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【Concept 】
Department personnel who tape in the car, the passenger in the car and driver for the guarantee to prevent the passenger airbag injury is ejected when the device body has been severely hit.
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【Classification terminology 】
Three-point seat belts standard form --- Niels invention, this car seat belts came to prominence began in 1967 accepted
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【Termaction process 】 (ideal seat belts)
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1, the seat belt pretensioner device when the accident occurred
People forward, seat back, this time, if the seat belt is too loose. The consequences are likely to be: the occupant from sliding out of the seat belt below: Or, who has met airbags, seat belt due to the tension at a time when more than excessive and failed to tighten, which failed to advance to eat as hoped off part of the momentum, but the entire burden are handed over to the balloon.
Both cases are likely to cause serious injury occupant.
But the problem is properly installed seat belts. Its loose room come from?
First, because the occupant clothing itself has a certain thickness, in addition to the seat belt apparatus is partially hidden loose much room, the room can not be eliminated, but really an accident, it should also try to eliminate.
How to do?
For this reason there is such a seat belt pretensioner device which is responsible for providing instant taut belts.
Its role process is:
A crash sensor collects the information, and then release the electrical pulse which is transmitted to the gas generator, detonated gases.
The rapid expansion of the gas explosion in the pipe, the pressure to the so-called ball chain, channeling the ball forward in the tube, turn the disk drive ratchet.
Detent plate with uranium as a single entity, the seat belt on around the shaft.
Simply put, the gas pressure to make the ball move, the ball detent disk drive transfer, disk drive pawl pivots - instantly realize the function of the seat belt pretensioners.
From the perception of the accident to complete the whole process of seat belt pretensioner lasts only thousandths of a second.
Length of the cavity end of the pipe is used to shelter or roll over the ball.
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2, after the accident, the seat belt force limiters
Under the action of the seat belt pretensioner device has been tightened. But we hope that after the peak force in the past, the intensity of the seat belt tensioner immediately lowered to reduce crew force, this particular task is accomplished by the seat belt force limiters: the seat belt device, such as a pre- the pretensioner device, the belt is wound around the bottom.
Inside is a steel shaft torsion bar. When the load reaches a predetermined condition, reversing rods began twisting, so relax a seat belt to a certain extent, to achieve a seat belt force limiters function.
Under the joint action seatbelt pre-tensioners and belt force limiters, belt protection almost reached the desired state. See the so-called spirit in subtle, sophisticated occupant safety belt does give trust to provide security.
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【Term works 】
Device has a card inside the belt wheel, quickly pulling the case if the seat belt, for example, a car accident, which would be due to the rapid rotation of the clamp rollers and belts out by centrifugal force, quickly lock the seat belt, the person on the seat is fixed to the chair.
Seat belts will relax to avoid the peak to be bruised ribs human impact in the past, or who have been able to receive protection when the airbag.
From the above series of actions to achieve the objective to ensure the safety of occupants.
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【Material term 】
Material: nylon webbing, high-strength polyester webbing
Function: tensile strength, abrasion resistance, anti-ultraviolet
Applications: automobile seat belts, infant seats
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【Article is excerpted from: Web Search】
【Reserved Integrate / Just Reference】
【Translation is by The Network】
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