Patent ID: 8104592

Claim:
A damper device, comprising: a cylinder body; and a piston body slidably disposed in the cylinder body, at least one of the cylinder body and the piston body being adapted to be attached to an article subject to damping so that the damping is applied to movement or relative movement of the article subject to the damping, said cylinder body comprising: an inner part facing the piston body and having a run-through hole; and a stopper body disposed at a side, opposite to the piston body relative to the inner part and having a shaft part slidably situated in the run-through hole, said shaft part forming a fluid passage gap between an outer surface of the shaft part and an inner surface of the run-through hole, said shaft part being arranged such that an insertion length of the shaft part into the run-through hole changes by a change of pressure caused by the movement or relative movement of the piston body, wherein the shaft part and the run-through hole form a throttle structure such that an amount of fluid passing through the fluid passage gap between the outer surface of the shaft part and the inner surface of the run-through hole changes by the insertion length of the shaft part, and the damping changes by the insertion length of the shaft part, and wherein the inner part includes a partitioning plate for partitioning, the cylinder body, and a pipe-shaped body having a part projecting in an axial direction from the partitioning plate facing toward the piston body and a part projecting in the axial direction from the partitioning plate toward the stopper body.