Simple handheld welding laser output head

The utility model discloses a simple and convenient handheld welding laser output head which comprises an energy transmitting optical fiber and a quartz end cap at the rear end of the energy transmitting optical fiber, and further comprises a cylindrical air cooling body used for containing the energy transmitting optical fiber and the quartz end cap. The quartz end cap is mounted at the rear end of the air cooling main body; the rear end of the air cooling body is further provided with an alignment connector and a locking ring which are used for being connected with a welding machine. A positioning piece is arranged in the air cooling main body, an axial through hole is formed in the positioning piece, and the energy transmission optical fiber penetrates through the through hole and is used for positioning; the front end of the positioning piece is provided with a quick connector used for being connected with a teflon pipe. An armored pipe is sleeved outside the polytetrafluoroethylene pipe, the front end of