Driving unit for a caulking gun to drive two sealing materials

Abstract

A driving unit for a caulking gun includes at least two push portions respectively located on two respective rear ends of at least two tubes of a dual-tube unit so as to push material in the at least two tubes toward an outlet on a front end of the dual-tube unit. At least one connection portion is connected between the at least two push portions and a blade is formed on the front end of the at least one connection portion. The blade cuts two adjacent walls of the dual-tube unit so that the at least two push portions are moved forward when the driving unit is pushed forward. The materials in the at least two tubes are mixed and quickly solidified.

What is claimed is: 
     
         1 . A driving unit for a caulking gun, comprising:
 at least two push portions which are respectively located on two respective rear ends of at least two tubes of a dual-tube unit so as to push material in the at least two tubes toward an outlet on a front end of the dual-tube unit, and   at least one connection portion connected between the at least two push portions, a blade formed on a front end of the at least one connection portion, the blade cutting two adjacent walls of the dual-tube unit so that the at least two push portions are moved forward.   
     
     
         2 . The driving unit as claimed in  claim 1 , wherein the at least one connection portion is axially connected between the at least two push portions and a space is defined between the at least two push portions and the at least one connection portion. 
     
     
         3 . The driving unit as claimed in  claim 1 , wherein the at least two push portions and the at least one connection portion are integrally formed.