What is the function of seat belts?

[Adaline]

The main functions of seat belts are as follows: 1. Restrict displacement and provide cushioning, absorbing impact energy and counteracting inertia. 2. In emergency situations, seat belts can quickly tighten and restrain occupants in their seats, ensuring the safety of vehicle occupants and thereby reducing injuries. Below is the process of how seat belts protect drivers: (1) When a strong frontal collision occurs, due to inertia, the driver and passengers' bodies move forward rapidly. At this point, the seat belt exerts force to "pull back" the occupants' bodies, absorbing part of the impact energy, while the airbag inflates and fully deploys "in the blink of an eye." (2) Next, the upper body of the occupants sinks into the airbag, and gas begins to escape evenly from the airbag's exhaust vents, absorbing most of the impact energy. (3) Finally, the occupants' bodies move backward and return to their seats.

[RichardRose]

The seat belt is primarily designed to prevent you or your passengers from being thrown out of the vehicle or hitting hard objects inside the car in the event of an accident while driving. It disperses the impact force to the stronger parts of the body, such as the chest and hips, reducing the likelihood of injury. Think about it—if you suddenly brake or collide with the car in front, without wearing a seat belt, you could directly hit the steering wheel or windshield, causing severe head and neck injuries. Having driven for many years, I always remind my family to buckle up, especially when children are in the car—it’s a lifesaving necessity. Statistics show that wearing a seat belt reduces the risk of fatal injuries by more than 50%. Developing this habit takes just a second, but it can change a lifetime.

[TannerMarie]

From my daily driving perspective, seat belts are like invisible guardian angels. They securely hold you in place, preventing you from being thrown around during sharp turns or collisions. This not only protects you personally but also ensures airbags function effectively—without the belt, a deploying airbag could actually cause harm. I always remind friends, especially on long trips, that buckling up reduces the risk of fatigued driving and brings peace of mind. Recalling a few minor accidents, wearing the belt meant only slight jolts, avoiding fractures or concussions. Regularly check for wear or looseness to maintain optimal functionality.

[SanLandon]

The core function of seat belts is based on physics: when a vehicle stops suddenly, your body continues moving forward; the belt restrains you, slowing deceleration to prevent violent impact. This three-point design evenly distributes force, protecting the sternum and internal organs. During daily driving, it reduces ejection risk during rollovers and prevents secondary collisions, such as hitting doors or the ground. Remember, even at low speeds, buckling up is crucial – a collision at 30 km/h can cause severe injuries. Make it a habit every time you get in the car.