the start and stop of the high-pressure air pump.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A recyclable automobile built-in airbag system, characterized in that: Including control unit, high pressure air pump, air tank and air bag module, One end of the gas storage tank is connected to the high-pressure air pump, and the other end is connected to the airbag module, wherein a one-way valve is provided between the high-pressure air pump and the gas storage tank, and an inflation valve is provided between the gas storage tank and the airbag module. After detecting the trigger signal, the control unit activates the inflation valve, and the high-pressure gas in the gas tank is injected into the airbag module through the air guide pipe, so that the airbag module is fully deployed. The airbag module includes a negative pressure pump, a recovery motor and an airbag bag. After the collision, the gas in the airbag bag is discharged by the negative pressure pump, and then the recovery motor drives the airbag bag to be folded and recovered to its original position.

2. The recyclable automobile built-in safety airbag system according to claim 1, characterized in that: The airbag module also includes a storage port, and the airbag bag is folded and recovered at the storage port. The recovery motor is composed of a screw motor and a driving screw. The screw motor drives the airbag bag to be folded and recovered according to its creases by the driving screw.

3. The recyclable automobile built-in safety airbag system according to claim 2, characterized in that: The airbag bag is also provided with a flexible nylon rope inside, and the nylon rope is used for driving the airbag bag to be recovered into the storage opening.

4. The recyclable automobile built-in safety airbag system according to claim 1, characterized in that: It also includes a central gas storage tank, which is connected to a central distributor, and the central distributor is connected to one or more air bag modules, and each air bag module is connected to the same number of gas storage tanks. The central distributor is used to balance the pressure among multiple gas storage tanks.

5. The recyclable automobile built-in safety airbag system according to claim 1, characterized in that: The central distributor is provided with a pressure sensing device to control the start and stop of the high-pressure air pump.

6. The recyclable automobile built-in safety airbag system according to claim 1, characterized in that: The airbag bag expands rapidly according to a preset fold, and an internal guide belt limits excessive expansion, so that it forms a bowl-shaped or butterfly-shaped structure.

7. The recyclable automobile built-in safety airbag system according to claim 1, characterized in that: The airbag bag can be inflated in two stages, with 70% inflation in the first stage and another 30% inflation in the second stage.

8. The recyclable automobile built-in safety airbag system according to claim 7, characterized in that: Within 1-2 seconds after the airbag bag is fully expanded, the negative pressure pump discharges the gas in the airbag bag and collapses it into a flat state.

9. The recyclable automobile built-in safety airbag system according to claim 1, characterized in that: The airbag bag is mainly formed by sewing two pieces of textile fabrics, the first piece of fabric is made of high-strength materials such as nylon fiber or polyester fiber.

Images