Chair

Abstract

A seat that consists of a single-component body ( 1 ) includes an essentially horizontally arranged seat element ( 11 ), an upwardly projecting backrest ( 12 ) applied to the rear of the seat element ( 11 ), and two front legs ( 10,10′ ) extending at the front of the seat (11). The two separated rear legs ( 2 ′) are to be inserted and fixed in the body ( 1 ), the legs being provided with a non-rotationally symmetrical insertion part ( 22 ′). An externally accessible opening for positively inserting the insertion parts ( 22′ ) is provided on the body ( 1 ). The insertion parts ( 22 ′) and openings are provided with an enlarged surface in relation to the core diameters thereof. The insertion part ( 22 ′) is embodied as an insertion tenon ( 22 ′) extending from the rear leg ( 2 ′) and having an essentially elliptical cross-section which conically tapers off in the direction of the free end.

1 . A chair comprising:
 a) a single-part body ( 1 ) comprising:   aa) a seat ( 11 ) arranged horizontally;   ab) an upwardly projecting backrest ( 12 ) extending from the seat ( 11 ) at the rear;   ac) front legs ( 10 , 10 ′) extending from the seat ( 11 ) to the floor at the front; and   b) rear legs ( 2 , 2 ′) which are plugged into the body ( 1 ) and extend to the floor, wherein   c) each rear leg ( 2 , 2 ′) is present as a separate component and is provided with a plug-in part ( 22 , 22 ′) which is not rotationally symmetrical;   d) an externally accessible opening ( 141 ) into which the plug-in parts ( 22 , 22 ′) can be plugged in a form-fitting manner is present on a lateral portion of the body ( 1 ) in the region of the rear seat end ( 110 ); and   e) the plug-in parts ( 22 , 22 ′) and openings ( 141 ) are provided with a surface area which is enlarged in relation to their core diameters.   
   
   
       2 . The chair as claimed in  claim 1 , wherein
 a) the plug-in part ( 22 , 22 ′) is designed as a plug-in stub ( 22 , 22 ′) which extends from the rear leg ( 2 , 2 ′) and is of elliptical cross section, the cross section of the plug-in stub ( 22 , 22 ′) tapering conically in the direction of the free end;   b) the openings ( 141 ) have an elliptical cross section which complements the plug-in stubs ( 22 , 22 ′) and widens in the direction of the inlet of the openings ( 141 ); and   c) the openings ( 141 ) are oriented toward the sides of the chair.   
   
   
       3 . The chair as claimed in  claim 2 , wherein
 a) on their outer surface, the plug-in stubs ( 22 , 22 ′) have an encircling outer toothing formation ( 220 , 220 ′) which extends in the axial direction of the plug-in stubs ( 22 , 22 ′) and openings ( 141 ); and   b) on their inner surface, the openings ( 141 ) have an inner toothing formation ( 140 , 140 ′) which complements the outer toothing formation ( 220 , 220 ′) of the plug-in stubs ( 22 , 22 ′).   
   
   
       4 . The chair as claimed in  claim 3 , wherein a rear leg ( 2 , 2 ′) comprises:
 a) an elongate leg support ( 20 , 20 ′);   b) a curved connector ( 21 , 21 ′) extending at the top end ( 201 , 201 ′) of the leg support ( 20 , 20 ′); and   c) the plug-in stub ( 22 , 22 ′), which adjoins the curved connector ( 21 , 21 ′) and is arranged horizontally in the plugged-in state.   
   
   
       5 . The chair as claimed in  claim 4 , wherein the rear leg ( 2 , 2 ′) merges upward into an armrest ( 24 , 3 ;  24 ′, 3 ′). 
   
   
       6 . The chair as claimed in  claim 5 , wherein a rear leg ( 2 , 2 ′) comprises:
 a) a connecting part ( 23 , 23 ′) which is designed as an extension of the leg support ( 20 , 20 ′) and has its bottom end ( 230 , 230 ′) extending at the top end ( 201 , 201 ′) of the leg support ( 20 , 20 ′);   b) a bottom armrest part ( 24 , 24 ′) which is attached to the top end ( 231 ,  231 ′) of the connecting part ( 23 , 23 ′) and is arranged horizontally when the rear leg ( 2 , 2 ′) is in the plugged-in state;   c) a separate, top armrest part ( 3 , 3 ′) being provided and being fastened on the bottom armrest part ( 24 , 24 ′).   
   
