| 摘要 |
<p>The backrest (1) has a lumbar support (5) arranged near a base and including an H-shaped frame (6) sliding in a vertical direction with respect to the backrest. The frame allows a surface of the backrest to define a curved appearance by a flexible elastically deformable material. The frame has a handle (8) for manually displacing the frame. Vertical bars of the frame slide with respect to vertical posts (3, 4). The frame is formed with a resilient material i.e. flexible foam.</p> |
