Inflatable pad

Abstract

The present application discloses an inflatable pad, the pad including a sponge comprising: a base extending in the length direction of the sponge and comprising a first side and a second side in the thickness direction of the sponge; a plurality of first protrusions arranged at intervals on the first side of the base, two adjacent of the plurality of first protrusions defining a first groove, and the plurality of first protrusions affixed to with a first wall of the pad; and a plurality of second protrusions arranged at intervals on the second side of the base, two adjacent of the plurality of second protrusions defining a second groove, wherein one of the first grooves is aligned with one of the plurality of second protrusions in the thickness direction of the sponge. The present embodiments reduce the waste of sponge, simplify the cutting process and improve the cutting efficiency.

What is claimed is: 
     
         1 . An inflatable pad, comprising:
 a first wall;   a second wall arranged opposite the first wall and defining a first inflatable chamber with the first wall; and   at least a first sponge having a length direction (Y), a width direction (X) and a thickness direction (Z) and arranged in said first inflatable chamber, said at least first sponge comprising:
 a base extending in the length direction (Y) of the first sponge and comprising a first side and a second side in the thickness, direction (Z) of the first sponge; 
 a plurality of first protrusions arranged at intervals on the first side of the base, two adjacent of the plurality of first protrusions defining a first groove, and the plurality of first protrusions affixed to the first wall; and 
 a plurality of second protrusions arranged at intervals on the second side of the base, two adjacent of the plurality of second protrusions defining a second groove; 
 wherein one of the first grooves is aligned with one of the plurality of second protrusions in the thickness direction (Z) of the first sponge, and one of the second grooves is aligned with one of the plurality of first protrusions in the thickness direction (Z) of the first sponge. 
   
     
     
         2 . The inflatable pad according to  claim 1 , wherein the plurality of second protrusions is affixed to the second wall. 
     
     
         3 . The inflatable pad according to  claim 1 , wherein:
 the inflatable pad further comprises a side wall arranged between the first wall and the second wall and surrounding the first sponge; and   the first wall, the second wall and the side wall jointly define said first inflatable chamber.   
     
     
         4 . The inflatable pad according to  claim 1 , wherein:
 the cross-section of the one of the first grooves perpendicular to the width direction (X) of the first sponge is the same as the cross-section, perpendicular to the width direction (X) of the first sponge, of the second protrusion aligned with the one of the first grooves in the thickness direction (Z) of the first sponge; and   the cross-section of the one of the second groove perpendicular to the width direction (X) of the first sponge is the same as the cross-section, perpendicular to the width direction (X) of the first sponge, of the first protrusion aligned with the one of the second grooves in the thickness direction (Z) of the first sponge.   
     
     
         5 . The inflatable pad according to  claim 1 , wherein the thickness of the first protrusion and/or of the second protrusions ranges from 1 cm to 7 cm. 
     
     
         6 . The inflatable pad according to  claim 1 , wherein the width of the first groove and/or of the second grooves ranges from 0.5 cm to 8 cm. 
     
     
         7 . The inflatable pad according to  claim 1 , wherein a ratio of the width of the first groove or of the second groove to the depth respectively of the first groove or of the second groove ranges from 0.2 to 5. 
     
     
         8 . The inflatable pad according to  claim 1 , wherein a ratio of the thickness of the base of the first sponge to the total thickness of the first sponge ranges from 0.07 to 0.87. 
     
     
         9 . The inflatable pad according to  claim 1 , wherein all of the plurality of first protrusions have the same cross-section perpendicular to the width direction (X) of the first sponge, and all of the plurality of second protrusions have the same cross-section perpendicular to the width direction (X) of the first sponge. 
     
     
         10 . The inflatable pad according to  claim 9 , wherein the cross-section of the first protrusions perpendicular to the width direction (X) of the first sponge is the same as the cross-section of the second protrusions perpendicular to the width direction (X) of the first sponge. 
     
     
         11 . The inflatable pad according to  claim 1 , wherein at least one of the plurality of first grooves and/or at least one of the plurality of second grooves is provided with a heat insulation sheet at a respective bottom. 
     
