Welding device for handheld packing machine having handle

A welding device for a handheld packing machine having a handle, the handheld packing machine being provided with a handle for a tensioning mechanism, the welding device comprising a movable welding workpiece, a motor, and a downward pressing and lifting motion assembly for the movable welding workpiece, the downward pressing and lifting motion assembly being provided with a rotating member;

• the rotating member matching with a gear connected to the motor through transmission teeth;
• wherein the motor drives, by means of the downward pressing and lifting motion assembly, the movable welding workpiece to move downward, the welding device is provided with a connecting component which can move back and forth synchronously with the lifting/lowering motion of the movable welding workpiece, the welding device is provided with a reset driving member, the reset driving member is connected to the handle, the connecting component is located at a position corresponding to the driving member, and when the movable welding workpiece is in the welding working position, the connecting component is located on the motion path of the reset driving member when the handle is lifted, and when the handle is lifted, the connecting component can be driven by the reset driving member to move in a first direction, thereby driving the movable welding workpiece through the downward pressing and lifting motion assembly to the initial position;
• the handheld packing machine is provided with a sensor, after the welding is finished, the motor starts to rotate reversely according to a signal of the sensor until transmission teeth on the rotating member and a gear connected to the motor are switched from a disengaged state to an engaged state.