| 摘要 |
The present invention relates to a device for a chair comprising an undercarriage (10) with a support unit (20) for a chair seat (30) and a backrest (40), the chair seat being pivotally connected to the support unit about a first pivot axis (1), and the backrest being pivotally connected to the chair seat, wherein the backrest (40) is split horizontally into at least an upper back part (41) and a lower back part (42) pivotally connected to each other about a second pivot axis (2); a pulling element (50) is pivotally connected to the support unit (20) about a third pivot axis (3) positioned behind the first pivot axis (1), and pivotally connected to the chair's upper back part (41) about a fourth pivot axis (4); the chair seat is pivotally connected to the pulling element about a fifth pivot axis (5) positioned behind the first pivot axis (1) and the third pivot axis (3); and at least one of the first, third or fifth pivot axes (1, 3, 5) is displaceable relative to at least one of the parts pivoting about said pivot axes.
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