| 摘要 |
The back-rest (15) is connected to a support (6) mat is pivotally mounted on a carrier (1). The back-rest may alternatively be connected to the head-board (13) by sliding or rolling bearings. It is also connected to a mattress frame (3) mat folds at a joint (9). Conventional mechanical, electrical, hydraulic or electrohydraulic drive means may be used, such as a gas cylinder (16) actuable by a control (12) to move the mattress frame (3) towards the head-board (13). |
