| 摘要 |
PROBLEM TO BE SOLVED: To provide a headrest device of a seat for a vehicle capable of absorbing energy of an impact load by a simple constitution.SOLUTION: A headrest device of a seat for a vehicle includes a headrest body 20 arranged in an upper part of a seat back of the seat for the vehicle, and an energy absorbing mechanism 30 arranged inside this headrest body 20. The energy absorbing mechanism 30 has a first bag part 31 and second bag parts 33 filled with a flow body and capable of contracting and expanding. The first bag part 31 and the second bag parts 33 are communicated so that the flow body can be taken in and out by orifices 35. When an impact load acts on the headrest body 20, fluid in the first bag part 31 flows in the second bag parts 33 via the orifices 35, and the energy of the impact load is absorbed thereby. |
