| 摘要 |
<p>A gas spring 20 having a piston 23 slidably disposed within a cylinder 21 sealed with air 25, with one end of the cylinder closed, having a rod 22 fixed to the piston 23, with the cylinder inside divided by the piston into a rod-side chamber 28B and a piston-side chamber 28A, having cylinder grooves 29 extending in a axial direction of the cylinder formed on the inner periphery of the cylinder so that an extension side damping force is generated in an extension process in the cylinder grooves, and having one of the cylinder and the rod fitted to a vehicle body with the other fitted to a rear door pivotally provided in the body, wherein the cylinder grooves are formed in both-side movable areas X and Z excluding a locking area Y in a stroke area of the piston, and a flow path 35 for enabling air to flow from the piston-side chamber to only the rod-side chamber is formed in the piston. <IMAGE></p> |
