WO2017202280A1 - 安全气囊 - Google Patents

安全气囊 Download PDF

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Publication number
WO2017202280A1
WO2017202280A1 PCT/CN2017/085427 CN2017085427W WO2017202280A1 WO 2017202280 A1 WO2017202280 A1 WO 2017202280A1 CN 2017085427 W CN2017085427 W CN 2017085427W WO 2017202280 A1 WO2017202280 A1 WO 2017202280A1
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WO
WIPO (PCT)
Prior art keywords
airbag
air
gas
blades
backflow prevention
Prior art date
Application number
PCT/CN2017/085427
Other languages
English (en)
French (fr)
Inventor
袁明
庄晓
Original Assignee
延锋百利得（上海）汽车安全系统有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 延锋百利得（上海）汽车安全系统有限公司 filed Critical 延锋百利得（上海）汽车安全系统有限公司
Priority to US16/077,739 priority Critical patent/US10974683B2/en
Priority to DE112017000630.9T priority patent/DE112017000630B4/de
Publication of WO2017202280A1 publication Critical patent/WO2017202280A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/213—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle roof frames or pillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/232—Curtain-type airbags deploying mainly in a vertical direction from their top edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2342—Tear seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/239—Inflatable members characterised by their venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
    • B60R2021/0032—Position of passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
    • B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
    • B60R2021/0048—Head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R2021/23153—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for rear seat passengers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23382—Internal tether means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26094—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow characterised by fluid flow controlling valves

Definitions

  • the invention relates to the technical field of automobile parts, and in particular to an airbag.
  • Airbags are used to provide effective collision protection for occupants in the event of a collision.
  • an airbag device that protects the occupant's head in a side collision employs a side air curtain that protects multiple rows of occupants at the same time.
  • the traditional side air curtain is mounted on the side wall sheet metal, generally extending from the front pillar of the car to the rear pillar. It is located above the interior of the pillar and is hidden by the edge of the ceiling and is not visible from the interior of the car.
  • the ECU Electronic Control Unit
  • the side air curtain is quickly inflated, the air bag pushes open the ceiling, spreads out over the interior, covers the side window area, and is located Between the side of the seat and the interior of the car, a protective pad is formed between the occupant's head and the body and the external hard structure to protect the occupant's head.
  • the conventional side air curtain can form a front side side protection airbag chamber and a rear side side protection airbag chamber, and the protection range is from the front pillar to the side area of the rear pillar.
  • the airbag devices that protect the front passenger's head are typically the driver's airbag and the co-pilot airbag.
  • the seat belts are generally used for protection.
  • the head and neck of the back row are often lacking. The airbag protection lost more points, resulting in a decline in the safety rating of the vehicle.
  • the small offset collision form accounted for 25% of all frontal collision accidents and 15% of all traffic accidents in traffic accidents. Therefore, all high-end models have started testing for small offset collisions of vehicles.
  • the typical body energy absorbing structure, such as the bumper the front longitudinal beam can not play a real role, which puts higher requirements on the safety of the car, especially the protection performance of the airbag.
  • IIHS Insurance Institute for Highway Safety
  • IIHS introduced a 25% positive offset collision for evaluation.
  • the driver's head can easily slide between the driver's side airbag and the side air curtain.
  • the protection of the airbag without this airbag will easily make the driver's head and hard.
  • the direct contact of the A-pillar plastic plate causes excessive damage, so the frontal protection of the front passenger is poor.
  • the conventional automobile airbag system cannot provide frontal collision protection for the occupant. Therefore, the conventional automobile airbag system has a technical problem that the occupant cannot provide full collision protection.
  • An airbag includes: an air bag having a side air curtain and a front air bag; an air bag for introducing a gas generated by the gas generator into the air bag; and a backflow prevention component, a backflow prevention component connected to the air bag, and a backflow prevention component It is possible to prevent the gas in the frontal airbag from flowing back to the side air curtain when the front airbag is squeezed.
  • the above airbag integrates a frontal airbag on the side air curtain to provide frontal protection for the occupant, protect the occupant's head and neck when the vehicle collides, reduce the occupant's head and neck injury value, and provide a full collision for the occupant. protection.
  • the airbag is provided with a backflow prevention component inside the air outlet corresponding to the front airbag.
  • the backflow prevention component can form a closed structure to close the airflow passage, thereby achieving gas stoppage.
  • the effect is to prevent the gas in the front airbag from flowing back to the side air curtain, so as to ensure that the front airbag is kept rigid when being squeezed, and the occupant's head is better protected.
  • the above-mentioned airbag integrates the front protection airbag on the side air curtain, and has a better economicality and a wider application prospect than adding a rear front protection airbag to the rear passengers behind the front seat.
  • the air guiding bag comprises an air guiding bag body and a gas guiding member, and the air guiding bag body is connected with the gas generator, and the air guiding member is respectively connected with the air guiding bag body and the air bag, the anti-reflux component and the air guiding member connection.
  • the backflow prevention assembly includes a plurality of blades, one end of each of the plurality of blades is connected to an inner wall of the air guide member, and when the front air bag is inflated, the other end of the plurality of blades extends toward the front air bag.
  • the blades are arranged adjacent to each other, and the adjacent blades are in contact with each other;
  • the adjacent vanes When the front airbag is inflated, the adjacent vanes are separated to form an inflated opening for inflating the front airbag;
  • the adjacent vanes contact each other and resist each other, and the inflation opening is closed to prevent the gas in the front airbag from flowing back to the side air curtain.
  • the airbag further includes a pressure limiting member capable of balancing the inflation time of the side air curtain and the front airbag, the pressure limiting member is coupled to the air guiding member, and the pressure limiting member is disposed adjacent to the backflow prevention assembly.
  • the pressure limiting member includes a plurality of first sewing threads for tearing, one end of the plurality of first sewing threads being sewn to the air guiding member and the other end extending in an arc shape.
  • the pressure limiting member includes a plurality of second sewing threads, each of the plurality of second sewing threads includes a fixing portion and a tearing portion, the fixing portion is sewn on the air guiding member, and one end of the tearing portion and the fixing portion Connected and the other end extends in an arc.
  • the pressure limiting member has a funnel shape as a whole.
  • the strength of the fixed section is greater than the strength of the tear section.
  • the frontal airbag further includes an inner pull strap disposed inside the front airbag, and the inner pull strap can restrain the deployed posture of the front airbag when the front airbag is inflated.
  • the frontal airbag is disposed forward of the front and/or rear seat occupant seating area.
