The safety of automobiles has always been a concern of consumers. ABS, airbag, safety cabin structure and other devices have become fashionable terms that people talk about. It seems that only cars equipped with these devices can be upgraded. In fact, in the event of a traffic accident, it is our most common safety device-seat belt that plays the greatest role in ensuring people's safety.
The original car seat belt was invented by Sweden. Since seatbelts became the standard of Buick cars in the 1940s, the installation and use of seatbelts in the United States has been made a mandatory federal regulation, which started the large-scale popularization of seatbelts. At that time, the seat belt was only a simple two-point waist restraint, and its tightness was completely adjusted by the driver himself.
After more than 40 years of development, seat belts have gradually matured. Nowadays, seat belts are made of synthetic fibers with high strength, and the retractor with self-locking function adopts three-point design, which restricts the shoulders and waist of drivers and passengers at the same time. After the seat belt is fastened, the retractor automatically tightens. When the vehicle has an emergency braking, frontal collision or rollover, the occupant will make the seat belt stretch rapidly and violently. At this time, the self-locking function of the retractor can clamp the seat belt in an instant, so that the occupant can cling to the seat and avoid falling out of the car or being injured due to collision.
With the progress of science and technology, people have developed the auxiliary facilities of seat belts-airbags. Its working principle is that when a vehicle collides, the control module quickly processes the signal to confirm that the severity of the collision has exceeded the protective ability of the seat belt, and then quickly releases the airbag, so that the head and chest of the occupant can directly contact with the soft and elastic airbag, and the injury of the occupant can be reduced through the cushioning effect of the airbag. Later, Volvo Car Company developed anti-side collision airbags and gradually improved the types of airbags. However, it is necessary to remind everyone here that airbags can not only protect passengers, but also have serious lethality to passengers who do not wear seat belts. The explosive force of the airbag is amazing enough to break the driver's cervical vertebra!
According to the statistics of relevant institutions, in all potentially fatal car accidents, if the seat belt is used correctly, about 45% of lives can be saved; If airbags are used at the same time, the proportion will rise to 60%.
So don't forget to fasten your seat belt when driving.
Airbag is a very important protective device, but it is a safety auxiliary device under the premise of fastening the seat belt. In the event of a rear collision, side collision or rollover, the airbags in the driver's seat and the passenger's seat will not deploy. If you don't fasten your seat belt, airbags alone can't provide enough protection for passengers, and passengers may be knocked out of the car. In addition, the airbag can only be used once, and it has no effect on the secondary collision in continuous collision accidents. In the event of a frontal collision, if the seat belt is not fastened, emergency braking will make the occupant's body rush forward, and the airbag will deploy at this time, which may cause great harm to the occupant.
As can be seen from the above, seat belts are more important.
Seat belts are more important.
In addition to the damage to the vehicle itself, there are two main reasons for the injury of the occupants in the vehicle caused by traffic accidents, namely, the occupants are thrown out of the vehicle, or the occupants hit the steering wheel, dashboard, windshield and other objects in the vehicle. In view of this, automobile manufacturers are equipped with restraint safety systems on vehicles, which, as the name implies, are devices that restrain passengers on seats, including seat belts and airbags, in which seat belts play a major role.
The original car seat belt was invented by Sweden. At that time, the seat belt was only a simple two-point waist restraint, and the tightness of the restraint was completely adjusted by the occupants themselves. After more than 40 years' development, the typical seat belts in the contemporary era all adopt retractors with self-locking function, and at the same time, the three-point design for restraining the shoulders and waist of drivers and passengers is realized. The seat belt itself is made of synthetic fiber and has great strength. After the occupant wears the seat belt, the retractor is automatically tightened to a degree that can not only protect but also be comfortable, and the occupant can still move freely. When the vehicle suddenly brakes, collides head-on, or rolls over, the occupant will make the seat belt stretch rapidly and violently. At this time, the self-locking function of the retractor can clamp the seat belt in an instant, so that the occupant can cling to the seat and avoid falling out of the car or being injured by collision.
Let's talk about airbags. Airbags were invented in 1950s, and used in the automobile industry 1. The standard term for this device is "auxiliary inflatable restraint system". Its function is that when a vehicle collides, the sensor sends a signal to the airbag control module (the core of which is the computer chip), and the control module processes the signal to confirm that the severity of the collision has exceeded the protective ability of the seat belt, and then releases the airbag, so that the head and chest of the occupant can directly contact with the softer and more elastic airbag. On the other hand, the role of airbags is not as perfect as many people think. First, the airbag pops up at explosive speed. If the occupant directly hits the airbag that is being ejected, the head and chest will be seriously injured. In fact, there have been many cases of airbag death abroad. Secondly, when the airbag pops up at high speed, the instantaneous surface temperature is above 90℃, and the occupant's face will generally be burned when it touches it; Thirdly, after the airbag pops up, the airbag device itself, steering wheel, dashboard and so on. Where the airbag is installed, even the windshield will be irreparably damaged, causing huge economic losses. If the occupant does not wear a seat belt when the airbag bursts and fails to slow down the forward speed of the body through the restraint of the seat belt, the harm caused by the airbag to the human body will be even more terrible. Because of this, the airbag is called "auxiliary inflation restraint system", that is, it is a supplement to the seat belt and plays a protective role when the seat belt alone is not enough to completely resist the danger. At the same time, the danger of the airbag itself must also be reduced by the safety belt. Foreign statistical studies have confirmed that more than 70% of the survivors in car accidents rely entirely on the role of seat belts, and the role of airbags is less than 30%.
Through a large number of simulation tests and statistical studies abroad, it is believed that in all possible fatal car accidents, if the seat belt is used correctly, about 45% of lives can be saved; If you use seat belts and airbags at the same time, this ratio will rise to about 60%; If only airbags are used, the proportion will not exceed 5%. Therefore, to ensure the safety of passengers, the fundamental way is to avoid accidents. Please remember: cherish life and drive safely.