| 摘要 |
<p>An office chair mechanism provided with a device for adjusting the swivel force, comprising a fixed part (2) secured to the chair base (6), movable parts (12, 8) secured to the seating portion (14) and to the back rest (22) of the chair, and elastic means (38) which oppose the weight of the chair user, said mechanism being characterised by further comprising: - a lever (28) having contact surfaces (32, 32') which interact with said fixed part (2) by means of a fulcrum consisting of a movable contact element (30) interposed between the end (36) acting on said elastic means (38) and the other end (26) to which said movable parts (12, 18) are pivoted, - adjustment means (34) which cause only the movable contact element (30) to move but without modifying the position of the elastic elements (38) and of the lever (28).</p> |