  • FIG. 1 is a schematic view showing the installation structure of an airbag in an embodiment
  • FIG. 2 is a schematic view showing the inflation structure of the airbag in one embodiment
  • Figure 3 is a schematic structural view of a gas guiding member in one embodiment
  • FIG. 4 is a schematic structural view of each of the blades of the backflow prevention assembly resisting each other to form a closed structure in one embodiment
  • Figure 5 is a schematic view showing the flow of gas when the backflow prevention assembly shown in Figure 4 forms a closed structure stop gas
  • Figure 6 is a structural view showing a closed structure of each of the blades of the backflow prevention assembly in a further embodiment
  • Figure 7 is a schematic view showing the flow of gas when the backflow prevention assembly shown in Figure 6 is inflated;
  • Figure 8 is a schematic structural view of a pressure limiting member in one embodiment
  • Figure 9 is a schematic view showing the structure of the front airbag after the tearing section of the pressure limiting member shown in Figure 8 is torn;
  • Figure 10 is a schematic view showing the inflation structure of the frontal airbag in one embodiment
  • Figure 11 is a schematic view showing the inflation structure of the airbag in still another embodiment.
  • an airbag includes: an air bag 2 having a side air curtain 21 and a front air bag 22; an air bag 3 for introducing a gas generated by the gas generator 4 into the air bag 2; and, preventing backflow
  • the assembly 7, the backflow prevention assembly 7 is connected to the air guide bag 3, and the backflow prevention assembly 7 can prevent the gas in the front airbag 22 from flowing back to the side air curtain 21 when the front airbag 22 is squeezed.
  • the air bag 2 includes a front air bag 22 and a side air curtain 21, and the front air bag 22 is coupled to one side of the side air curtain 21, and the front air bag 22 is deployed to be vertically disposed with the side air curtain 21, and the front air bag 22 and the side air curtain 21 are provided.
  • the connection is open with an inflation port.
  • the air guiding bag 3 includes an air guiding bag body 31 and a gas guiding member 32.
  • the air guiding bag body 31 is connected to the gas generator 4, and the air guiding member 32 is respectively connected with the air guiding bag body 31 and the air bag. 2, the backflow prevention assembly 7 is connected to the air guide 32.
  • the air guiding member 32 is disposed at an inflation port where the front airbag 22 and the side air curtain 21 are connected.
  • the air guiding member 32 is provided with an air inlet 321 , a first air outlet 322 and a second air outlet 323 .
  • the air inlet 321 communicates with the air guiding bag body 31
  • the first air outlet 322 communicates with the side air curtain 21
  • the second air outlet The 323 is in communication with the front airbag 22, and the backflow prevention assembly 7 is disposed at the second air outlet 323.
  • the backflow prevention assembly 7 can close the second air outlet 323 when the front airbag 22 is inflated to prevent gas backflow in the front airbag 22.
  • the frontal airbag 22 is disposed in front of the rear seat occupant's seating area for providing frontal collision protection for the rear occupant.
  • the side air curtain 21 includes a front side air curtain 211 and a rear side air curtain 212.
  • the front side air curtain 211, the rear side air curtain 212 and the front airbag 22 are integrally connected, and the front side air curtain 211, the rear side air curtain 212 and the front airbag 22 are integrally connected.
  • the connection is open with an inflation port.
  • the inflation port is a three-way inflation port, and the three inflation ports are a front side air curtain inflation port, a rear side air curtain inflation port, and a front air bag inflation port.
  • the air guiding member 32 has two first air outlets 322 and one second air outlet 323, wherein one first air outlet 322 communicates with the front side air curtain inflation port, and the other first one
  • the air port 322 is in communication with the rear side air curtain inflation port
  • the second air outlet port 323 is in communication with the front air bag inflation port.
  • the backflow prevention assembly 7 includes a plurality of blades, one end of which is connected to the inner wall of the air guide member 32.
  • the front air bag 22 When the front air bag 22 is inflated, the other ends of the plurality of blades extend toward the front air bag 22, and the plurality of blades are sequentially Adjacent, the adjacent blades are in contact with each other.
  • the frontal airbag 22 When the frontal airbag 22 is inflated, the adjacent vanes are separated to form an inflating opening for inflating the frontal airbag 22; when the frontal airbag 22 is inflated and then squeezed, adjacent vanes contact each other and resist each other, and the inflating opening is closed. To prevent backflow of gas in the frontal airbag 22 to the side air curtain 21.
  • the backflow prevention assembly 7 includes three blades, which are a first blade 71, a second blade 72, and a third blade 73, respectively, a first blade 71, a second blade 72, and a One end of the three blades 73 is connected to the inner wall of the second air outlet 323.
  • the frontal airbag 22 When the frontal airbag 22 is inflated, the other ends of the first vane 71, the second vane 72, and the third vane 73 extend toward the frontal airbag 22.
  • the first vane 71, the second vane 72, and the third vane 73 are sequentially disposed adjacent to each other, and adjacent vanes are in contact connection.
  • the front air/22 When the front air/22 is inflated, the first blade 71, the second blade 72 and the third blade 73 are separated from each other to form an inflation opening, and the front airbag 22 is inflated; when the front airbag 22 is inflated and then squeezed, the first blade 71.
  • the second blade 72 and the third blade 73 are in contact with each other and resist each other to form a closed knot.
  • the second air outlet 323 is closed to prevent the gas in the front airbag 22 from flowing back to the side air curtain 21.
  • the edges of the first vane 71, the second vane 72, and the third vane 73 are in contact connection.
  • one side of the blade 331 is in contact with one side of the blade 332
  • the other side of the blade 332 is connected to one side of the blade 333
  • the other side of the blade 333 is attached to the other side of the blade 331.
  • One side connection may be disposed on each side of the first blade 71, the second blade 72 and the third blade 73 in contact with each other to enhance the sealing. performance.
  • the first blade 71, the second blade 72 and the third blade 73 each have a certain hardness, and the first blade 71, the second blade 72 and the third blade 733 are in contact with each other to form a right atrioventricular valve structure similar to the right atrium of the human heart. , that is, the tricuspid valve structure.
  • the backflow prevention assembly 7 allows gas to pass through during inflation to inflate the frontal airbag 22. However, the gas charged into the cavity of the frontal air bag 22 cannot be returned to the two air curtain cavities on the side.
  • the tricuspid valve structure is opened, the tricuspid valve is in an open state, and the gas is more likely to flow into the front airbag 22.
  • the front airbag 22 is pressed by the occupant's head, the pressure in the cavity of the frontal airbag 22 is raised, and the backflow prevention assembly 7 is contracted, and the gas in the cavity will reverse the tricuspid valve structure.
  • the reverse thrust of the gas in the cavity of the frontal airbag 22 causes the three blades 331, 332 and 333 to resist each other, and the first blade 71, the second blade 72 and the third blade 73 are mutually restrained to form a closed structure to close the airflow passage.
  • the gas stop effect is achieved, which ensures that the front airbag is kept rigid when squeezed, thereby protecting the occupant's head.
  • first vane 71, the second vane 72, and the third vane 73 are in contact connection.