   
       7 . The chair as claimed in  claim 6 , wherein the seat ( 11 ) is of shell-like design and:
 a) has an upwardly projecting lateral wall periphery ( 112 , 112 ′) along each of its lateral boundaries; and   b) has an upwardly projecting rear wall periphery ( 113 ) along its rear boundary;   c) the lateral wall peripheries ( 112 , 112 ′) merge into the rear wall periphery ( 113 ) curved transition region ( 114 , 114 ′).   
   
   
       8 . The chair as claimed in  claim 7 , wherein
 a) arranged in the corner regions at the rear end ( 110 ), on the upwardly oriented side of the seat ( 11 ), are housing-like attachment parts ( 14 , 14 ′) which enclose the openings ( 141 ), which extend parallel to the rear wall periphery ( 113 );   b) the attachment parts ( 14 , 14 ′) are bounded by a rear wall ( 142 ) in the direction of the seat interior;   c) the openings ( 141 ) open out into the transition regions ( 114 , 114 ′) between the lateral wall peripheries ( 112 , 112 ′) and the rear wall periphery ( 113 );   d) an externally accessible screwhole ( 143 ) is provided in the rear wall ( 142 );   e) the plug-in stubs ( 22 , 22 ′) have an internal cavity ( 221 );   f) projecting from the inner surface of the cavity ( 221 ) is a convexity ( 222 ) which is arranged longitudinally in relation to the axis of the plug-in stub ( 22 , 22 ′); and   g) an internally threaded blind hole ( 223 ) is provided in the convexity ( 222 ), the blind hole ( 223 ) coinciding with the screwhole ( 143 ) in the rear wall ( 142 ) of the attachment part ( 14 , 14 ′) in the plugged-in state.   
   
   
       9 . The chair as claimed in  claim 8 , wherein the chair has:
 a) a unit-spaced rib formation ( 13 ) arranged at the front end ( 111 ) of the seat ( 11 ), on the upwardly oriented side thereof; the rib formation comprising:   aa) spaced-apart longitudinal ribs ( 130 ) which are arranged parallel to the front boundary of the seat ( 11 ) and project upward with a forward slant;   ab) spaced-apart transverse ribs ( 131 ) which are arranged transversely to the longitudinal ribs ( 130 ) and project upward from the seat ( 11 );   b) a sandwich-construction cushion comprising:   ba) a bottom sheet ( 50 ) which is to be foamed onto the seat ( 11 ), extends between the lateral wall peripheries ( 112 , 112 ′), reaches, in the forward direction, beyond the unit-spaced rib formation ( 13 ) is adjacent, in the rearward direction, to the rear wall periphery ( 113 ) and, during foaming, flows into first interspaces ( 132 ) formed between the longitudinal ribs ( 130 ) and transverse ribs ( 131 );   bb) a top sheet ( 51 ) which is arranged parallel to the bottom sheet ( 50 ) and congruently therewith and, in the rear corner regions, has a respective contour, in the clearance between the attachment parts ( 14 , 14 ′) and seat ( 11 ), in which the attachment parts ( 14 , 14 ′) are embedded; and   bc) a cushion foam material ( 52 ) which is introduced between the bottom sheet ( 50 ) and top sheet ( 51 ).   
   
   
       10 . The chair as claimed in  claim 9 , wherein the seat ( 11 ) has a through-passage ( 150 ) at the rear end, and the back rest ( 12 ) comprises:
 a) two upwardly projecting vertical brackets ( 120 , 120 ′) which have their bottom ends ( 121 , 121 ′) extending in the corner regions at the rear end ( 110 ) of the seat ( 11 );   b) a crossbar ( 123 ) connecting the two vertical brackets ( 120 , 120 ′) at their top ends ( 122 , 122 ′);   c) a backrest cover ( 4 ) which can be pulled over the two vertical brackets ( 120 , 120 ′) and the crossbar ( 123 ), and   d) tensioning strips ( 40 ) which extend beyond the through-passage ( 150 ) on the upwardly oriented side of the seat ( 11 ) and which are inserted in a hem ( 41 ) at the bottom end of the backrest cover ( 4 ).