What is the function of a seat headrest?

[SanOlive]

The function of a seat headrest is to prevent the passenger's cervical spine from being injured due to inertia in the event of a rear-end collision or other safety accidents. During a rear-end collision, the passenger's head will suddenly jerk backward. Without a headrest, this can cause severe whiplash injuries. A headrest effectively mitigates the significant impact force during a collision, preventing excessive backward movement of the head and subsequent neck injuries. As a safety device, seat headrests have gradually become standard in vehicles and are now mandated by national safety standards. All vehicle models must be equipped with headrests for both front and rear seats, and there are strict regulations regarding the material, strength, energy absorption, position, and size of the headrests.