| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas spring capable of preventing entry of foreign objects.SOLUTION: A gas spring 100 generates a restoring force against an external force applied in a tensile direction and includes: a piston rod 30 which is connected with a piston 20 and protrudes from a tip of a cylinder 10 to be connected with the other side; a bracket 50 which connects a base end of the cylinder 10 with the other side; a gas chamber 11 filled with a high pressure gas; an atmospheric chamber 12 which is defined by the cylinder 10, the piston 20, and the bracket 50; a ventilation passage 60 which is formed in the bracket 50 and allows the atmospheric chamber 12 and the exterior side of the bracket 50 to communicate with each other; and a filter 70 which is disposed in the ventilation passage 60 and filters air flowing into the atmospheric chamber 12. |