  • first blade 71, the second blade 72, and the third blade 73 may also be in a superposed contact connection with each other. Specifically, as shown in FIG. 6, one side of the first blade 71 is superposed on one side of the second blade 72, and the other side of the second blade 72 is superposed on one side of the third blade 73. The other side of the third blade 33 is superposed on the other side of the first side 331.
  • the first blade 71, the second blade 72, and the third blade 73 each have a certain hardness, and the first blade 71, the second blade 72, and the third blade 733 are in superposed contact with each other, so that gas can pass when inflated, which is the front airbag 22 Inflated.
  • the gas charged into the cavity of the frontal air bag 22 cannot be returned to the two air curtain cavities on the side.
  • FIG. 7 when the gas flows to the frontal airbag 22, the first blade 71 and the second blade The 72 and the third vane 73 are separated, and the gas can smoothly reach the cavity of the frontal airbag 22.
  • each blade includes three sides, one side thereof.
  • the side is connected to the inner wall of the second air outlet, the other two sides are connected to the side edges of the adjacent blades, and the two side edges connected to the side edges of the adjacent blades are curved and contracted, and the blades are prevented in the extending direction.
  • the outside of the reflow assembly 7 protrudes.
  • the first vane 71, the second vane 72, and the third vane 73 may also be triangular.
  • the backflow prevention assembly 7 includes three blades.
  • the number of specific blades may be set according to actual applications, and may be more than three or less than three.
  • the number of blades may be two, or For four, five or more, the anti-flowback assembly 7 of the above embodiment includes three blades which are merely one embodiment and are not intended to limit the present invention.
  • the airbag of this embodiment is similar to the installation and fixing manner of the common side air curtain, and is specifically mounted on the side wall sheet metal by the generator bracket and the side air curtain buckle.
  • the installation structure of the airbag of the embodiment includes a mounting point fixing buckle 1, an air bag 2, an air guiding bag 3, a gas generator 4, and a generator bracket 5, and an air bag. 2 is connected with the air guiding bag 3, the air guiding bag 3 is connected with the gas generator 4, the gas generator 4 is connected with the generator bracket 5, the mounting point fixing buckle 1 is connected with the side air curtain, and the side air curtain mounting is fixed by the mounting point. 1 and the bolts on the generator bracket 5 are mounted on the side wall sheet metal 6.
  • the airbag of this embodiment adopts the same installation method as the ordinary side air curtain.
  • the tension of each side of the side air curtain can be fixed, and a front airbag is added to the rear airbag. Therefore, a mounting point (not shown) needs to be added between the airbags at the front airbag. Ensure that the airbag can be 100% constrained by the mounting point. Therefore, two mounting points are added at the front airbag position and the distance between the two mounting points is smaller than the distance between the two mounting points at the other areas, making the connection more stable.
  • the generator since three inflatable chambers are provided, the generator is required to be in a short time. Produce more gas. A high power generator or multiple generators are used at the same time to achieve the same effect. Correspondingly, the generator bracket needs to have higher strength to match the generator with large output power. The higher the generator power, the higher the strength of the generator bracket required. In this embodiment, the generator bracket can adopt the yield strength value. 420Mpa ⁇ 520Mpa, made of HC420 material with tensile strength of 470Mpa ⁇ 590Mpa.
  • the airbag of the embodiment integrates the front airbag 22 on the side air curtain to provide front protection for the occupant, and protects the occupant's head and neck when the vehicle collides, reducing the occupant's head and neck injury value.
  • the anti-backflow assembly 7 is disposed at the second air outlet 323 of the airbag.
  • the airflow direction is the same as the vane extension direction, and the first vane 71, the second vane 72, and the third vane 73 are in the airflow.
  • the backflow prevention assembly 7 is in an open state, and gas flows into the cavity of the frontal airbag 22 to inflate the frontal airbag 22.
  • the pressure of the cavity of the front airbag 22 is increased, at which time the gas will push back the anti-backflow assembly 7, and the blades of the anti-backflow assembly 7 resist each other to form a closed structure.
  • the gas is closed to achieve a gas stoppage effect to ensure that the frontal airbag 22 is kept rigid when pressed, and the occupant's head is better protected.
  • the above-mentioned airbag integrates the front protection airbag 22 on the side air curtain, and has a better economical efficiency than the rear seat rear seat for the rear passenger.
  • the airbag 3 further includes a pressure limiting member 8 capable of balancing the inflation time of the side air curtain 21 and the front airbag 22.
  • the pressure limiting member 8 is connected to the air guiding member 32, and is limited to The pressing member 8 is disposed adjacent to the backflow prevention assembly 7.
  • the pressure limiting member 8 is disposed at the second air outlet 323 and located inside the backflow prevention assembly 7, and the pressure limiting member 8 includes a plurality of first sewing threads for tearing, and one end of each of the first sewing threads is sewn to The other end of the air guiding member 32 extends in an arc shape and extends to the inside of the second air outlet 323.
  • each of the first sewing threads extending in an arc shape is not closed, and the pressure limiting member 8 has a funnel shape as a whole.
  • the funnel-like structure can form a stress concentration to direct the gas into the frontal airbag 22, and can effectively control the weaker sewing thread to break only at the funnel structure, i.e., the fixed end.
  • the in-position time required for the side air curtain is about 30 ms, while the in-position time required for the front airbag is about 40 ms.
  • the pressure limiting member 8 is provided to realize the pressure limiting function of the front airbag 22. Specifically, the pressure limiting function is achieved by controlling the strength of the first sewing thread.
  • the first sewing thread is a weaker sewing thread, and the free ends of the first sewing threads are not closed, and the whole has a funnel-like structure.
  • the gas generator 4 inflates the air bag 2
  • the gas pressure does not reach the specified pressure
  • the weak first sewing thread is not damaged, and the inflation of the front air bag 22 will be greatly hindered, and a large amount of gas is charged.
  • the front side air curtain 211 and the rear side air curtain 212 first inflate the front side air curtain 211 and the rear side air curtain 212, and only a small amount of gas enters the front air bag 22 at this time, which facilitates the front air bag 22 to be pushed out from the ceiling.
  • the gas pressure reaches a certain level, the first sewing thread is broken, and the first sewing thread is broken from the funnel, that is, the fixed end, so that the gas enters the front airbag 22.
  • the front airbag has completely pushed open the ceiling.
  • the inflation speed of the front airbag 22 is greatly accelerated by the rupture of the first sewing thread.
  • the side air curtain 21 has been fully pushed open to the ceiling and is deployed downward.
  • inflating the front airbag 22 integrated on the side air curtain 21 is advantageous for reducing the inflation of the front airbag 22 to the ceiling.
  • the above specified pressure of the inflation gas ranges from 20 KPa to 40 KPa.
