Adjustable bed

1. A modular adjustable bed system, comprising:

a frame;

wherein the frame further comprises:

at least two self-contained modular self-supporting sections;

each of said self-contained modular self-supporting sections defining a shared respective flat continuous support plane relative to an external bed support surface;

a first of said self-contained modular self-supporting sections including a head end sub-assembly configured as an upper body supporting section on which an adjustable backrest support section is movably mounted within said head end sub-assembly between a flat continuous support position positioned aligned with said flat continuous support plane and a backrest support position;

said upper body support section further comprising an upper body fixed support section adjacent said backrest support section and fixably spanning respective sides of said first of said first of said self-contained modular self-supporting sections;

said upper body fixed support section positioned along said flat continuous support plane; and

a first upper body actuator means contained within said upper body supporting section providing an angular adjustment of said backrest support section during a use;

a second of said self-contained modular self-supporting sections including a separate toe end sub-assembly configured as a lower body supporting section on which at least one lower body support section is movably mounted within said toe end sub-assembly between said flat continuous support position aligned with said flat continuous support plane and a lower body support position;

said lower body supporting section further comprising a lower body fixed support section adjacent said lower body support section and fixably spanning respective sides of said second of said self-contained modular self-supporting sections;

said lower body fixed support section positioned along said flat continuous support plane;

a second lower body actuator means contained within said lower body supporting section providing an angular adjustment of said at least one lower body support section during said use; and

wherein said head end sub-assembly and said toe end sub-assembly being attachably and detachably joinable together so that upon an attachment during said use said backrest support section, said upper body fixed support section, said lower body support section and said lower body fixed support section are aligned with said flat continuous support plane.

2. The modular adjustable bed system, according to claim 1 , wherein:

said backrest support section has a hinged end; and

said upper body fixed support section adjacent said hinged end of said backrest support section.

3. The modular adjustable bed system, according to claim 1 , wherein:

said at least one lower body support section further comprising:

an adjustable upper leg/thigh support section and an adjustable lower leg/calf and foot support section.

4. The modular adjustable bed support system, according to claim 3 , wherein:

said adjustable upper leg/thigh support section is pivotally connected to said adjustable lower leg/calf and foot support section.

5. The modular adjustable bed support system, according to claim 4 , wherein:

said adjustable lower leg/calf and foot support section is arranged to pivot apart from said adjustable upper leg/thigh support section during an angular adjustment of said adjustable upper leg/thigh support section; and

said adjustable lower leg/calf support, further comprises:

an abutment stop that prevents a further angular adjustment of said lower leg/calf and foot support section with respect to said adjustable upper leg/thigh support section at a predetermined angle of adjustment relative to said adjustable upper leg/thigh support section.

6. The modular adjustable bed support system, according to claim 3 , wherein:

said upper leg/thigh support section further comprises a hinged end; and

said a lower body fixed support section adjacent said hinged end of said upper leg/thigh support section.

7. The modular adjustable bed support system, according to claim 1 , further comprising:

at least a first upper body bearing member on said upper body supporting section;

said at least first upper body bearing member projecting downward from said upper body support section below said shared respective flat continuous support plane;

said first upper body bearing member being supported by a first upper body bearing means arranged to run on a first upper body curved guide part thereof such that said adjustable backrest support section is pivotally mounted with respect to said frame about an upper body pivot axis defined by a center of curvature of said first upper body curved guide part;

at least a first lower body bearing member on said lower body supporting section;

said at least first lower body bearing member projecting downward from said lower body member below said shared respective flat continuous support plane; and

said first lower body bearing member being supported by a first lower body bearing means arranged to run on a first lower body curved guide part thereof such that said one lower body support section is pivotably mounted with respect to said frame about a lower body pivot axis defined by center of curvature of said first lower body curved guide part.

8. The modular adjustable bed support system, according to claim 7 , wherein:

at least one of said first upper body bearing means and said first lower body bearing means is carried by a respective one of said upper body bearing member and said lower body bearing member; and

at least one of said upper body curved guide and said lower body curved guide is proximate a slot in said frame.

9. The modular adjustable bed support system, according to claim 7 , wherein:

each of said first upper body bearing means and said first lower body bearing means carried by said frame;

said upper body curved guide provided on said upper body bearing member; and

said lower body curved guide provided on said lower body bearing member.

10. The modular adjustable bed support system, according to claim 7 , wherein:

each of said at least two self-contained modular self-supporting sections including at least a pair of side panels; and

each one of said upper body curved guide and said lower body curved guide on said at least one of respective said pairs of side panels.

11. The modular adjustable bed support system, according to claim 7 , wherein:

said at least first upper body bearing member, further comprises:

a second upper body curved guide part and a second upper body bearing means;

said first and said second upper body curved guide parts on respective opposed lateral sides of said upper body supporting section;

a first and said second upper body bearing means on respective opposed lateral sides of said frame;

said first and said second upper body curved guide parts being arranged to run on respective said first and said second upper body bearing means to permit an angular adjustment about said upper body pivot axis during said use; and

said at least first lower body bearing member, further comprises:

a second lower body curved guide part and a second lower body bearing means;

said first and said second lower body curved guide parts on respective opposed lateral sides of said lower body supporting section;

a first and said second lower body bearing means on respective opposed lateral sides of said frame; and

said first and said second lower body curved guide parts being arranged to run on respective said first and said second lower body bearing means to permit an angular adjustment about said lower body pivot axis during said use.

12. The modular adjustable bed support system, according to claim 1 , wherein:

said upper body support section and said lower body support section each contain a separate box type frame structure having a pair of lateral side panels enclosing a respective upper body support inner region and a lower body support inner region;

each said box type frame structure including an end panel joining respective lateral side panels;

said upper body fixed support section fixably joining respective said pair of said lateral side panels of said upper body support section; and

said lower body fixed support section fixably joining respective said pair of said lateral side panels of said lower body support section.