Seat structure of tourist coach

Abstract

A seat comprises a cushion, a pair of backrests, a pair of bolsters, and a pair of armrest pads. The cushion has a width of double seat. Both the bolster and the backrest have a width of single seat. A front face of the bolster has a concave arc portion, and a back face thereof has a slanting arc portion. The bolsters can be turned 180 degrees. A fixing device joins the bolster and the backrest. A joining device is disposed at the adjoining position of the two backrests. An armrest is joined at each side of the cushion. A pad is joined on the armrest to form the armrest pad. The pad and the armrest are joined by a turn control device so that the pad can be turned 90 degrees, hence facilitating use of a single seat. A double seat is obtained by restoring the armrest pads.

I claim:  
     
         1 . An improved seat structure of a tourist coach, comprising: 
 a cushion having a width of double seat;    a pair of backrests perpendicularly joined with a rear end of said cushion;    said backrest having a width of single seat;    a pair of bolsters having a width of single seat, said bolster having a front face and a back face as wide faces, said bolsters being joined on said backrests, said front face having a concave arc portion, said back face having a slanting arc portion tilting toward the adjacent bolster, said front face facing forwards when said cushion is used for a double seat, said back face facing forwards when said cushion is used for a single seat; and    a pair of armrest pads having a pair of armrests and a pair of pads, said armrests being joined at two sides of said cushion, said pads being joined on said armrests, said pads having narrow face portions and wide face portions, said pads being capable of turning, said narrow face portions facing upwards when said cushion is used for a double seat, said wide face portions facing upwards when said cushion is used for a single seat.    
     
     
         2 . The improved seat structure of a tourist coach as claimed in  claim 1 , wherein a fixing device is disposed between said backrest and said bolster, said fixing device comprising an insertion pole, a bushing, and a press fastener, said insertion pole being joined on a bottom face of said bolster, said bushing being joined in said backrest, said insertion pole being inserted into said bushing and then positioned by said press fastener.  
     
     
         3 . The improved seat structure of a tourist coach as claimed in  claim 2 , wherein said press fastener is disposed at a top end of said bushing, and has an inner ring and an outer ring, said inner ring having a press head, said outer ring having a through hole, said press head protruding out of said through hole, a small resilient part being disposed between said inner ring and said outer ring, said insertion pole having at least an annular groove, said inner ring being used to lock said annular groove of said insertion pole, said annular groove of said insertion pole being used to adjust the height of said insertion pole.  
     
     
         4 . The improved seat structure of a tourist coach as claimed in  claim 2 , wherein a miniature portion is disposed at a lower end of said insertion pole, and a main resilient part is joined between said miniature portion and an inner bottom face of said bushing.  
     
     
         5 . The improved seat structure of a tourist coach as claimed in  claim 1 , wherein a joining device is disposed between said two backrests to join said two backrests together so that they can be turned over simultaneously.  
     
     
         6 . The improved seat structure of a tourist coach as claimed in  claim 5 , wherein said joining device is an inversely U-shaped fastener inserted into said two backrests.  
     
     
         7 . The improved seat structure of a tourist coach as claimed in  claim 1 , wherein a turn control device is disposed in said armrest pad so that said pad can be turned within the range of 90 degrees.  
     
     
         8 . The improved seat structure of a tourist coach as claimed in  claim 7 , wherein said turn control device comprises an inner bushing and an outer bushing, said inner bushing being joined with said armrest, said outer bushing being joined with said pad, said outer bushing being sleeved onto said inner bushing, said inner bushing joining an annular sleeve outside, said annular sleeve having an embedding portion, said outer bushing having a sleeving portion, said sleeving portion and said embedding portion being joined and positioned, a resilient part in said inner bushing being used to join said outer bushing.