  • the inner thread of the air guiding member may be torn when the first sewing thread is torn, and the air guiding member 32 is damaged to affect the stability of the airbag.
  • the air guide 32 is protected by providing the second sewing thread 81.
  • the pressure limiting member 8 includes a plurality of second sewing threads 81.
  • Each of the plurality of second sewing threads 81 includes a fixing portion 811 and a tearing portion 812.
  • the fixing portion 811 is sewn on the air guiding member 32, and is torn.
  • One end of the split section 812 is connected to the fixed section 811, and the other end extends in an arc shape and extends to the inside of the second air outlet 323.
  • the strength of the fixed section 811 is greater than the strength of the tear section 812.
  • One end of the fixing portion 811 is sewn to the inner wall of the air guiding member 32, and the other end is sewnly coupled to the tearing portion 812.
  • One end of the tearing portion 812 is sewnly coupled to the fixing portion 811, and the other end of the tearing portion 812 extends to the second air outlet 323. internal.
  • One end of the tearing section 812 extending in an arc shape is not closed, and the whole of the pressure limiting member 8 is funnel-shaped.
  • the pressure limiting member 8 comprises two sewing threads of different strengths, the tearing section 812 has a lower fineness, the fixing section 811 has a higher strength of the thicker sewing thread, and the lower strength tearing section 812 is closed by the sewing.
  • the initial inflation passage diameter of the second air outlet 323 is maintained at a low level.
  • the tearing section 812 is torn from the joint with the fixed section 811, and the tearing section 812 and the fixed section 811 are connected and broken. Thereby increasing the diameter of the inflation passage into the cavity of the frontal airbag 22, which is a frontal airbag 22 fully inflated.
  • the tearing section 812 is coupled to the inner wall of the second air guiding member 32 through the fixing section 811. As shown in FIG. 9, when the specified inflation pressure is reached, the tear section 812 is torn by the joint with the fixed section 811, and the fixed section 811 has a high strength and does not break, thereby causing no damage to the inner wall of the gas guide 32. Damage, effectively protect the inner wall of the air guide member 32, and improve the performance of the airbag.
  • the frontal airbag 22 further includes an inner pull strap that is disposed inside the front airbag 22 to constrain the deployed posture of the front airbag 22 when the front airbag 22 is inflated.
  • an inner pull band 221 is disposed in the front air bag 22.
  • the left end of the inner strap 221 is sewnly coupled to the side wall of the front airbag 22 near the inflation port, and the right end of the inner strap 221 is sewnly coupled to the free end of the front airbag 22, and the upper end and the lower end of the inner strap 221 are not
  • the frontal airbag is stitched.
  • the inner band can restrain the cross-talk of the frontal airbag in the X-axis direction so that the airbag can be deployed toward the positive Y direction, and the inner pull band 221 can restrain the front airbag 22 to ensure the deployed posture of the front airbag.
  • the upper and lower end portions of the inner strap 221 are not sewn to the front airbag 22, and the inner strap 221 is gradually unfolded during inflation, and the gas gradually fills the side of the front airbag 22 toward the occupant through the upper and lower sides of the inner strap 221, So as to avoid the instantaneous inflation to cause damage to the occupant, play a buffering role.
  • the front airbag 22 is deployed with the outer contour as a whole in a cylindrical or triangular configuration, or the front airbag has a wedge-shaped horizontal cross section when the outer contour is deployed.
  • HIC Head Injury Criterion
  • Table 1 Comparison table of 50km/h front rigid collision trolley test
  • Table 2 is a 64km/h offset deformable barrier collision trolley test, equipped with an airbag with a frontal airbag of this embodiment and a side air curtain module with a frontal airbag, and a rear dummy neck. Parameter comparison. Among them, HIC (Head Injury Criterion) head injury index.
  • Table 2 Comparison table of 64km/h offset deformable barrier collision trolley test
  • the airbag of the present embodiment can effectively provide front protection for the occupant, protect the occupant's head and neck when the vehicle collides, and reduce the occupant's Head and neck damage values.
  • the number of front airbags is one, and the front airbag is disposed in front of the rear seat occupant's seating area for providing frontal collision protection for the rear passengers.
  • the air guiding member has two first air outlets and one second air outlet corresponding to three airbag chambers.
  • the present embodiment is not used to define the specific number of front airbags and the position of the front airbag and the number of the first air outlet and the second air outlet.
  • the number of front airbags and the position of the front airbag and the number of air outlets may be specifically set according to actual application conditions, as long as the number of second air outlets on the air guiding member is the same as the number of front airbag cavities.
  • the number of frontal airbags is one, and the frontal airbags are disposed in front of the front seat occupant's seating area for providing frontal occupant with frontal collision protection.
  • the number of front airbags may be more than one, for example, the number of front airbags may also be two, and the two front airbags are respectively disposed in front of the front and rear seat occupant seating areas, and are front and The rear occupants provide front protection.
  • the number of front airbags can be more than two, and the front airbags are respectively arranged in front of each row of seat occupant seating areas, and provide frontal protection for each row of occupants.
  • the number of the second air outlets is correspondingly increased.
  • FIG. 11 is a schematic view showing the inflation structure of the airbag in still another embodiment.
  • the number of front airbags is one
  • the front airbag is disposed in front of the front seat passenger occupant area
  • the front airbag 22 is interposed between the front side air curtain 211 and the driver side airbag 9, when the car is actually colliding
  • the front airbag 22 protects the driver's head for the front passenger. Provide effective frontal protection.
  • the airbag above integrates a front airbag on the side air curtain, and a backflow prevention component is arranged inside the air outlet corresponding to the front airbag, and the backflow prevention component can form a closed structure to close the airflow passage during the collision to ensure the front airbag is squeezed. It still maintains a certain rigidity to better protect the occupant's head.
  • the front airbag popped up by the airbag can provide good protection for the front and rear occupants, reducing the head and neck injuries of the front and rear occupants, and providing full collision protection for the occupants.
  • the integration of the front airbag on the side air curtain is more economical and has a wider application prospect than adding a rear front protection airbag to the rear passengers behind the front seat.

