Everyone knows the safety belt from a scientific point of view refers to the means of passive safety. The fixing element of any vehicle is used to hold the person in the seat in case of emergency braking or stopping.
Before you deal with the types and principles of seat belts, consider the background and historical facts of the creation.
The first belts for car drivers were not designed for them at all. The original prototype belt was invented in 1885 to fix the coachman on the carriage with the help of hooks and carbines. It must be said that the first version of the security element was patented in the United States of America. Note that the original samples of seat belts were significantly different from modern models, but the appointment remained the same.
It is noteworthy that the fixing belts were used on aircraft. So, in 1913 the Frenchman Adolf Pegu fixed his body with straps to perform the trick “dead loop” . However, the elements of safety in airplanes were fully used only in the thirties of the twentieth century.
In the automotive industry, belts came with riders in the twenties of the twentieth century. But in those days, the fixing belts were very uncomfortable for daily use and were not widely used in mass production.
In the early fifties of the twentieth century, seat belts entrenched in the automotive industry. American inventors have designed a fixing element with fasteners at the abdominal level. It had a shape, as in straps on air transport – it was fixed to the side and fixed the body at the level of the waist section. But such design solutions existed relatively little. This is due to the fact that in case of accidents at high speeds, the fixing elements caused damage to the organs inside the peritoneum.
In this regard, the issue of improving the design was very acute. Protective belts in cars began to look like the letter “yawn”. But they also hurt a lot of drivers.
In the traditional form, the seat belts were designed only in the second half of the fifties by Swede engineer Bolin. He introduced another fixing base, and the distribution of pressure on the torso became even. This was taken advantage of by Volvo. Since 1959, all produced cars have been equipped with seat belts.
In the process of operation drivers and passengers revealed one significant drawback of the belt – the person slipped out from under the belt. This is due to the fact that the belts were movable, and the tension was adjusted manually. Fortunately, in the seventies invented an inertial safety belt, the principle of which is used to this day.
Thus, for almost a hundred years, mankind has been developing a truly safe element of fixing a person in the car. Modern models of seat belts are being modernized, but the function itself and the principles of action remain the same.
Everything flows, everything changes. The same thing happens with the elements of the transport security system. To date, the types of belts have the following classification:
1. Femoral – rarely used or only in the backseat of cars. They do not provide proper fixation of the passenger in place.
2. Belt – a vivid example – seat belts on the plane. He wraps the waist part of the body and does not restrain movement.
3. Shoulder – was widely used in the sixties. Strap goes from the femoral to the shoulder. The design was uncomfortable, as passengers slipped out from under the belt.
Depending on the design features, three-point belts are inertial and non-inertial. The first type is pulled into the body wall when unfastened automatically. To fasten this structure, you need to pull out the tape and snap the mechanism.
In recent years, inertial belts with a pre-tensioner are often used. In the situation of an accident, they regulate the force of holding a person in place.
Any design can be installed in your car both at the driver’s and the passenger’s place. When selecting an option, it is necessary to take into account not only the level of safety, but also the comfort when moving the body.
Many drivers neglect the belt fastening, justifying it with discomfort. However, such an element of security can save your life in an accident situation.
Alas, many drivers do not take seriously the safety of their lives and health. The seat belt can save lives in the event of an accident or collision.
All designs, one way or another, have negative aspects of application. The same goes for safety belts. Among the disadvantages of belts can be noted:
Despite the listed situations, when the belt can lead to unfortunate consequences, most drivers do not buckle up for other reasons. This is due to the myths that emerged among motorists as a background not to use the belt.
At a small speed you can not wear yourself. This is true if you are driving on a deserted road. In reality, you can drive another car at high speed.
If you go for a short distance, then why fasten your seat belt? You can never be sure that within 10 meters of the house you will not encounter other traffic participants.
If a person is sitting in the back, sitting, then it is not necessary to fasten. It’s not only safe for the passenger, but for the driver. At impact, a person in the backseat crashes into the driver by inertia. Well, getting injuries as a result of overturning many will not escape.
If you take a driver’s seat, it’s safe. The unfastened man in the back seat has as many chances to fly out into the front glass during a collision, just like a driver.
Safety belts – a thing uncomfortable and only interferes with driving. In reality, this is a matter of habitual behavior. In addition, now you can pick up such belts that will not give you any discomfort when driving a car.
Buckling up, it is difficult to hold children in their arms. This version of the trip is extremely dangerous to practice. In the event of a blow, the child can fly out of the hands and get numerous injuries. It is best to use special chairs to transport children. Then the child will be safe.
Thus, in the presence of shortcomings and myths, seat belts are an integral element of any transport device (with the exception of motorcycles, quads and the like). To be fastened or not while driving by car – business especially personal. However, remember that seat belts are not invented anyhow why.
Statistics show that in seventy percent of rescue in critical situations, passengers and drivers are required to wear a safety belt. They can save lives even in the biggest accidents and clashes.
Date: 30.10.18 Views: 147