Trepunktsbegrensninger

Trepunktsbegrensninger refers to a type of safety belt system commonly found in vehicles. It is characterized by having three points of contact for securing a person: one point at the hip, another at the opposite hip, and a third over the shoulder. This design aims to distribute the force of impact across the strongest parts of the human body in the event of a collision, thereby minimizing the risk of severe injury.

The invention of the trepunktsbegrensning is credited to Nils Bohlin, a Swedish engineer who developed it for Volvo in 1959. Prior to its widespread adoption, lap belts and two-point belts were the standard, offering less protection. The introduction of the trepunktsbegrensning was a significant advancement in automotive safety, dramatically reducing fatalities and serious injuries in car accidents.

Modern trepunktsbegrensninger typically include a retractable webbing strap, a buckle, and a locking mechanism. The webbing automatically extends and retracts, allowing for freedom of movement during normal driving. However, in sudden deceleration or impact, the locking mechanism engages, holding the occupant securely in place. Many systems also incorporate pre-tensioners that rapidly tighten the belt at the moment of impact, further enhancing occupant protection. The trepunktsbegrensning is now a mandatory safety feature in most countries worldwide.