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Abstract

一种安全气囊，包括：具有侧气帘（21）和正面气囊（22）的气袋（2）；将气体发生器（4）产生的气体导入气袋（2）的导气袋（3）；以及，防回流组件（7），防回流组件（7）与导气袋（3）连接，防回流组件（7）能够在正面气囊（22）受到挤压时防止正面气囊（22）内的气体回流至侧气帘（21）。该安全气囊能够保护乘员头部，有效减小乘员的头部及颈部伤害值。

Description

安全气囊 技术领域
本发明涉及汽车配件技术领域，特别是涉及一种安全气囊。
背景技术
安全气囊用于在汽车发生碰撞时为乘员提供有效的防撞保护。通常，在侧面碰撞中保护乘员头部的安全气囊装置采用侧面安全气帘，它能够同时保护多排乘员。
传统的侧面安全气帘安装在侧围钣金上，一般从汽车前柱延伸到到后柱，位于立柱内饰的上方，被顶棚的边缘部分掩藏，从车内不可见。车辆在受到侧面撞击时，ECU(Electronic Control Unit，电子控制单元)发出点火信号后，侧面安全气帘迅速充气，气袋推开顶棚，越过内饰向下方展开，覆盖在侧面车窗区域，并位于座椅侧面与车身内饰之间，在乘员头部与车身及外部坚硬结构之间形成保护垫，从而保护乘员的头部。传统的侧面安全气帘可以形成前排侧面保护气囊腔及后排侧面保护气囊腔，其能保护的范围为从前柱至后柱的侧面区域。
在正面碰撞中，能保护前排乘员头部的安全气囊装置一般是驾驶员安全气囊及副驾驶安全气囊。而对于后排乘员，一般只有安全带起到保护的作用，但在C-NCAP(China-New Car Assessment Program，中国新车评价规程)等法规测试中，往往后排的假人头颈部会因为缺少相应的气囊保护而失去较多分数，导致整车安全评级的下降。
在实际碰撞事故中，都是有角度的碰撞，是同时存在正向和侧向碰撞分量的，因此，对于乘员来说，若只是侧面安全气帘展开，对其保护作用是不完全的。以往，有人提出在前排座椅背面安装安全气囊对后排乘客提供正面碰撞保护，而该种在后排座椅靠背上增加一个安全气囊的方式会带来座椅结构、成本、控制策略等多个复杂的问题，可行性极低，以致至今仍无法应用于市场。
另外，经过实际调查显示，小偏置碰撞形式在交通事故中占整个正面碰撞事故的25％，全部交通事故的15％，因此各高端车型纷纷开始了对汽车进行小偏置碰撞的测试。在这种形式下，典型的车身吸能结构如保险杆，前纵梁无法发挥真正作用，这对汽车安全性特别是气囊的保护性能提出了更高的要求。且从2012年8月份开始，IIHS(Insurance Institute for Highway Safety，美国公路安全保险协会)引入了25％正面偏置碰撞用于评价。在25％小偏置碰撞过程中，由于惯性的作用，驾驶员头部很容易滑入驾驶员侧气囊及侧气帘之间，此部位无气囊的保护将很容易使得驾驶员头部与硬质的A柱塑料板直接接触造成过大的伤害，因此，对前排乘员的正面保护效果较差。
综上所述，传统汽车安全气囊系统无法对乘员提供正面碰撞保护，因此，传统汽车安全气囊系统存在无法对乘员提供全面碰撞保护的技术问题。
发明内容
基于此，有必要针对传统汽车安全气囊系统无法对乘员提供全面碰撞保护的问题，提供一种安全气囊。
一种安全气囊，包括：具有侧气帘和正面气囊的气袋；将气体发生器产生的气体导入气袋的导气袋；以及，防回流组件，防回流组件与导气袋连接，防回流组件能够在正面气囊受到挤压时防止正面气囊内的气体回流至侧气帘。
上述的安全气囊在侧气帘上集成了正面气囊，为乘员提供正面保护，在车辆发生碰撞时对乘员头、颈部提供保护，减小乘员的头部及颈部伤害值，为乘员提供全面碰撞保护。且上述的安全气囊在与正面气囊对应的出气口内部设置防回流组件，当汽车发生碰撞正面气囊受到乘员的撞击挤压时，防回流组件能够形成封闭结构将气流通道封闭，从而达到气体止流效果，防止正面气囊内的气体回流至侧气帘，以保证正面气囊受到挤压时仍保持一定刚度，更好的保护乘员头部。另外，上述的安全气囊将正面保护气囊集成在侧气帘上比单独在前排座椅后方为后排乘员增设一个后排正面保护气囊具有更好的经济性，应用前景广泛。
在其中一个实施例中，导气袋包括导气袋本体和导气件，导气袋本体与气体发生器连接，导气件分别与导气袋本体和气袋连接，防回流组件与导气件连接。
在其中一个实施例中，防回流组件包括多个叶片，多个叶片的一端均连接至导气件的内壁，当正面气囊充气时，多个叶片的另一端均向正面气囊方向延伸，多个叶片依次相邻设置，相邻的叶片相互接触；
当正面气囊充气时，相邻的叶片分开，形成用于正面气囊充气的充气开口；
当正面气囊充气后受到挤压时，相邻的叶片之间相互接触并相互抵制，充气开口关闭，以防止正面气囊内的气体回流至侧气帘。
在其中一个实施例中，上述的安全气囊还包括能够平衡侧气帘与正面气囊充气时间的限压件，限压件与导气件连接，且限压件与防回流组件相邻设置。
在其中一个实施例中，限压件包括多条撕裂用的第一缝纫线，多条第一缝纫线的一端缝制于导气件上，另一端呈弧状延伸。
在其中一个实施例中，限压件包括多条第二缝纫线，多条第二缝纫线均包括固定段和撕裂段，固定段缝制于导气件上，撕裂段一端与固定段连接，另一端呈弧状延伸。
在其中一个实施例中，限压件整体呈漏斗状。
在其中一个实施例中，固定段的强度大于撕裂段的强度。
在其中一个实施例中，正面气囊还包括内拉带，内拉带设置在正面气囊内部，内拉带能够在正面气囊充气时约束正面气囊的展开姿态。
在其中一个实施例中，正面气囊设置在前排和/或后排座椅乘员乘坐区域的前方。
附图说明
图1为一个实施例中安全气囊的安装结构示意图；
图2为一个实施例中安全气囊的充气结构示意图；
图3为一个实施例中导气件的结构示意图；
图4为一个实施例中防回流组件各叶片相互抵制形成封闭结构的结构示意图；
图5为图4所示的防回流组件形成封闭结构止流气体时的气体流向示意图；
图6为又一个实施例中防回流组件各叶片相互抵制形成封闭结构的结构图；
图7为图6所示的防回流组件正向充气时的气体流向示意图；
图8为一个实施例中限压件的结构示意图；
图9为图8所示的限压件撕裂段撕裂后为正面气囊充气的结构示意图；
图10为一个实施例中正面气囊的充气结构示意图；
图11为又一个实施例中安全气囊的充气结构示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
