Mattress leg rest section for an articulatable bed convertible to a chair position

An articulated bed convertible to a chair position, said bed comprising a mattress formed of sections including a leg rest section, said mattress sections being secured to respective support frames, articulating linkage means to articulate said support frames, said mattress leg rest section being secured to a retractable support frame, means to support said support frames elevated from a floor surface, said leg rest section of said mattress having at least a compressible section thereof formed of compressible material, compressible interconnecting means to compress said compressible material to shorten the length of said compressible section, restraining means to restrain said compressible material as it is compressed and decompressed when said support frames are displaced from a horizontal position to an articulated chair position and vice versa, said compressible section is constituted by a high density soft foam piece material having an undulated surface section defining peaks and valleys formations dimensioned and positioned such that said compressible means can cause said peaks formations to be displaced closer to one another within said valleys formations to compress said soft foam piece, said compressible interconnecting means comprises a pair of rigid connecting members interconnected together by interconnecting telescoping means to cause guided displacement of a displaceable one of said rigid members relative to a stationary one of said rigid members, said displaceable one of said rigid members being connected to displacement means, said interconnecting telescoping means being constituted by at least a pair of telescoping interconnecting members secured between said rigid members, said telescoping interconnecting members being retained captive in said soft foam piece in a solid section of said foam niece under said undulated surface section.