CYLINDER-SHAPED DAMPER STRUCTURE HAVING DOUBLE-SPACE FOR SMOOTH CONTRACTION AND EXPANSION FOR MAKING COMPRESSIVE FLUID RESPONSE QUICKLY FOR EXTERNAL FORCE

摘要

PURPOSE: A cylinder-shaped damper structure having a double-space for smooth contraction and expansion is provided to perform compression and expansion without excessive power and to secure a natural operation for sudden compression and expansion without noise by compensating the pressure of a first inner space by compressive fluid filled in an outer space and a second inner space. CONSTITUTION: A cylinder-shaped damper structure expanded longitudinally with holding a door in opening and closing the door is composed of a cylinder(20) having an inner space(23) filled with compressive fluid and an outer space(24) separated from the inner space by a partition(26) to cover the inner space and upper and lower pistons(22) installed at the predetermined interval to a piston rod(21) moving in the inner space of the cylinder. The inner space inside the cylinder comprises a first inner space(23a) formed between the cylinder and the upper piston and a second inner space(23b) formed between the upper and lower pistons. The compressive fluid filled in the cylinder and compressed or expanded in moving the piston moves in the first and second inner spaces and the outer space by pressure difference.