请参阅图1至图3，一种安全气囊，包括：具有侧气帘21和正面气囊22的气袋2；将气体发生器4产生的气体导入气袋2的导气袋3；以及，防回流组件7，防回流组件7与导气袋3连接，防回流组件7能够在正面气囊22受到挤压时防止正面气囊22内的气体回流至侧气帘21。
如图2所示，气袋2包括正面气囊22和侧气帘21，正面气囊22连接至侧气帘21的一侧面，且正面气囊22展开后与侧气帘21垂直设置，正面气囊22和侧气帘21的连接处开设有充气口。
如图1、图3所示，导气袋3包括导气袋本体31和导气件32，导气袋本体31与气体发生器4连接，导气件32分别与导气袋本体31和气袋2连接，防回流组件7与导气件32连接。
具体的，导气件32设置在正面气囊22和侧气帘21连接处的充气口处， 导气件32开设有进气口321、第一出气口322和第二出气口323，进气口321与导气袋本体31连通，第一出气口322与侧气帘21连通，第二出气口323与正面气囊22连通，防回流组件7设置在第二出气口323处，防回流组件7能够在正面气囊22充气后受到挤压时封闭第二出气口323，防止正面气囊22内的气体回流至侧气帘21。
如图2所示，本实施例中，正面气囊22设置在后排座椅乘员乘坐区域前方，用于为后排乘员提供正面碰撞保护。侧气帘21包括前排侧气帘211和后排侧气帘212，前排侧气帘211、后排侧气帘212和正面气囊22一体式连接，前排侧气帘211、后排侧气帘212和正面气囊22的连接处开设有充气口。具体的，充气口为三通充气口，三个充气口分别为前排侧气帘充气口、后排侧气帘充气口和正面气囊充气口。相应的，如图3所示，导气件32具有两个第一出气口322和一个第二出气口323，其中一个第一出气口322与前排侧气帘充气口连通，另一个第一出气口322与后排侧气帘充气口连通，第二出气口323与正面气囊充气口连通。
防回流组件7包括多个叶片，多个叶片的一端均连接至导气件32的内壁，当正面气囊22充气时，多个叶片的另一端均向正面气囊22方向延伸，多个叶片依次相邻设置，相邻的叶片相互接触。当正面气囊22充气时，相邻的叶片分开，形成用于正面气囊22充气的充气开口；当正面气囊22充气后受到挤压时，相邻的叶片之间相互接触并相互抵制，充气开口关闭，以防止正面气囊22内的气体回流至侧气帘21。
具体的，如图3、如图4所示，防回流组件7包括三个叶片，分别为第一叶片71、第二叶片72和第三叶片73，第一叶片71、第二叶片72和第三叶片73的一端均连接至第二出气口323内壁。当正面气囊22充气时，第一叶片71、第二叶片72和第三叶片73的另一端均向正面气囊22方向延伸。第一叶片71、第二叶片72和第三叶片73依次相邻设置，相邻的叶片之间接触连接。当正面气/22充气时，第一叶片71、第二叶片72和第三叶片73之间相互分开，形成充气开口，正面气囊22充气；当正面气囊22充气后受到挤压时，第一叶片71、第二叶片72和第三叶片73之间相互接触并相互抵制，形成封闭结 构，封闭第二出气口323，防止正面气囊22内的气体回流至侧气帘21。
在本实施例中，第一叶片71、第二叶片72和第三叶片73的边缘接触连接。如图4所示，叶片331的一侧边与叶片332的一侧边接触连接，叶片332的另一个侧边与叶片333的一侧边连接，叶片333的另一侧边与叶片331的另一个侧边连接。进一步的，在一个实施例中，为增强各叶片接触时的密封效果，还可以在第一叶片71、第二叶片72和第三叶片73相互接触的各侧边上设置密封条，以增强密封性能。
第一叶片71、第二叶片72和第三叶片73均具有一定硬度，第一叶片71、第二叶片72和第三叶片733之间相互接触，形成类似人体心脏右心房的右房室瓣结构，即三尖瓣结构。防回流组件7使得充气时气体可以通过，为正面气囊22充气。但是，充入正面气囊22腔体内的气体不能返回到侧面的两个气帘腔体内。当给正面气囊22充气时，第一叶片71、第二叶片72和第三叶片73在气流作用下彼此分开，三尖瓣结构打开，三尖瓣处于开口状态，气体较容易流入正面气囊22的腔体内。如图5所示，当车辆发生碰撞时，正面气囊22受到乘员头部挤压，正面气囊22腔体内压力升高，防回流组件7收缩，此时腔体内的气体会反推三尖瓣结构，正面气囊22腔体内的气体反推使三个叶片331，332和333相互抵制，第一叶片71、第二叶片72和第三叶片73之间会相互顶住形成一个封闭结构将气流通道封闭从而达到气体止流效果，此可以保证正面气囊受到挤压时保持一定刚度，从而保护乘员头部。
上述的实施例中，第一叶片71、第二叶片72和第三叶片73之间边缘接触连接。在又一个实施例中，第一叶片71、第二叶片72和第三叶片73之间还可以相互叠加接触连接。具体的，如图6所示，第一叶片71的一侧边叠加在第二叶片72的一侧边上，第二叶片72的另一侧边叠加在第三叶片73的一侧边上，第三叶片33的另一侧边叠加在第一侧边331的另一侧边上。第一叶片71、第二叶片72和第三叶片73均具有一定硬度，第一叶片71、第二叶片72和第三叶片733之间相互叠加接触，使得充气时气体可以通过，为正面气囊22充气。但是，充入正面气囊22腔体内的气体不能返回到侧面的两个气帘腔体内。如图7所示，当气体流向正面气囊22时，第一叶片71、第二叶片 72和第三叶片73分开，气体可以顺利到达正面气囊22腔体内。当正面气囊22受到乘员的撞击挤压时，正面气囊22腔体内压力升高，防回流组件7收缩，第一叶片71、第二叶片72和第三叶片73之间会相互顶住从而起到封住流道达到气体防回流功能，使得正面气囊22可以维持设计刚度的要求。
具体的，在上述实施例中，如图4、图5所示，第一叶片71、第二叶片72和第三叶片73的结构均相同，各叶片均包括三个侧边，其中，一个侧边用于与第二出气口的内壁连接，另外两个侧边与相邻叶片的侧边连接，与相邻叶片侧边连接的两个侧边呈弧状减缩延伸，且叶片沿延伸方向向防回流组件7的外部突出。在其他实施例中，第一叶片71、第二叶片72和第三叶片73还可以呈三角形。
上述的实施例中，防回流组件7包括三个叶片。但是，需要说明的是，本发明并不限定叶片的具体数量，具体叶片的数量可根据实际应用进行设置，可多于三个也可少于三个，如，叶片可以为2个，也可以为4个、5个或更多，上述实施例中防回流组件7包括三个叶片只是一个实施例，并不用于限定本发明。
