Folding bed frame

Abstract

A folding bed frame includes four vertical faces: two ends and two sides. Each face is formed by two slanting bars that are cross hinged together. The upper and lower ends of adjacent slanting bar sets are hinged together to form the whole frame structure. The two vertical faces are corresponding or symmetric, and each includes two sets of slanting bar sets that are hinged through to middle sections of the upper and lower angle plates. There is a vertical rod part on the cross-hinging point of each set of slanting bar set, and its movable position is set by a slide bushing. There is a barrier that is on the cross-hinging point of one of the slanting bars. The barrier can contact the upper part vertical bar, and form two support points with the slide bushing for the vertical bar part.

1 . A folding bed frame comprising:
 four vertical faces: two ends and two sides;   each face is formed by two slanting bars that are cross hinged together;   the upper and lower ends of adjacent slanting bar sets are hinged together to form the whole frame structure;   the two vertical faces are corresponding or symmetric, and each includes two sets of slanting bar sets that are hinged through to middle sections of the upper and lower angle plates;   a vertical rod part on the cross hinging point of each set of slanting bar set, and its movable position is set by a slide bushing;   between the two crossed slanting bars, the bar that is close to the vertical bar is the primary slanting bar, and the bar that is far from the vertical bar is the secondary slanting bar;   the upper end of the aforementioned vertical bar part is connected to a connection plate;   a horizontal bar is hinged to each of the two horizontal directions of the connection plate;   the other end of each horizontal bar is hinged to the upper angle plate of the vertical face of the same side;   a barrier that is fixed on the cross hinging point of the primary slanting bar;   the barrier can contact the upper part aforementioned vertical bar, and form two support points with the aforementioned slide bushing for the vertical bar part.   
     
     
         2 . The folding bed frame of  claim 1 , wherein
 the barrier forms an inverse L-shaped or U-shaped structure;   the two ends are riveted on the surface of the primary slanting bar;   an upward arch can contact the upper part of the vertical bar.   
     
     
         3 . The folding bed frame of claim, wherein
 one side of the barrier contacts the upper part of the vertical bar part, while the other side contacts the secondary slanting bar;   the lower part facing the secondary slanting bar has a thickened step section, and when the frame is in open position, the step section can support the lower side of the secondary slanting bar.   
     
     
         4 . The folding bed frame of  claim 3 , wherein
 is the barrier is molded with plastic;   the thickness direction has reinforcing ribs, and the length direction has embedded metal bars;   the length of the aforementioned metal bars crosses over the vertical bar part and the secondary bar.   
     
     
         5 . The folding bed frame of  claim 4 , wherein
 the cross section of the barrier is a rectangular “U shaped with the opening facing downward;   and wherein the metal bars are embedded through the opening and are riveted by two rivets on the barrier step section to form a thickened section facing downwardly.