Foldable bed framework structure

Abstract

A foldable bed framework structure includes two longitudinal rods, three transverse rods and a plurality of leg stands. Pivot holes are respectively defined on each of the longitudinal rods, and joint holes corresponding to the pivot holes are respectively defined on each of the transverse rods. Each of the transverse rods further has axial holes formed on at least two end portions thereof and passing through side walls thereof. The leg stands are disposed correspondingly to the axial holes. Each of the leg stands is defined as a U-shaped rod with an opening open on one side. Two ear plates with respective pivot apertures are formed on a top of each leg stand. The two ear plates are pivotally connected to the axial holes of the transverse rods. This foldable bed framework structure can be folded into a minimum size to facilitate the packing and the transportation thereof.

1 : A foldable bed framework structure comprising two longitudinal rods parallel to each other, three transverse rods parallel to one another and perpendicular to said longitudinal rods, and a plurality of leg stands disposed at a bottom of said transverse rods, each of said longitudinal rods forming respective pivot holes for connecting said three transverse rods, each of said transverse rods having joint holes penetrating from a top to a bottom thereof and disposed in alignment with said pivot holes respectively, each of said transverse rods having axial holes formed on at least two end portions thereof and passing through side walls thereof, said plurality of leg stands being disposed correspondingly to said axial holes of said transverse rods, each of said leg stands being a rod having a top and an opposite bottom and sides connected between the top and the bottom with one of the sides being open to define a U-shaped cross-section forming an opening, two ear plates with respective pivot apertures being disposed on the top each of said leg stands, said two ear plates being pivotally connected to said axial holes of said transverse rods;
 wherein said leg stands are rotatable with respect to said transverse rods through said ear plates being pivotally connected to said axial holes of said transverse rods between an expanded position where said leg stands are substantially perpendicular to said transverse rods and a collapsed position where the said leg stands substantially overlap said transverse rods by receiving said transverse rods in the openings defined by the U-shaped cross-sections of said leg stands.   
     
     
         2 : The foldable bed framework structure as claimed in  claim 1 , wherein each of said longitudinal rods includes a bottom plate and an upright plate connected to the bottom plate to define an L-shaped-cross-section, said pivot holes being defined on said bottom plate. 
     
     
         3 : The foldable bed framework structure as claimed in  claim 2 , wherein the L-shapes of said two longitudinal rods face each other, said upright plates of said two longitudinal rods are each provided with two pivot through holes to each connect an L-shaped bed head plate. 
     
     
         4 : The foldable bed framework structure as claimed in  claim 1 , wherein said pivot holes of said longitudinal rod include a first pivot hole and a second pivot hole defined at each end of each of said longitudinal rods, and a third pivot hole defined on a middle portion thereof, said three transverse rods including two outer transverse rods connected to an end portion of said longitudinal rods and an inner transverse rod connected to said middle portion of said two longitudinal rods, two ends of each of said two outer transverse rods forming said joint holes each corresponding to said first pivot hole, two ends of said inner transverse rod including said other joint holes each corresponding to said third pivot hole, a joint plate with a pivot orifice projecting outwards from a top end of one of said two ear plates of each leg stand which is pivotally connected to said two ends of said two outer transverse rods, said pivot orifice of said joint plate being corresponding to said second pivot hole of said longitudinal rod. 
     
     
         5 : The foldable bed framework structure as claimed in  claim 1 , wherein a distance is formed between said bottom of said transverse rods and a bottom of said two ear plates of said leg stands pivotally connected to said two ends of each of said outer transverse rods, such that when said leg stands pivotally connected to said two ends of said transverse rods are at the expanded position, the bottoms of said leg stands are inclined and diverge outward. 
     
     
         6 : The foldable bed framework structure as claimed in  claim 4 , wherein said joint plates disposed on two non-adjacent leg stands of said four leg stands each include a U-shaped mouth comprising an opening which extends from said pivot orifice to the outside. 
     
     
         7 : The foldable bed framework structure as claimed in  claim 5 , wherein said openings of said leg stands at said two ends of each of said transverse rods are oppositely disposed. 
     
     
         8 : The foldable bed framework structure as claimed in  claim 4 , wherein each of said longitudinal rods includes a bottom plate and an upright plate connected to the bottom plate to define an L-shaped-cross-section, said pivot holes being defined on said bottom plate. 
     
     
         9 : The foldable bed framework structure as claimed in  claim 8 , wherein the L-shapes of said two longitudinal rods face each other, said upright plates of said two longitudinal rods are each provided with two pivot through holes to each connect an L-shaped bed head plate. 
     
     
         10 : The foldable bed framework structure as claimed in  claim 4 , wherein said other joint hole of said inner transverse rod and said third pivot hole of said longitudinal rod are fastened with a screw and a wing nut, said second pivot hole of said longitudinal rod and said pivot orifice of said joint plate of said leg stand being fastened with another screw and another wing nut. 
     
     
         11 : The foldable bed framework structure as claimed in  claim 1 , wherein a sleeve is disposed on the bottom of each of said leg stands.