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　　. Importance of headrest height

　　

　　The headrest is an important part of the car seat, which can effectively protect the driver and passenger¨s head and neck from impact. The correct headrest height can ensure that the headrest can play the greatest protective role when the vehicle is hit violently.

　　

　　. How to adjust the headrest height

　　

　　First, the driver should adjust the car headrest height to be flush with the head. This is because the softest and most protective part of the headrest is in the middle of the headrest. Only when the headrest height is flush with the head can the headrest effectively protect the head and cervical spine.

　　

　　Next, the driver should ensure that the distance between the back of the head and the headrest is as small as possible. From a physical point of view, the smaller the distance between the back of the head and the headrest when the car is hit, the greater the cushioning effect of the headrest on the head and neck. This distance should not exceed 4 cm at most, which is equivalent to the width of two fingers side by side.

　　

　　In addition, the driver should also pay attention to the way the headrest is fixed. Some car headrests can be adjusted by rotating or sliding, while others need to be adjusted by disassembly and reinstallation. Either way, the driver should ensure that the headrest is firmly fixed to the seat to prevent it from shifting in the event of a vehicle collision.