During the racing process, its vehicle rushed into the crowd for driving reasons, resulting in two injuries, 10 injured, but the racer escaped with injuries, enabling him to escape safely. Since then, seat belts have been designed and installed in cars. This is a seat belt.
1958, nils boleyn was appointed as the chief safety engineer by the then President of Volvo. His 1 task is to design a real seat belt to equip Volvo's latest car.
When nils bolin. The biggest challenge he faces is to find a simple and effective solution so that people can complete this safe process with one hand. So he summed up a golden rule, that is, the seat belt must include the part around the hips or thighs, and the part that spans the first half of life, that is, the diagonal part of the chest, which constitutes a very correct shape, that is, the seat belt can span your pelvis and ribs and be firmly fixed at the lower part of the seat.
The geometry of the seat belt is V-shaped, and the top of the intersection is close to the floor, so that the seat belt can be effectively kept in the right position when stressed and will not move at will. This greatly protects the safety of drivers and passengers.
This is the birth of the V-type three-point seat belt. This design not only conforms to the principle of engineering mechanics, but also adds humanized design. 1959, nils boleyn applied for the invention patent of V-type three-point seat belt, and equipped it on Volvo's newly listed car models.