Amusement system

Abstract

An amusement system for infants is provided which gives a player a special bodily sensation that cannot be experienced in daily life. The amusement system comprises: a main body ( 10 ) including a mattress ( 11 ) of a generally flat rectangular solid shape housed in a frame ( 13 ), and pressing means ( 17 ) for externally pressing the mattress ( 11 ); and an enclosure ( 20 ) surrounding the frame ( 13 ). The mattress ( 11 ) comprises a bag ( 12 ) formed of a transparent flexible urethane sheet, and a liquid component including differently colored water and oil filled in the bag ( 12 ). The pressing means ( 17 ) includes a driver ( 18 ) incorporating a hydraulic cylinder, and a press plate ( 19 ) connected to a piston rod of the hydraulic cylinder. The press plate ( 19 ) is pivoted by the operation of the hydraulic cylinder to press a side face of the mattress ( 11 ) from the outside toward the inside, whereby the upper surface of the mattress ( 11 ) is waved.

What is claimed is:  
     
         1 . An amusement system comprising a mattress provided on a floor of a playing space to allow a player to play thereon, the mattress comprising a bag of a flexible sheet and fluid liquid filled in the bag, wherein at least a top flexible sheet portion of the bag of the mattress is transparent.  
     
     
         2 . An amusement system as set forth in  claim 1 , wherein the liquid includes a plurality of types of liquids which are immiscible with each other and different in specific gravity.  
     
     
         3 . An amusement system as set forth in  claim 2 , wherein the plurality of types of liquids have different colors.  
     
     
         4 . An amusement system as set forth in  claim 1 , wherein the bag of the mattress is partitioned into a plurality of cells as viewed in plan, and the liquid is filled in the respective cells, wherein at least an adjacent pair of the cells respectively contain differently colored liquids.  
     
     
         5 . An amusement system comprising: an annular frame portion comprised of an air-filled tubular bag of a flexible sheet; and a mattress portion having upper and lower portions of a flexible sheet, and an inner space defined by the upper and lower portions and an inner circumference of the annular frame portion and filled with fluid liquid, whereby a player can play on the mattress portion.  
     
     
         6 . An amusement system as set forth in  claim 5 , wherein the frame portion comprises a plurality of annular air-filled tubular bags vertically connected to one another as projecting upward above the upper portion of the mattress portion.  
     
     
         7 . An amusement system as set forth in  claim 5 , wherein at least one of the upper and lower portions of the mattress portion comprises a plurality of annular air-filled tubular bags concentrically connected to one another.  
     
     
         8 . An amusement system as set forth in  claim 7 , wherein the frame portion comprises a plurality of annular air-filled tubular bags vertically connected to one another as projecting upward above the upper portion of the mattress portion.  
     
     
         9 . An amusement system as set forth in any of  claims 1  to  8 , further comprising pressing means for applying an external force to the liquid.