Seat Device

Abstract

A seat device has a bottom board and a top board mounted on the bottom board. The top board has two recesses defined thereon and adapted to partially hold the hip so that the seat device provides comforting and correcting efficiency.

1 . A seat device comprising a bottom board and a top board secured on the bottom board, where the improvement of the seat device is:
 two recesses defined on the top board and adapted to hold the hips.   
     
     
         2 . The seat device as claimed in  claim 1 , wherein the two recesses are selectively with round, oval or ellipse top cross-section. 
     
     
         3 . The seat device as claimed in  claim 1 , wherein the two recesses are arranged symmetrically to a central line of the seat device at a right side and a left side. 
     
     
         4 . The seat device as claimed in  claim 1 , wherein the bottom board has two meshed ventilating holes aligned below the two recesses respectively; each of the two meshed ventilating holes is performed by multiple arc slits in sections arranged concentrically. 
     
     
         5 . The seat device as claimed in  claim 1 , wherein the seat device is for chair seat. 
     
     
         6 . The seat device as claimed in  claim 1 , wherein the top board has bulged edges at right side, left side and rear side respectively. 
     
     
         7 . The seat device as claimed in  claim 1 , wherein the two recesses are tapered downward to perform concave structures.