TO REALIZE A SEAMLESS STRUCTURE OF

TO REALIZE A SEAMLESS STRUCTURE OF A CUSHION FOR THE RECLINING BED BY REMOVING DISPLACEMENT AND GAP BETWEEN CUSHIONS WHILE REDUCING WEIGHT OF THE SAME. [MEANS TO SOLVE THE PROBLEM) A CUSHION 1 FOR A RECLINING BED HAVING A CUBIC NET STRUCTURE 5 HAVING A SPRING FUNCTION MADE OF CONTINUOUS TUBES IN SPIRAL FORM BY EXTRUSION MOLDING USING A THERMOPLASTIC RESIN AS A SOURCE MATERIAL OR ESSENTIAL MATERIAL IN DISORDERLY ENTANGLED EACH OTHER AND PARTIALLY HEAT-BONDED, THE CUBIC NET STRUCTURE HAS A PLURALITY OF CONTINUOUS GROOVES 1A FORMED EDGE TO EDGE ACROSS HORIZONTAL DIRECTION TO SEPARATE FROM THE BOTTOM SURFACE TOWARD THE UPPER SURFACE OF SAID CUBIC NET STRUCTURE. THE PLURALITY OF GROOVES 1A EXPAND WHEN PART OF SAID CUBIC NET STRUCTURE IS LIFTED IN UPWARD DIRECTION. THE CONTINUOUS GROOVES 1A HAVE A LINEAR-SHAPE FROM SIDE VIEW, ENDS OF THE TUBES AT THE SIDE-WALLS OF THE CONTINUOUS GROOVES ARE WELDED, DEPTH OF THE CONTINUOUS GROOVES IS DEFINED AS 50-90% OF THE HEIGHT OF THE CUBIC NET STRUCTURE, WIDTH W OF THE GROOVES 1A IS DEFINED AS 1MM 5MM IN LONGITUDINAL DIRECTION, WHICH CORRESPOND TO 0.6 1 6.7% OF THE CUBIC NET STRUCTURE HAVING HEIGHT H HAS 30MM 150MM.