| 摘要 |
<p>The invention relates a chair back stand adjustable for height composed of a vertical fixed element (12), a moving element (13) which can be vertically moved on the fixed one and supports the back, and stop means (19) to clamp at different heights the moving element on the fixed one. Stop means is an oscillating lever installed on a supporting block (21) set on the fixed element and it is provided with a stop peg (23) which interacts with positioning notches (18) on the moving element and with a control push-button which contains recovery springs. <IMAGE></p> |