本实施例的安全气囊与普通侧气帘的安装固定方式类同，具体通过发生器支架和侧气帘卡扣安装于侧围钣金上。如图1所示，在一个实施例中，本实施例的安全气囊的安装结构包括安装点固定卡扣1、气袋2、导气袋3、气体发生器4和发生器支架5，气袋2与导气袋3连接，导气袋3与气体发生器4连接，气体发生器4与发生器支架5连接，安装点固定卡扣1与侧气帘连接，侧气帘安装通过安装点固定卡扣1及发生器支架5上的螺栓安装于侧围钣金6上。
本实施例的安全气囊与普通侧气帘采用相同的安装方式。但是，需要注意的是，侧气帘每个安装点所能承受的拉力是一定的，后排多出了一个正面气囊，因此，在正面气囊处气囊之间需增加安装点(未图示)以保证气囊可以100％被安装点约束。因此，在正面气囊位置处增加两个安装点且该两个安装点之间的距离比其他区域处两安装点间的距离小，使得连接更加稳定。
本实施例中，由于设置三个充气腔体，因此，要求发生器能在短时间内 产生更多的气体。一般采用大功率发生器或同时采用多个发生器以达到等同效果。相应的，发生器支架需要有更高的强度以配合输出功率大的发生器，发生器功率越高，所需要发生器支架强度越高，本实施例中，发生器支架可以采用屈服强度值为420Mpa～520Mpa，抗拉强度为470Mpa～590Mpa的HC420材料制成。
本实施例的安全气囊在侧气帘上集成了正面气囊22，为乘员提供正面保护，在车辆发生碰撞时对乘员头、颈部提供保护，减小乘员的头部及颈部伤害值。且上述的安全气囊第二出气口323处设置防回流组件7，给后排正面气囊充气时，气流方向与叶片延伸方向相同，第一叶片71、第二叶片72和第三叶片73在气流作用下彼此分开，防回流组件7处于开口状态，气体流入正面气囊22腔体内为正面气囊22充气。当碰撞时正面气囊22受到乘员的撞击挤压时，正面气囊22腔体压力升高，此时气体会反推防回流组件7，防回流组件7的各叶片相互抵制形成一个封闭结构将气流通道封闭，从而达到气体止流效果，以保证正面气囊22受到挤压时仍保持一定刚度，更好的保护乘员头部。另外，上述的安全气囊将正面保护气囊22集成在侧气帘上比单独在前排座椅后方为后排乘员增设一个后排正面保护气囊具有更好的经济性，应用前景广泛。
如图3所示，在一个实施例中，上述的导气袋3还包括能够平衡侧气帘21与正面气囊22充气时间的限压件8，限压件8与导气件32连接，且限压件8与防回流组件7相邻设置。
具体的，限压件8设置在第二出气口323处，且位于防回流组件7内侧，限压件8包括多条撕裂用的第一缝纫线，各第一缝纫线的一端缝制于导气件32上，另一端呈弧状延伸，且延伸至第二出气口323内部。
具体的，各第一缝纫线呈弧状延伸的一端呈不封闭状态，限压件8整体呈漏斗状。漏斗状结构可以形成应力集中将气体引导进入正面气囊22，并且可以有效管控较弱缝纫线只有在漏斗结构处即固定端处断裂。
一般的，侧气帘要求的到位时间约为30ms，而正面气囊要求的到位时间约为40ms。为平衡侧气帘21与正面气囊22的到位时间，本实施例中，通过 设置限压件8实现正面气囊22的限压功能。具体的，限压功能通过控制第一缝纫线的强度来实现。第一缝纫线为强度较弱的缝纫线，各第一缝纫线的自由端为不封闭状态，且整体呈漏斗状结构。当气体发生器4给气袋2充气时，且气体压力未达到指定压力时，较弱的第一缝纫线不会被破坏，此时为正面气囊22充气将会受到较大阻碍，大量气体充向前排侧气帘211和后排侧气帘212，先为前排侧气帘211和后排侧气帘212充气，且此时只有微量的气体进入正面气囊22，有利于正面气囊22从顶棚推出。当气体压力达到一定程度时，第一缝纫线会受到破坏，第一缝纫线从漏斗处即固定端处断裂，使得气体进入正面气囊22。此时，正面气囊已完全推开顶棚。与此同时，因第一缝纫线的破裂将极大加快正面气囊22的充气速度。当充气压力达到一定压力时，侧气帘21已经完全推开顶棚向下展开，此时在给集成在侧气帘21上的正面气囊22充气有利于减小正面气囊22对顶棚的充气。
一般的，上述的充气气体指定压力的取值范围为20KPa～40KPa。
进一步的，为避免第一缝纫线直接与导气件32连接，第一缝纫线撕裂时可能造成导气件内壁撕裂，而导致导气件32损坏影响安全气囊的稳定性，在一个实施例中，通过设置第二缝纫线81保护导气件32。
如图8所示，限压件8包括多条第二缝纫线81，多条第二缝纫线81均包括固定段811和撕裂段812，固定段811缝制于导气件32上，撕裂段812一端与固定段811连接，另一端呈弧状延伸，且延伸至第二出气口323内部。
具体的，固定段811的强度大于撕裂段812的强度。固定段811一端缝制于导气件32内壁，另一端与撕裂段812缝纫连接，撕裂段812的一端与固定段811缝纫连接，撕裂段812的另一端延伸至第二出气口323内部。撕裂段812呈弧状延伸的一端呈不封闭状态，限压件8的整体呈漏斗状。
本实施例中，限压件8包含两段强度不同的缝纫线，撕裂段812较细强度较低，固定段811较粗缝纫线强度较高，强度较低的撕裂段812通过缝纫收口，将第二出气口323的初始充气通道直径维持在较低水平，当压力达到一定程度后，撕裂段812从与固定段811连接处撕裂，撕裂段812与固定段811连接断裂，从而增大了进入正面气囊22腔体充气通道直径，为正面气囊 22全面充气。
本实施例中，撕裂段812通过固定段811连接至第二导气件32内壁。如图9所示，当达到指定充气压力时，撕裂段812由与固定段811连接处撕裂，而固定段811强度较高，不会发生断裂，从而不会对导气件32内壁造成损坏，有效保护导气件32内壁，提升安全气囊性能。
在一个实施例中，正面气囊22还包括内拉带，内拉带设置在正面气囊22内部，能够在正面气囊22充气时约束正面气囊22的展开姿态。
具体的，如图10所示，正面气囊22内设置有内拉带221。内拉带221左端部与正面气囊22靠近充气口一侧的侧壁缝纫连接，内拉带221的右端部与正面气囊22的自由端缝纫连接，内拉带221的上端部和下端部不与正面气囊缝合。在点爆时，内拉带可以约束正面气囊在X轴方向的串动使得气囊可以朝着正Y方向展开，内拉带221能够约束正面气囊22，保证正面气囊的展开姿态。另外，内拉带221的上下两端部没有与正面气囊22缝合，在充气过程中内拉带221逐渐展开，气体经内拉带221的上下两侧逐渐充满正面气囊22朝向乘员的一侧，从而避免瞬间充气对乘员造成伤害，起到缓冲作用。
在一个实施例中，正面气囊22展开后外轮廓整体呈柱体或三角体结构，或正面气囊展开后外轮廓的水平截面呈楔形。
