| 摘要 |
A bed assembly (10) having a generally rectangular frame (22) and a mattress support (62, 64, 66, 68), the mattress support including a hinged head section (14) movable between raised and lowered positions, and an extender (76) supported by the hinged head section for extensible and retractable movement, the extender bridging the space between a headboard assembly (18) and the hinged head section when the hinged head section is in a raised position. An extender operating assembly (112) is provided for causing the extender to be extended towards the headboard assembly when the hinged head section is raised and for causing the extender to retract when the hinged head section is lowered. The extender operating assembly includes a sheave assembly preferably in the form of a pulley block (114) carried by the hinged head section, and a cord (116) having spaced apart ends and an intermediate section, the intermediate section (116.1) of the cord passing over the pulley block, one end (116.2) of the cord being secured to the frame, and the other end 116.3) being secured to the extender, the pulley block and cord being so arranged so that as the hinged head section is raised the extender will be caused to be extended. The extender operating means also includes a retractor in the form of a spring (122) to cause the extender to be retracted when the hinged head section is lowered. The bed assembly is also provided with a pair of stops (104, 108) to limit the maximum desired raised position of the pivoted head section.
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