| 摘要 |
Conventionally, fold-away beds include lift mechanisms either pneumatic or coil springs reacting between the rear of the bed frame and the base of the vertical support framework in order to act as counterbalances for raising and lowering the bed. This places considerable stress and strain upon the vertical frame which has to be anchored firmly to the wall or supporting surface and these anchors often become loose due to the strains imposed thereon. The present invention includes a relatively lightweight frame and bed unit pivoted by the rear thereof to adjacent the base of the frame. A pair of lift arms extend upwardly and rearwardly from the bed unit just forwardly of the pivot points and springs extend from the lift arms upwardly and rearwardly to be secured to the vertical frame sides intermediate the ends thereof. The leverage action provided is such that the vertical frame is easily secured to the wall or supporting structure as very little strain is placed thereon as the bed is raised and lowered. Furthermore, the lifting mechanism is simple and requires relatively lightweight components compared to conventional fold-away beds.
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