| 摘要 |
A lifting mechanism for the bedspring or the bed-plane (20) of an articulated bed is presented. The bedspring or the bed-plane (20) is connected to a chassis (10) laid on the ground, and comprises (i) a first and a second lifting arm (30, 40) mounted substantially parallel to each other and hinged to the chassis and the bed-plane to form an articulated parallelogram, one of the two arms being extendable through two segments (42, 44) mounted telescopically into one another, and (ii) elastic means thrusting between the two segments to counter the weight of the bed-plane and to servo their lifting. The elastic means (50) are arranged inside one or both of said segments (42, 44).
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