First of all, it will be broken when its normal service life is reached. How long is the life of the seat belt? A rough calculation is about 3 to 5 years. This is mainly the life of the spring coil inside the seat belt. Of course, this is not to say that after 3 years, the seat belt will suddenly break and become useless. Rather, the performance of the seat belt reel is the best in 3 years, after which it will slowly start to age. How to judge whether it is aging?
It mainly depends on whether the seat belt feels looser than before, and if we pull the seat belt violently, sometimes we cannot tighten the seat belt in time, which leads to too much margin for the seat belt tension and cannot be pulled in time. Live the emergency brake body. At this time, it is basically the life of the seat belt.
However, many of our automobile manufacturers also do durability tests of seat belts. For example, some published data can stretch 50,000 times. We can calculate it. If you stretch 10 times a day, it will only take a year. 3650 times, 36500 times in ten years, there is still a margin of 50,000 times.
However, this is only laboratory data after all. In our actual use, there will be time factors that will accelerate the aging. In addition, every time the seat belt is pulled out, in fact, the spring coil has been continuously tightened. Force, coupled with factors such as high temperature, low temperature, humidity, etc. in the environment, just looking at the data in the laboratory is definitely not reliable.
Therefore, in general, our seat belts should be paid attention during the period of 3 to 5 years. If they are too loose or jammed in time, we must consider replacing them.
