The seat belt is one of the important equipment to help limit injury to the person sitting in the car when a collision occurs. Besides the protective function, the structure and condition of the seat belt can also provide some useful signs when checking used cars.
How does the belt work?
According to Mr. Tran Minh Tien - lecturer of Automotive Technology, Dung Quat College of Technology (Quang Ngai), in normal condition, the belt can be pulled out and retracted relatively easily. When the belt is pulled out too quickly or the car slows down sharply, the lock mechanism in the belt rolling system can be activated, preventing the belt from continuing to release.
The belt rolling system usually uses a mechanical lock mechanism, operating based on the belt pulling speed and vehicle movement. When the lock mechanism is activated, the belt is held, limiting the rider's forward movement.
In some collision situations, the car may be equipped with a seat belt stretcher. This mechanism can be activated to quickly stretch the seat belt, helping to keep the occupant in a suitable position and support the safety protection system.
Therefore, belts being locked when pulled quickly or suddenly may be a normal phenomenon. However, if the belt cannot be pulled out, does not retract itself, or the locking mechanism operates abnormally, it is necessary to check the system.
Tips for checking seat belts to help recognize abnormal signs on old cars
According to Mr. Tien, when buying a used car, users can pull the belt out almost the entire journey to observe the belt part that is usually deep inside the roll.
If this area shows signs of mold, dirt, discoloration or abnormal odor, this may be a sign that needs to be noted regarding the condition of storage or the possibility that the vehicle has been in contact with water, including cases of flooding.
Therefore, when buying a used car, in addition to the abnormal signs of the seat belt, buyers also need to check the car floor, seat legs, electric jacks, control box, storage compartment and low positions in the car. At the same time, it is recommended to ask experienced technicians to check and evaluate the overall situation to get the most accurate results about the car's condition before deciding to buy.
