| 摘要 |
The articulated bed is comprised of a tubular frame (10), of a mattress in three parts: a back (11), a seat (12) and a leg rest (13), of a cradle (14) having the shape of an arc of a circle, welded to the frame (10), of a carriage (15) capable of running on the cradle (14), and of a compressed air jack (16) exerting an action on the carriage (15). Due to the combined actions of the weight of the carriage (15) and the jack (16) the mattress is substantially in a neutral balance state in all the relative positions that the back (11) and the seat (12) may take. |
