Chair Seat Device

Abstract

A chair seat device includes a lower seat and an upper seat softer than the lower seat and permitting restitution when compressed. The upper seat includes a top board having front and rear lower edges coupled with front and rear lower edges of the lower seat. Two openings are formed in left and right sides of the coupled upper and lower seats. At least one elastic element is coupled to the lower seat and includes an upper supporting portion shorter than the upper seat. The upper supporting portion includes front and rear arcuate portions having front and rear end portions coupled with the lower seat. The front arcuate portion is spaced from the front upper edge by a front spacing. The rear arcuate portion is spaced from the rear upper edge by a rear spacing. The front and rear spacings permit elastic deformation of the at least one elastic element.

1 . A chair seat device comprising:
 a lower seat made of a rigid material, wherein the lower seat includes a bottom board having a front upper edge and a rear upper edge spaced from the front upper edge in a longitudinal direction, wherein the bottom board further includes at least one front coupling portion and at least one rear coupling portion;   an upper seat made of a material softer than the rigid material of the lower seat, wherein the upper seat is configured to permit restitution when compressed, wherein the upper seat includes a top board having a front lower edge and a rear lower edge spaced from the front lower edge in the longitudinal direction, wherein the front upper edge of the lower seat is coupled with the front lower edge of the upper seat, wherein the rear upper edge of the lower seat is coupled with the rear lower edge of the upper seat, and wherein two openings are formed in left and right sides of the coupled upper and lower seats and spaced from each other in a horizontal direction perpendicular to the longitudinal direction; and   at least one elastic element coupled to the lower seat and including an upper supporting portion having a length in the longitudinal direction smaller than a length of the upper seat in the longitudinal direction, wherein the upper supporting portion includes a front end having a front arcuate portion extending downwards and a rear end having a rear arcuate portion extending downwards, wherein the front arcuate portion includes a bottom section having a front end portion coupled with the at least one front coupling portion of the lower seat, wherein the rear arcuate portion includes a bottom section having a rear end portion coupled with the at least one rear coupling portion of the lower seat, wherein the front arcuate portion is spaced from the front upper edge by a front spacing, wherein the rear arcuate portion is spaced from the rear upper edge by a rear spacing, and wherein the front and rear spacings permit elastic deformation of the at least one elastic element.   
     
     
         2 . The chair seat device as claimed in  claim 1 , wherein each of the front upper edge, the rear upper edge, the front lower edge, and the rear lower edge includes a plurality of coupling holes, and wherein a plurality of fasteners extends through the plurality of coupling holes. 
     
     
         3 . The chair seat device as claimed in  claim 1 , wherein the at least one front coupling portion of the lower seat includes a front coupling groove coupled with the front end portion of the at least one elastic element, and wherein the at least one rear coupling portion of the lower seat includes a rear coupling groove coupled with the rear end portion of the at least one elastic element. 
     
     
         4 . The chair seat device as claimed in  claim 1 , wherein the top board of the upper seat includes at least one fence portion extending downwards therefrom and located corresponding to the at least one front coupling portion and the at least one rear coupling portion of the lower seat, wherein the at least one fence portion includes two fences extending in the longitudinal direction, wherein a separation portion is disposed between the two fences, and wherein each of the two fences includes a plurality of slits permitting the top board to be pressed. 
     
     
         5 . The chair seat device as claimed in  claim 1 , wherein the top board includes a plurality of vents. 
     
     
         6 . The chair seat device as claimed in  claim 1 , wherein the at least one elastic element is made of metal. 
     
     
         7 . The chair seat device as claimed in  claim 1 , wherein the at least one elastic element is a metal wire having a plurality of bends.