Chair structure

Abstract

The present invention concerns a chair structure ( 10 ) comprising a base ( 1 ), a seat (13), a connection element ( 60 ) for connecting said base ( 1 ) to said seat ( 13 ), said base being able to be attached in at least one point (P 1 ) to a support plane, first connection means ( 81 ) for connecting a first end ( 80 ) of said connection element ( 60 ) to said base ( 1 ), said first connection means ( 81 ) being able to rotate with respect to said base to allow said connection element to rotate about a first axis (X) that extends in a direction substantially parallel to said support plane, so that said seat ( 13 ) passes between a first operative position (Q 1 ), in which chair structure ( 10 ) is that said base ( 1 ) is able to rotate with respect to said support plane about a second axis (Y 1 ) that extends in a direction transversal to said support plane, to pass between a first working configuration (C 1 ) and a second entry or exit configuration.

1 . Chair structure ( 10 ) comprising:
 a base ( 1 ),   a seat ( 13 ),   a connection element ( 60 ) for connecting said base ( 1 ) to said seat ( 13 ),   said base being able to be attached in at least one point (P 1 ) to a support plane,   first connection means ( 81 ) for connecting a first end ( 80 ) of said connection element ( 60 ) to said base ( 1 ), said first connection means ( 81 ) being able to rotate with respect to said base to allow said connection element to rotate about a first axis (X) that extends in a direction substantially parallel to said support plane, so that said seat ( 13 ) passes between a first operative position (Q 1 ), in which said seat ( 13 ) is suitable for receiving a user in an ergonomic fashion, and a second operative position (Q 2 ),   characterised in that   said base ( 1 ) is able to rotate with respect to said support plane about a second axis (Y 1 ) that extends in a direction transversal to said support plane, to pass between a first working configuration (C 1 ) and a second entry or exit configuration.   
     
     
         2 . Chair structure ( 10 ) in accordance with  claim 1 , wherein said base ( 1 ) comprises:
 a fixed part ( 7 ),   a mobile part ( 5 ),   attachment means ( 8 ) to attach said fixed part ( 7 ) to said support plane in at least one point (P 1 ),   rotation means ( 6 ) suitable for allowing a rotation of said mobile part ( 5 ) with respect to said fixed part ( 7 ) about a first pin ( 9 ) that extends along said second axis (Y 1 ), said mobile part being suitable for passing between said first configuration (C 1 ) and said second configuration (C 2 ).   
     
     
         3 . Chair structure ( 10 ) in accordance with  claim 2 , wherein said base ( 1 ) comprises elastic means ( 90 ) suitable for acting between said fixed part ( 7 ) and said mobile part ( 5 ) to keep said mobile part ( 5 ) orientated in a predetermined angular position with respect to said fixed part ( 7 ), said predetermined angular position corresponding to said first configuration (C 1 ). 
     
     
         4 . Chair structure ( 10 ) in accordance with  claim 1 , wherein said first connection means ( 81 ) having a second pin ( 86 ) that extends along said first axis (X), to allow said passage between said first operative position (Q 1 ) and said second operative position (Q 2 ), the latter comprising a forward operative position (Q 2 A) and an intermediate operative position (Q 3 ) between said first operative position (Q 1 ) and said forward operative position (Q 2 A), wherein:
 in said first operative position (Q 1 ) it is foreseen for the seat ( 13 ) to be able to receive the user in the seating area.   in said second forward operative position (Q 2 A) it is foreseen for the back ( 16 ) to be close to an end edge of a desk ( 50 ) and   in said third intermediate operative position (Q 3 ) it is foreseen that when the user is positioned on the seat ( 13 ) a person is allowed to pass behind the user without the user having to leave the seating area or get up from the seat ( 13 ).   
     
     
         5 . Chair structure ( 10 ) in accordance with  claim 4 , wherein said second pin ( 86 ) extends through an opening ( 3 ) formed in said mobile part ( 5 ) of said base ( 1 ) and wherein an end of said second pin is associated with said mobile part ( 5 ) and the other end of said second pin ( 86 ) is associated with said first connection means ( 81 ) of said connection element ( 60 ). 
     
     
         6 . Chair structure ( 10 ) in accordance with  claim 1 , wherein in said chair structure ( 10 ) it is possible to identify a front side, with reference to the direction in which said user faces, said second axis (Y 1 ) being staggered with respect to a third axis (Y 2 ) by a predetermined distance (d 1 ), so that said second axis (Y 1 ) is behind said front side of said chair structure ( 10 ) and said third axis (Y 2 ), said third axis (Y 2 ) being parallel to said second axis (Y 1 ) and passing through said first axis (X). 
     
     
         7 . Chair structure ( 10 ) in accordance with  claim 1 , wherein in said chair structure ( 10 ) it is possible to identify a front side, with reference to the direction in which said user faces, said second axis (Y 1 ) being staggered with respect to a third axis (Y 2 ) by a predetermined distance (d 1 ), so that said second axis (Y 1 ) is in front of said front side of said chair structure ( 10 ) and said third axis (Y 2 ), said third axis (Y 2 ) being parallel to said second axis (Y 1 ) and passing through said first axis (X). 
     
     
         8 . Chair structure ( 10 ) in accordance with  claim 1 , wherein said chair structure ( 10 ) comprises second connection means ( 83 ) to connect a second end ( 82 ) of said connection element ( 60 ) to said seat ( 13 ), said second connection means ( 83 ) being suitable for allowing a rotation of said seat ( 13 ) about a fourth axis (Y 3 ) that extends in a direction substantially parallel to said second axis (Y 1 ). 
     
     
         9 . Chair structure ( 10 ) in accordance with  claim 8 , wherein said second end ( 82 ) of said connection element ( 60 ) extends along a first direction and said First end ( 81 ) of said connection element ( 60 ) extends along a second direction, such directions being incident to each other, said second end ( 82 ) and said first end ( 81 ) being joined to each other in the area of incidence through a curvilinear portion. 
     
     
         10 . Chair structure ( 10 ) in accordance with  claim 8 , wherein said fourth axis (Y 3 ) is staggered with respect to said third axis (Y 2 ). 
     
     
         11 . Chair structure ( 10 ) in accordance with  claim 1 , wherein said second axis (Y 1 ) is perpendicular to said support plane.