| 摘要 |
<p>A pivoting support for chairs, seats and the like comprises a main support member (8) which is connected to the base structure (3) of the chair and a seat support member (9) which is pivotably connected to the main support member (8) with the interposition of an auxiliary support member (10). The latter is articulated to the main support member (8) about a first horizontal axis (11) and to the seat support member about a second horizontal axis (12) parallel to and in front of the first horizontal axis (11). First resilient means (13) are interposed between the main support member and the seat support member for biassing the seat support member (9) towards a position in which it is rotated upwardly relative to the auxiliary support element (10). Second resilient means (14) are also interposed between the main support member (8) and the auxiliary support member (10) for biassing the auxiliary support member (10) towards a position in which it is rotated upwardly relative to the main support member (8). The user can pivot the seat backwards by downward rotation of the seat support element (9) relative to the auxiliary support element (10), overcoming the action of the first resilient means (13), or forwards by downward rotation of the auxiliary support member (10) relative to the main support member (8), overcoming the action of the first and second resilient means (13, 14).</p> |
