| 摘要 |
PROBLEM TO BE SOLVED: To provide a door which does not make a person feel that the door is heavy, when he/she opens the door, which can be housed in an underfloor portion and inside an upper wall of the door, and which does not deteriorate an aspect of the periphery of the door and which can be miniaturized.SOLUTION: Rotation of the door D is converted to movement of a piston Ps1 along a pivot O; the piston Ps1 is brought into contact with a piston Ps2 via a push spring U1 to push it; and the lower-speed piston Ps2 decelerates the higher-speed piston Ps1. The piston Ps2 is moved by urging means U2 different from the piston Ps1, without being affected by the piston Ps1, and an impact of the door D is absorbed by deformation of the push spring U1. |
