A construction assembly.

摘要

In an illustrative example of the invention a chair column comprises a gas spring (20). The gas spring (20) comprises a cylinder (22) and a piston rod (24). The cylinder (22) is axially guided in a guide tube (10) which is provided with a foot part (14). The piston rod (24) of the gas spring (20) is directed downwards. The gas spring (20) is adjustable in length and carries a seat member (38) at its upper end extending above the guide tube (10). The lower end portion of the piston rod (24) is connected to a bottom wall (16) of the guide tube (10). The lower end portion of the piston rod (24) passes through an opening (50) of the bottom wall (16). A support shoulder of the piston rod (14) is supported through a thrust ball bearing (48) on the bottom wall (16). The end portion of the piston rod (24) below the bottom wall (16) is provided with a peripheral groove (54). A securing element (60) is in engagement with the peripheral groove (54). This securing element (60) comprises a base plate (62) with radially extending spring tongues (64). The base plate (62) is adjacent to the bottom wall (16). The spring tongues (64) are bent radially inwards so that their free ends are positioned below the downwardly directed side of the base plate (62) and engage the peripheral groove (54).