| 摘要 |
The unit comprises an elastic element (2) positioned between the seat frame (1), which can be adjusted in height with a pneumatically operated cylinder, and the frame of the backrest (5) rotary joined the seat frame (1). A movable joint is connected to the seat frame (1) with a vertical shaft. A swing element is joined with a horizontal shaft to the joint, holding the operating lever (14) acting on the horizontal as well as on the vertical shaft. |