参见表1，其为50km/h正面刚性碰撞时，装有本实施例带正面气囊的安全气囊与普通不装带有正面气囊的侧气帘模块，后排假人颈部参数对比。其中，HIC(Head Injury Criterion)头部伤害指标。
表1：50km/h正面刚性碰撞台车试验对比表
Figure PCTCN2017085427-appb-000001
参见表2，其为64km/h偏置可变形壁障碰撞台车试验，装有本实施例带正面气囊的安全气囊与普通不装带有正面气囊的侧气帘模块，后排假人颈部参数对比。其中，HIC(Head Injury Criterion)头部伤害指标。
表2：64km/h偏置可变形壁障碰撞台车试验对比表
  Side IIs假人 Side IIs假人
参数变量 本发明气囊 普通气帘
假人伤害值HIC 15 480 693
颈部位移量(Nm) 29 29.3
颈部Z向受力(N) 1710 2770
颈部X向受力(N) 885 1000
胸部压缩量(mm) 46 38.7
从以上表1、表2的分析对比中，可以看出，采用本实施例的安全气囊能有效地为乘员提供正面保护，在车辆发生碰撞时对乘员头、颈部提供保护，减小乘员的头部及颈部伤害值。
上述实施例中，正面气囊的数量为一个，且该正面气囊设置在后排座椅乘员乘坐区域前方，用于为后排乘员提供正面碰撞保护。相应的，导气件具有两个第一出气口和一个第二出气口对应为三个气囊腔体充气。但是，需要说明的是，本实施例并不用于限定具体的正面气囊数量和正面气囊的设置位置以及第一出气口和第二出气口的数量。实际应用中，可根据实际应用情况具体设置正面气囊数量和正面气囊的设置位置以及出气口的数量，只要保证导气件上的第二出气口数量与正面气囊腔体的数量相同即可。如，在又一个实施例中，正面气囊的数量为一个，正面气囊设置在前排座椅乘员乘坐区域前方，用于为前排乘员提供正面碰撞保护。在其它实施例中，正面气囊的数量可以多于一个，如正面气囊的数量还可以为2个，2个正面气囊分别设置在前排和后排座椅乘员乘坐区域前方，同时为前排和后排乘员提供正面保护。对于不同车型，正面气囊的数量还可以为2个以上，各正面气囊分别设置在各排座椅乘员乘坐区域前方，同时为各排乘员提供正面保护。当正面气囊为多个时，相应的增加第二出气口的数量。
如图11所示，其为又一个实施例中安全气囊的充气结构示意图。在本实施例中，正面气囊的数量为一个，正面气囊设置在前排座椅乘员乘坐区域前方，正面气囊22介于前排侧气帘211与驾驶员侧气囊9之间，当汽车在实际碰撞过程中发生了类似与小偏置碰撞的情况时，乘员滑入前排侧气帘211与驾驶员侧安全气囊9之间时，此时正面气囊22对驾驶员头部进行保护，为前排乘员提供有效的正面保护。
本实施例与上一实施例的区别仅在于正面气囊的设置位置不同，相应的，根据正面气囊的位置调整充气口的位置及安装点的设置位置即可，其它结构均与上一实施例相同，在此不予赘述。
上述的安全气囊在侧气帘上集成了正面气囊，且在与正面气囊对应的出气口内部设置防回流组件，防回流组件在碰撞时能够形成封闭结构将气流通道封闭，以保证正面气囊受到挤压时仍保持一定刚度，更好的保护乘员头部。在汽车正面碰撞过程中，上述安全气囊弹出的正面气囊可以很好的为前、后排乘员提供保护，减小前、后排乘员的头部及颈部伤害值，为乘员提供全面碰撞保护。同时，将正面气囊集成在侧气帘上比单独在前排座椅后方为后排乘员增设一个后排正面保护气囊具有更好的经济性，具有广泛的应用前景。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种安全气囊，其特征在于，包括：具有侧气帘和正面气囊的气袋；将气体发生器产生的气体导入所述气袋的导气袋；以及，防回流组件，所述防回流组件与所述导气袋连接，所述防回流组件能够在所述正面气囊受到挤压时防止所述正面气囊内的气体回流至所述侧气帘。
  2. 根据权利要求1所述的安全气囊，其特征在于，所述导气袋包括导气袋本体和导气件，所述导气袋本体与所述气体发生器连接，所述导气件分别与所述导气袋本体和气袋连接，所述防回流组件与所述导气件连接。
  3. 根据权利要求2所述的安全气囊，其特征在于，所述防回流组件包括多个叶片，多个所述叶片的一端均连接至所述导气件的内壁，当所述正面气囊充气时，多个所述叶片的另一端均向所述正面气囊方向延伸，多个所述叶片依次相邻设置，相邻的所述叶片相互接触；
    当所述正面气囊充气时，相邻的所述叶片分开，形成用于所述正面气囊充气的充气开口；
    当所述正面气囊充气后受到挤压时，相邻的所述叶片之间相互接触并相互抵制，所述充气开口关闭，以防止所述正面气囊内的气体回流至所述侧气帘。
  4. 根据权利要求2所述的安全气囊，其特征在于，还包括能够平衡所述侧气帘与所述正面气囊充气时间的限压件，所述限压件与所述导气件连接，且所述限压件与所述防回流组件相邻设置。
  5. 根据权利要求4所述的安全气囊，其特征在于，所述限压件包括多条撕裂用的第一缝纫线，多条所述第一缝纫线的一端缝制于所述导气件上，另一端呈弧状延伸。
  6. 根据权利要求4所述的安全气囊，其特征在于，所述限压件包括多条第二缝纫线，多条所述第二缝纫线均包括固定段和撕裂段，所述固定段缝制于所述导气件上，所述撕裂段一端与所述固定段连接，另一端呈弧状延伸。
  7. 根据权利要求5或6所述的安全气囊，其特征在于，所述限压件整体呈漏斗状。
  8. 根据权利要求6所述的安全气囊，其特征在于，所述固定段的强度大于所述撕裂段的强度。
  9. 根据权利要求1所述的安全气囊，其特征在于，所述正面气囊还包括内拉带，所述内拉带设置在所述正面气囊内部，所述内拉带能够在所述正面气囊充气时约束所述正面气囊的展开姿态。
  10. 根据权利要求1所述的安全气囊，其特征在于，所述正面气囊设置在前排和/或后排座椅乘员乘坐区域的前方。
PCT/CN2017/085427 2016-05-25 2017-05-23 安全气囊 WO2017202280A1 (zh)

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US10974683B2 (en) 2021-04-13
US20190071047A1 (en) 2019-03-07

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