Retractable pulling rod control device

Abstract

A retractable pulling rod control device, wherein, a concave portion and a through hole are provided on a plug, and a link piece is disposed on said concave portion, such that said link piece is provided with a plurality of protrusion portions exposed outside said through hole; and a first and a second T-shaped link pieces are installed in said through hole and are fastened to each other, said first T-shaped link piece is provided with a first protrusion block, and said second T-shaped link piece is provided with a groove and a second protrusion block, said protrusion portion is fastened correspondingly to said groove, and said protrusion portion is able to slide in said groove in bringing said first and said second T-shaped link pieces into motion in said through hole, hereby achieving the effect of controlling the extension and retraction of each section of a pulling rod.

1 . A retractable pulling rod control device, comprising
 a plug, having a concave portion and a through hole disposed thereon;   a pushing piece, disposed in said concave portion, and is provided with a plurality of protrusion portions, and said protrusion portions are exposed outside said through hole;   a first T-shaped link piece, received and installed in said through hole, and is provided with a first protrusion block; and   a second T-shaped link piece, connected to said first T-shaped link piece and is received and installed in said through hole, and is provided with a second protrusion block and a plurality of grooves, said protrusion portion of said pushing piece is fastened correspondingly to said groove, and said protrusion portion slides in said groove in bringing said second T-shaped link piece into moving in said thorough hole, thus bringing said first T-shaped link piece into motion.   
     
     
         2 . The retractable pulling rod control device as claimed in  claim 1 , wherein said groove is disposed slantingly in said second T-shaped link piece. 
     
     
         3 . The retractable pulling rod control device as claimed in  claim 1 , wherein said first T-shaped link piece includes a first spring and a first T-shaped steel bead, said first spring is sleeved around said first T-shaped steel bead, and are both disposed in said through hole. 
     
     
         4 . The retractable pulling rod control device as claimed in  claim 1 , wherein said second T-shaped link piece is provided with an opening, such that said first T-shaped link piece penetrates into said opening, and is fastened and connected to said second T-shaped link piece. 
     
     
         5 . The retractable pulling rod control device as claimed in  claim 4 , further comprising:
 a second spring, installed on said first protrusion block, and is connected to said first T-shaped link piece, and it penetrates together with said first T-shaped link piece into said opening of said second T-shaped link piece.   
     
     
         6 . The retractable pulling rod control device as claimed in  claim 1 , further comprising:
 a first tube body, said plug is installed on said first tube body.   
     
     
         7 . The retractable pulling rod control device as claimed in  claim 6 , further comprising:
 a pin, said plug and said first tube body are connected by means of said pin.   
     
     
         8 . The retractable pulling rod control device as claimed in  claim 6 , further comprising:
 a second tube body, sleeved around and connected to said first tube body and is wrapped around said plug, and is fastened to said second protrusion block.   
     
     
         9 . The retractable pulling rod control device as claimed in  claim 6 , further comprising:
 a push button, installed on said first tube body, and is connected to said pushing piece.