     
         12 . The inflatable pad according to  claim 11 , wherein a plurality of first and/or second heat insulation sheets are provided at the bottom of each first and/or second groove, said plurality of first and/or second heat insulation sheets being formed integrally or arranged independently. 
     
     
         13 . The inflatable pad according to  claim 12 , wherein, when the first and/or second heat insulation sheets are formed integrally, and wherein:
 the first heat insulation sheet presents first openings formed throughout the first heat insulation sheet, each of said first openings corresponding to each first protrusions; and   the second heat insulation sheets presents second openings formed throughout the second insulation sheet, each of said second openings corresponding to each second protrusions.   
     
     
         14 . The inflatable pad according to  claim 1 , further comprising:
 a second sponge having a length direction (Y), a width direction (X) and a thickness direction (Z) and arranged in the first inflatable chamber, the second sponge comprising:
 a base extending in the length direction (Y) of the second sponge and comprising a first side and a second side in the thickness direction (Z) of the second sponge; 
 a plurality of first protrusions arranged at intervals on the first side of the base, two adjacent of the plurality of first protrusions defining a first groove; and 
 a plurality of second protrusions arranged at intervals on the second side of the base, two adjacent of the plurality of second protrusions defining a second groove, and the plurality of second protrusions fitting with the second wall; 
 wherein:
 one of the first grooves is aligned with one of the plurality of second protrusions in the thickness direction (Z) of the second sponge, and one of the second grooves is aligned with one of the plurality of first protrusions in the thickness direction (Z) of the second sponge; and 
 the second protrusions of the first sponge engage with the first grooves of the second sponge, and the second groove of the first sponge engage with the first protrusions of the second sponge. 
 
   
     
     
         15 . The inflatable pad according to  claim 14 , further comprising a heat insulation sheet provided between the first sponge and the second sponge. 
     
     
         16 . The inflatable pad according to  claim 14 , wherein the plurality of second protrusions of the second sponge is affixed to the second wall. 
     
     
         17 . The inflatable pad according to  claim 1  further comprising:
 a third wall arranged opposite the second wall, so that the second wall is arranged between the first wall and the third wall, 
 a surrounding wall arranged between the third wall and the second wall; 
 wherein the third wall, the second wall and the surrounding wall jointly define a second inflatable chamber, the first inflatable chamber and the second inflatable chamber being independent of each other. 
 
     
     
         18 . The inflatable pad according to  claim 1 , wherein the indentation force deflection of the sponge ranges from 55 N to 100 N for 25% IFD, ranges from 80 N to 120 N for 40% IFD, and ranges from 190 N to 230 N for 65% IFD. 
     
     
         19 . The inflatable pad according to  claim 1 , wherein the thermal resistance of the sponge is selected from one of the following ranges: 
       
         
           
             
               
                 4 
                 ⁢ 
                     
                 
                   
                     ft 
                     2 
                   
                   · 
                   °F 
                   · 
                   h 
                 
                 / 
                 Btu 
                 ⁢ 
                     
                 to 
                 ⁢ 
                     
                 12 
                 ⁢ 
                     
                 
                   
                     ft 
                     2 
                   
                   · 
                   °F 
                   · 
                   h 
                 
                 / 
                 Btu 
               
               ; 
               and 
             
           
         
         
           
             
               2 
               ⁢ 
                   
               
                 
                   ft 
                   2 
                 
                 · 
                 °F 
                 · 
                 h 
               
               / 
               Btu 
               ⁢ 
                   
               to 
               ⁢ 
                  
               20 
               ⁢ 
                   
               
                 
                   ft 
                   2 
                 
                 · 
                 °F 
                 · 
                 h 
               
               / 
               
                 Btu 
                 . 
               
             
           
         
       
     
     
         20 . The inflatable pad according to  claim 1 , wherein a ratio of the indentation force deflection of the sponge for 65% IFD to that for 25% IFD is greater than or equal to 2.0.