Inflatable bed

Abstract

An inflatable pad is provided including a top piece and a bottom piece comprising an outer periphery welded to an outer periphery of the top piece, thereby defining an inflatable chamber between the top piece and the bottom piece. The inflatable pad further includes a plurality of welding points at which the top piece and the bottom piece are welded to each other and a plurality of welding lines along which the top piece and the bottom piece are welded to each other. One of the plurality of welding points is disposed as predetermined distance from each end of each of the plurality of welding lines.

What is claimed is: 
     
         1 . An inflatable pad, comprising:
 a top piece;   a bottom piece comprising an outer periphery welded to an outer periphery of the top piece, thereby defining an inflatable chamber between the top piece and the bottom piece;   a plurality of welding points at which the top piece is welded to the bottom piece; and   a plurality of welding lines along which the top piece is welded to the bottom piece;   wherein one of the plurality of welding points is disposed a predetermined distance from each end of each of the plurality of welding lines.   
     
     
         2 . The inflatable pad according to  claim 1 , wherein the one of the plurality of welding points disposed a predetermined distance from each end of each of the plurality of welding lines is disposed on an extension line of a corresponding welding line. 
     
     
         3 . The inflatable pad according to  claim 1 , wherein a diameter of each of the plurality of welding points is greater than a width of each of the plurality of welding lines. 
     
     
         4 . The inflatable pad according to  claim 1 , wherein the predetermined distance is less than or equal to 3 cm. 
     
     
         5 . The inflatable pad according to  claim 1 , wherein the predetermined distance is less than or equal to 5 mm. 
     
     
         6 . The inflatable pad according to  claim 1 , wherein each of the plurality of welding points has a ring shape. 
     
     
         7 . The inflatable pad according to  claim 1 , wherein the inflatable pad comprises a central region, a first edge region disposed at a first side of the central region in the width direction, and a second edge region disposed at a second side of the central region in the width direction, wherein each of the first edge region and the second edge region comprises a plurality of parallel welding lines. 
     
     
         8 . The inflatable pad according to  claim 7 , where the central region comprise a plurality of welding points arranged in a matrix. 
     
     
         9 . The inflatable pad according to  claim 8 , wherein the plurality of welding lines and the plurality of welding points is arranged such that there is an equal spacing between adjacent ones of the plurality of welding lines, and/or there is an equal spacing between adjacent rows of the plurality of welding points. 
     
     
         10 . The inflatable pad according to  claim 1 , wherein each of the top piece and the bottom piece is made of thermoplastic polyurethane elastomer. 
     
     
         11 . The inflatable pad according to  claim 1 , further comprising a thermal insulation layer disposed between the top piece and the bottom piece.