Why does the seatbelt not lock when pulled hard?

[Alex]

When the seatbelt does not lock when pulled hard, first carefully check if there are any foreign objects inside the seatbelt buckle to determine if the buckle's failure to lock is caused by such objects. If foreign objects are found inside, remove them and check if the seatbelt can still be used. If it functions properly, it can continue to be used. The function of seatbelts: Seatbelts work by reducing the secondary impact force that poses a risk of internal collision, thereby decreasing the likelihood of death or severe injury in traffic accidents. They ensure proper positioning of passengers to maximize the effectiveness of airbags (if equipped) and prevent passengers from being ejected from the vehicle or experiencing rollovers during a collision. How to use seatbelts: When properly worn, the shoulder strap should cross the chest, and the lap belt should fit snugly over the hip bones. This is primarily to direct the impact force during an accident onto the bones rather than the soft internal organs. Although the buckle makes a "click" sound when fastened, it is still advisable to tug on the seatbelt to ensure it is securely locked and undamaged. This is a step many car owners overlook when using seatbelts.