Abstract
In this paper, it is investigated by focusing to stiffness balance of seat-frame as one of the measures to reduce neck injury. The balance of the seat-frame stiffness, it is thought that to reduce the motion difference between the head and torso causing neck injury. First, we will describe an idea of balance the seat-frame stiffness to reduce neck injury. Next, the experiments for carrying out the verification of the energy absorption that is considered essential to the balance of the seat-frame stiffness. Finally, we will discuss the control of motion difference between the head and torso in the experimental results and the seat frame stiffness.
