Seat core of child-care instrument

Abstract

A seat core continuously comprises a backrest surface portion supporting a back of a child from behind, a seating surface portion supporting buttocks of the child from beneath, a leg-supporting surface portion supporting legs of the child in a state of bed, a first hinge portion positioned between the backrest surface portion and the seating surface portion, and a second hinge portion positioned between the seating surface portion and the leg-supporting surface portion.

What is claimed is:  
     
         1 . A seat core of a child-care instrument provided separately from a body of the child-care instrument and mounted on the child-care instrument which can be switched between a state of chair and a state of bed, to form a seat, continuously comprising: 
 a backrest surface portion supporting a back of a child from behind;    a seating surface portion supporting buttocks of the child from beneath;    a leg-supporting surface portion supporting legs of the child from beneath in said state of bed;    a first hinge portion positioned between said backrest surface portion and said seating surface portion in order to enable a slanting operation of said backrest surface portion; and    a second hinge portion positioned between said seating surface portion and said leg-supporting surface portion in order to enable said leg-supporting surface portion to be bent from said seating surface portion.    
     
     
         2 . The seat core of a child-care instrument according to  claim 1 , wherein said backrest surface portion, said seating surface portion, said leg-supporting surface portion, said first hinge portion and said second hinge portion are integrally formed of a common member.  
     
     
         3 . The seat core of a child-care instrument according to  claim 2 , wherein said first and second hinge portions are formed by reducing thicknesses of the relevant cores.  
     
     
         4 . The seat core of a child-care instrument according to  claim 1 , wherein said first hinge portion includes a first hinge tape attached onto an abutting portion between said backrest surface portion and said seating surface portion, and said second hinge portion includes a second hinge tape attached onto an abutting portion between said seating surface portion and said leg-supporting surface portion.  
     
     
         5 . The seat core of a child-care instrument according to  claim 1 , continuously comprising: 
 a head guard surface portion rising from an upper edge of said backrest surface portion in said state of bed; and    a third hinge portion positioned between said backrest surface portion and said head guard surface portion in order to enable a rising operation of said head guard surface portion.    
     
     
         6 . The seat core of a child-care instrument according to  claim 1 , continuously comprising: 
 a pair of upper side surface portions rising from both side edges of said backrest surface portion in said state of bed; and    a fourth hinge portion positioned between said backrest surface portion and said each upper side surface portion in order to enable a rising operation of said upper side surface portion.    
     
     
         7 . The seat core of a child-care instrument according to  claim 1 , wherein said seating surface portion continuously comprises: 
 a center seating surface portion;    a pair of side seating surface portions connected to both side edges of said center seating surface portion; and    a fifth hinge portion positioned between said center seating surface portion and said each side seating surface portion, in order to enable a bending operation of said each side seating surface portion from said center seating surface portion.    
     
     
         8 . The seat core of a child-care instrument according to  claim 1 , wherein said leg-supporting surface portion continuously comprises: 
 a center leg-supporting surface portion;    a pair of side leg-supporting surface portions connected to both side edges of said center leg-supporting surface portion; and    a sixth hinge portion positioned between said center leg-supporting surface portion and said each side leg-supporting surface portion, in order to enable a bending operation of said each side leg-supporting surface portion from said center leg-supporting surface portion.    
     
     
         9 . The seat core of a child-care instrument according to  claim 1 , wherein the relevant seat core is mounted on a baby carriage.  
     
     
         10 . The seat core of a child-care instrument according to  claim 9 , wherein the relevant seat core is put in a seat hammock of the baby carriage.