Ultrasonic welding head structure

The utility model discloses an ultrasonic welding head structure which is characterized in that side welding teeth on the left side and the right side of a middle welding tooth are symmetrically arranged on the two sides in the transverse direction by taking the middle as a boundary, the angle of a first included angle is larger than 45 degrees and smaller than 90 degrees, and the angle of a second included angle is smaller than 45 degrees; due to the fact that the second included angle between the edge of the sawtooth-shaped insection and the welded workpiece is smaller than the first included angle of the trapezoid insection, the counter-acting force of the workpiece for resisting displacement generated in the horizontal direction in the welding process is reduced, workpiece surface deformation caused by vibration is restrained, the penetration depth is low, and foil damage can be reduced to a certain degree. And on the other hand, redundant external energy can form larger amplitude in the horizontal direct