Backrest structure

Abstract

A backrest structure including a pad and a back clip, the back clip has a connecting part and a fixing portion to be held on a lazy back of a chair, when the pad is placed on the chair, the fixing portion can be inserted in a seam of the chair or can be clung on the upper area of the rear side of the chair lazy back, so that an effect of having the pad fixed on the chair can be attained; moreover, the relative position of the pad to the back clip can be adjusted; the pad is provided therein with a heat emitting element, a heat sinking element or an air bag, in order to adjust the temperature of the pad or the thickness of the pad for supporting a user, so that the pad can have multiple functions.

1 . A backrest structure comprising a pad and a back clip, said pad is provided thereon with a receiving opening, said back clip has a connecting part and a fixing portion to be held on a lazy back of a chair, said connecting part of said back clip is movably received in said receiving opening in order that said back clip is movable on a back of said back clip, wherein:
 said connecting part is received in said receiving opening by insertion and is provided with a first connecting unit, and in said receiving opening, a second connecting unit is movably connected with said first connecting unit, position of said back clip relatively to that of said pad is adapted to adjusting by moving of said first connecting unit relatively to said second connecting unit, and thereby allocation of said pad relatively to a chair is adjusted.   
     
     
         2 . The backrest structure as in  claim 1 , wherein: said connecting part and said fixing portion are provided between them with an elastic element, so that an elastic tight clamping and contracting force is provided between them. 
     
     
         3 . The backrest structure as in  claim 1 , wherein: said second connecting unit includes a pair of zippers, while said first connecting unit includes a pair of engaging members for said zippers. 
     
     
         4 . The backrest structure as in  claim 1 , wherein: said second connecting unit is a plate having alternatively arranged concave hollows and convex peaks on its two lateral sides, while said first connecting unit includes two steel balls each being abutted on a spring, size of each said steel ball makes it match with size of and exactly adapted for receiving in any of said concave hollows of said second connecting unit. 
     
     
         5 . The backrest structure as in  claim 1 , wherein: said first and said second connecting units each is a member having thereon parallel transverse strip like embossments having a frictional function for preventing sliding. 
     
     
         6 . The backrest structure as in  claim 1 , wherein: said pad is provided therein with a heat emitting element, and is provided on an outer surface of it with a control unit which is connected with an electric power source to supply electricity for said heat emitting element to control heating temperature of said heat emitting element to make said pad get a function of hot compress. 
     
     
         7 . The backrest structure as in  claim 1 , wherein: said pad is provided therein with an air bag and an aeration unit, and is provided on an outer surface of it with a control module, wherein said control module is connected with an electric power source to provide electric power for said aeration unit to aerate said air bag, and said control module controls operation of said aeration unit to aerate said air bag to inflate said pad to a thickness for supporting a waist of a user. 
     
     
         8 . The backrest structure as in  claim 1 , wherein: said pad is provided therein with a heat sinking element, and is provided on an outer surface of it with a control member; wherein said control member is connected with an electric power source to provide electric power for said heat sinking element for heating, said control member controls the heat sinking element to blow air for a user. 
     
     
         9 . A backrest structure comprising a pad and a back clip, said pad is provided therein with a heat emitting element, and is provided on an outer surface of it with a control unit which is connected with an electric power source to supply electricity for said heat emitting element for heating, and to control heating temperature of said heat emitting element to make said pad get a function of hot compress; said pad is provided thereon with a receiving opening, said back clip has a connecting part and a fixing portion to be held on a lazy back of a chair, wherein:
 said connecting part is received in said receiving opening by insertion and is provided with a first connecting unit, and in said receiving opening, a second connecting unit is movably connected with said first connecting unit, position of said back clip relatively to that of said pad is adapted to adjusting by moving of said first connecting unit relatively to said second connecting unit, and thereby allocation of said pad relatively to a chair is adjusted.   
     
