| 摘要 |
A supporting framework for a swivel chair or table includes a gas spring and a cylinder put on the gas spring. The cylinder includes two opposite holes and a plurality of equally circumferentially spaced longitudinal apertures. Spring loaded posts and lock bars are located in the apertures. A fastening ring rests upon the cylinder and includes a plurality of equally circumferentially spaced openings having a diameter less than a diameter of the posts but slightly larger than a diameter of the lock bars. A hollow cap with the gas spring projected therethrough includes two opposite channels of an inverted L-shape. Two, lock pins are inserted through the channels and the holes for fastening the cap and the cylinder together. Moving the lock pins from upper second positions to lower first positions in the channels will enable the gas spring to rotate or vice versa will lock the same.
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