Opening and closing device for A curtain

Abstract

An opening and closing device for a curtain mounted on a guiding part, the guiding part is provided with the curtain; the opening and closing device is used for driving automatic opening and closing of the curtain; the opening and closing device includes a mainframe and a connecting mechanism. The mainframe includes a shell, a driver and a driving wheel; the driving wheel and the driver are mounted in the shell, the driver drive the driving wheel to rotate. The connecting mechanism includes a hanging piece and a bracket; a first end of the bracket is inserted into the shell, the hanging piece is movably connected with a second end of the bracket and hung on the guiding part; the hanging piece can be moved vertically relative to the bracket so that the driving wheel is attached closely to the outer wall of the guiding part.

What is claimed is: 
     
         1 . An opening and closing device for a curtain, said curtain is hung on a guiding part; said opening and closing device is used for driving said curtain to move along said guiding part, wherein said opening and closing device comprising:
 a mainframe, comprising a shell, a driver and a driving wheel; said driver and said driving wheel is mounted in said shell, said driver drives said driving wheel to rotate;   a connecting mechanism, comprising a bracket with a first end and a second end, and a hanging piece; said first end of said bracket is inserted into said shell, said second end of said bracket is movably connected with said hanging piece, said hanging piece is hung on said guiding part; said hanging piece can be moved vertically relative to said bracket so that said driving wheel is attached closely to an outer wall of said guiding part; when said driver drives said driving wheel to rotate, said driving wheel is rolled along said guiding part, and said mainframe drives said hanging piece to move along said guiding piece and to push and pull said curtain.   
     
     
         2 . The opening and closing device for said curtain according to  claim 1 , wherein said connecting mechanism also includes a locked component, said hanging piece is provided with a cavity, said locked component is disposed in said cavity, when said hanging piece can be moved vertically relative to said bracket, said locked component can lock said hanging piece and said bracket. 
     
     
         3 . The opening and closing device for said curtain according to  claim 2 , wherein said locked component includes a shaft and a wedge; said wedge is connected to said shaft, said shaft is movably arranged in said cavity, said second end of said bracket is provided with a rack, said rack is passed through said cavity and meshed with said wedge. 
     
     
         4 . The opening and closing device for said curtain according to  claim 3 , wherein said locked component also includes a first elastic member and a compressing piece; said compressing piece is movably passed through said hanging piece and fixed with said shaft, said first elastic member is connected with said wedge; when said first elastic member is in natural state, said wedge is meshed with said rack, said compressing piece is pressed to drive said shaft to rotate so as to drive said said wedge away from said rack, said first elastic member is in compressed state. 
     
     
         5 . The opening and closing device for said curtain according to  claim 3 , wherein said bracket includes a first rod, a transfer and a second rod; said first rod and said second rod are respectively perpendicularly connected to two ends of said transfer and extend in different directions; said first rod is movably connected to said shell , said rack is arranged on said second rod. 
     
     
         6 . The opening and closing device for said curtain according to  claim 5 , wherein said hanging piece includes a first hanging portion and a second hanging portion connected to said first hanging portion, said second rod is passed through said first hanging portion and approximately perpendicular to said first hanging portion, said second hanging portion is hung on said guiding part. 
     
     
         7 . The opening and closing device for said curtain according to  claim 6 , wherein said second hanging portion includes a first cantilever and a second cantilever which are connected in an angle between 30-150°. 
     
     
         8 . The opening and closing device for said curtain according to  claim 7 , wherein said connecting mechanism also includes rollers; said first cantilever and said second cantilever are at least provided with one of said rollers; when said roller is hanging on said guiding part, said roller is in rolling contact with said guiding part. 
     
     
         9 . The opening and closing device for said curtain according to  claim 5 , wherein said shell includes a base and a connector which is detachable connecting with said base, said connector is provided with a groove, said first rod can movably inserted into said groove. 
     
     
         10 . The opening and closing device for said curtain according to  claim 1 , wherein said hanging piece includes a first shell, a second hell, a third shell and a fourth shell; said second hell and said third shell are respectively connected to both sides of the first shell, said fourth shell is connected to a bottom of the first shell; said first shell, said second hell, said third shell and said fourth shell are clamped and enclosed to form a cavity.