Chair with a head and neck support structure

Abstract

A chair includes a backrest, and a head and neck support structure arranged at the top side of the backrest for supporting the head and neck of a person resting on the backrest. The head and neck support includes a neck support portion shaped like a convex bar and transversely arranged at the top side of the backrest, and a plurality of radial V-grooves radially upwardly extended from the top side of the neck support portion and inclining upwardly backwardly from the neck support portion in a smooth manner.

What the invention claimed is: 
     
         1 . A chair comprising a backrest, and a head and neck support structure arranged at a top side of said backrest for supporting the head and neck of a person resting on said backrest, wherein said head and neck support comprises a neck support portion shaped like a convex bar and transversely arranged at the top side of said backrest, and a plurality of radial V-grooves radially upwardly extended from a top side of said neck support portion, said radial V-grooves inclining upwardly backwardly from said neck support portion. 
     
     
         2 . The chair as claimed in  claim 1 , wherein said radial V-grooves extend radially from a center point corresponding to the lumbar position point. 
     
     
         3 . The chair as claimed in  claim 1 , wherein the number of said radial V-grooves is 3. 
     
     
         4 . The chair as claimed in  claim 1 , wherein said radial V-grooves incline at 15° angle. 
     
     
         5 . The chair as claimed in  claim 1 , wherein said head and neck support structure comprises at least one binding belt disposed at a back side thereof adapted for detachably fastening said head and neck support structure to said backrest at the desired elevation. 
     
     
         6 . A chair comprising:
 a backrest for supporting the user's back;   two side rails respectively affixed to two opposite lateral sides of said backrest and protruding over a top side of said backrest, each said side rail defining therein a longitudinal sliding groove;   a head and neck support structure slidably coupled between said two side rails above said backrest, said head and neck support structure comprising a neck support portion shaped like a convex bar and transversely arranged at the top side of said backrest, a plurality of radial V-grooves radially upwardly extended from a top side of said neck support portion, said radial V-grooves inclining upwardly backwardly from said neck support portion, two slides respectively coupled to the longitudinal sliding grooves of said two side rails; and   positioning means for locking said head and neck support structure to said side rails.   
     
     
         7 . The chair as claimed in  claim 6 , wherein said positioning means comprises a plurality of recessed locating portions respectively formed in the longitudinal sliding groove in each of said two side rails at different elevations, two spring members respectively affixed to said slides, and two positioning balls respectively supported on said spring members for selectively engaging in said recessed locating portions to lock said head and neck support structure to said side rails. 
     
     
         8 . A chair comprising:
 a backrest for supporting the user's back;   an electric lifting mechanism mounted in said backrest; and   a head and neck support structure slidably coupled to said electric lifting mechanism and movable up and down relative to said backrest by said electric lifting mechanism, said head and neck support structure comprising a neck support portion shaped like a convex bar and transversely arranged at the top side of said backrest, a plurality of radial V-grooves radially upwardly extended from a top side of said neck support portion, said radial V-grooves inclining upwardly backwardly from said neck support portion, two slides respectively coupled to the longitudinal sliding grooves of said two side rails.