The utility model discloses a scribble soldering area and derive mechanism, including vertical base plate, be provided with an at least three shaft hole and a bar hole on the vertical base plate, the shaft hole internal rotation is provided with the transmission shaft, the transmission shaft end tight fit that is located vertical base plate one side is provided with the traction wheel, the transmission shaft end tight fit that is located vertical base plate opposite side is provided with synchronous pulley, the dabber is worn to be equipped with in the downthehole cooperation of bar, the rotatable hold -in range take -up pulley that is provided with of one end of dabber, the hold -in range take -up pulley is provided with the hold -in range with homonymy and periphery cooperation that synchronous pulley is located vertical base plate, the hold -in range passes through the synchronous belt drive wheel and is connected with actuating mechanism's output. This scribble soldering area and derive mechanism simple structure is applied to the speed of scribbling the tin in -process and draws through deriving drawing of three at least traction wheels linkages the mechanism, the whole area that has increased the traction wheel and welded the area contact, the traction wheel with weld when taking simultaneous movement, wheel face and the stiction that welds between the area are great, consequently appear welding taking the probability that skids little.