     
         10 . The backrest structure as in  claim 9 , wherein: said connecting part and said fixing portion are provided between them with an elastic element, so that an elastic tight clamping and contracting force is provided between them. 
     
     
         11 . The backrest structure as in  claim 9 , wherein: said second connecting unit includes a pair of zippers, while said first connecting unit includes a pair of engaging members for said zippers. 
     
     
         12 . The backrest structure as in  claim 9 , wherein: said second connecting unit is a plate having alternatively arranged concave hollows and convex peaks on its two lateral sides, while said first connecting unit includes two steel balls each being abutted on a spring, size of each said steel ball makes it match with size of and exactly adapted for receiving in any of said concave hollows of said second connecting unit. 
     
     
         13 . The backrest structure as in  claim 9 , wherein: said first and the second connecting units each is a member having thereon parallel transverse strip like embossments having a frictional function for preventing sliding. 
     
     
         14 . The backrest structure as in  claim 9 , wherein: said pad is provided therein with an air bag and an aeration unit, and is provided on an outer surface of it with a control module, wherein said control module is connected with an electric power source to provide electric power for said aeration unit to aerate said air bag, and said control module controls operation of said aeration unit to aerate said air bag to inflate said pad to a thickness for supporting a waist of a user. 
     
     
         15 . The backrest structure as in  claim 9 , wherein: said pad is provided therein with a heat sinking element, and is provided on an outer surface of it with a control member; wherein said control member is connected with an electric power source to provide electric power for said heat sinking element for heating, said control member controls the heat sinking element to blow air for a user. 
     
     
         16 . A backrest structure comprising a pad and a back clip, said pad is provided therein with an air bag and an aeration unit, and is provided on an outer surface of it with a control module, wherein said control module is connected with an electric power source to provide electric power for said aeration unit to aerate said air bag, and said control module controls operation of said aeration unit to aerate said air bag to inflate said pad to a thickness for supporting a waist of a user; said pad is provided thereon with a receiving opening, said back clip has a connecting part and a fixing portion to be held on a lazy back of a chair, said connecting part of said back clip is movably received in said receiving opening in order that said back clip is movable on a back of said back clip, wherein:
 said connecting part is received in said receiving opening by insertion and is provided with a first connecting unit, and in said receiving opening, a second connecting unit is movably connected with said first connecting unit, position of said back clip relatively to that of said pad is adapted to adjusting by moving of said first connecting unit relatively to said second connecting unit, and thereby allocation of said pad relatively to a chair is adjusted. 
 
     
     
         17 . The backrest structure as in  claim 16 , wherein: said connecting part and said fixing portion are provided between them with an elastic element, so that an elastic tight clamping and contracting force is provided between them. 
     
     
         18 . The backrest structure as in  claim 16 , wherein: said second connecting unit includes a pair of zippers, while said first connecting unit includes a pair of engaging members for said zippers. 
     
     
         19 . The backrest structure as in  claim 16 , wherein: said second connecting unit is a plate having alternatively arranged concave hollows and convex peaks on its two lateral sides, while said first connecting unit connecting unit includes two steel balls each being abutted on a spring, size of each said steel ball makes it match with size of and exactly adapted for receiving in any of said concave hollows of said second connecting unit. 
     
     
         20 . The backrest structure as in  claim 16 , wherein: said first and the second connecting units each is a member having thereon parallel transverse strip like embossments having a frictional function for preventing sliding. 
     
     
         21 . The backrest structure as in  claim 16 , wherein: said pad is provided therein with a heat emitting element, and is provided on an outer surface of it with a control unit which is connected with an electric power source to supply electricity for said heat emitting element to control heating temperature of said heat emitting element to make said pad get a function of hot compress. 
     
     
         22 . The backrest structure as in  claim 16 , wherein: said pad is provided therein with a heat sinking element, and is provided on an outer surface of it with a control member; wherein said control member is connected with an electric power source to provide electric power for said heat sinking element for heating, said control member controls the heat sinking element to blow air for a user.