Impact absorbing gymnastic mat

Abstract

In some preferred embodiments, an impact absorbing gymnastic mat 1 includes a mat body 10 having an air-tight space 14 therein, and an openable and closable air supply and discharge port 22 for supplying and discharging air into and from the air-tight space 14 of the mat body 10 . The air supply and discharge port 22 is provided at a prescribed portion of the mat body 1 . The mat body 1 includes a joined member 11 and an air impermeable external sheet 20 and 21 encasing the joined member 11 so as to form the air-tight space 14 . The joined member 11 includes a pair of internal sheets 12 a and 12 b opposed at a prescribed distance and a plurality of connecting threads 13 connecting opposed surfaces of the internal sheets 12 a and 12 b.

1 . An impact absorbing gymnastic mat, comprising: 
 a mat body having an air-tight space therein; and    an openable and closable air supply and discharge port for supplying and discharging air into and from the air-tight space of the mat body, the air supply and discharge port being provided at a prescribed portion of the mat body,    wherein the mat body includes a joined member and an air impermeable external sheet encasing the joined member so as form the air-tight space; and    wherein the joined member includes a pair of internal sheets opposed at a prescribed distance and a plurality of connecting threads connecting opposed surfaces of the internal sheets.    
   
   
       2 . The impact absorbing gymnastic mat as recited in  claim 1 , wherein the internal sheet is a woven fabric.  
   
   
       3 . The impact absorbing gymnastic mat as recited in  claim 2 , wherein the connecting thread is weaved into the fabric.  
   
   
       4 . The impact absorbing gymnastic mat as recited in  claim 1 , wherein a density of the connecting threads is 1 to 5 pieces/cm 2 .  
   
   
       5 . The impact absorbing gymnastic mat as recited in  claim 2 , wherein a density of the connecting threads is 1 to 5 pieces/cm 2 .  
   
   
       6 . The impact absorbing gymnastic mat as recited in  claim 3 , wherein a density of the connecting threads 1 to 5 pieces/cm 2 .  
   
   
       7 . The impact absorbing gymnastic mat as recited in  claim 1 , wherein the external sheet is made of urethane series resin.  
   
   
       8 . The impact absorbing gymnastic mat as recited in  claim 1 , wherein the external sheet is adhered to a surface of the mat body.  
   
   
       9 . The impact absorbing gymnastic mat as recited in  claim 2 , wherein the external sheet is adhered to a surface of the mat body.  
   
   
       10 . The impact absorbing gymnastic mat as recited in  claim 3 , wherein the external sheet is adhered to a surface of the mat body.  
   
   
       11 . The impact absorbing gymnastic mat as recited in  claim 4 , wherein the external sheet is adhered to a surface of the mat body.  
   
   
       12 . The impact absorbing gymnastic mat as recited in  claim 5 , wherein the external sheet is adhered to a surface of the mat body.  
   
   
       13 . The impact absorbing gymnastic mat as recited in  claim 6 , wherein the external sheet is adhered to a surface of the mat body.  
   
   
       14 . The impact absorbing gymnastic mat as recited in  claim 7 , wherein the external sheet is adhered to a surface of the mat body.  
   
   
       15 . The impact absorbing gymnastic mat as recited in  claim 8 , wherein the external sheet is adhered to a surface of the mat body via an auxiliary sheet.  
   
   
       16 . The impact absorbing gymnastic mat as recited in  claim 8 , wherein the external sheet is a raised sheet.  
   
   
       17 . An impact absorbing gymnastic mat, comprising: 
 a mat body having an air-tight space therein; and    an openable and closable air supply and discharge port for supplying and discharging air into and from the air-tight space of the mat body, the air supply and discharge port being provided at a prescribed portion of the mat body,    wherein the mat body includes a pair of opposed upper and lower sheets disposed at a prescribed distance, and a plurality of connecting members connecting opposed surfaces of the upper and lower sheets, and    wherein a density of the connecting members is 1 to 5 pieces/cm 2 .    
   
   
       18 . The impact absorbing gymnastic mat as recited in  claim 17 , wherein the upper and lower sheet are woven fabrics, and wherein the connecting threads are weaved into the fabrics.  
   
   
       19 . The impact absorbing gymnastic mat as recited in  claim 18 , further comprising an external raised sheet adhered to an upper surface of the main body.  
   
   
       20 . The impact absorbing gymnastic mat as recited in  claim 17 , wherein the density of the connecting threads is 2 to 3 pieces/cm 2 .