Patent ID: 7341209

Claim:
A spray gun assembly structure, comprising a connecting tube equipped with a first coupling head at one end to connect to a water supply, and a second coupling head at the other end to mount to a spray gun; the spray gun having a valve body with an interior defined by a valve chamber for the accommodation of a valve assembly composed of an elastic sleeve, a sealing ring, a washer, a spring element, a control pin with a waterproof hoop mounted thereto, and an abutment collar equipped with a watertight ring; the valve body having an outer-threaded end extending at one side with a water-sealing ring mounted thereto to secure to a spray nozzle thereby, and the spray nozzle having a plastic washer mounted thereto to precisely contact with the abutment collar; the valve body also having a cavity defined within another end through which one end of the control pin is guided, the control pin extending there-through to mount to an actuation portion of a press handle to form linking movement therewith; beneath the cavity there being disposed an arcuate groove into which a roll ball is accommodated to precisely abut against the press handle thereby; wherein, the press handle of the spray gun has a bottom edge abutting against the roll ball disposed beneath the cavity of the valve body to form a pivoting point so that when the press handle is pushed by force the bottom edge of the press handle can slide along the surface of the roll ball to actuate and draw at the control pin, facilitating easier and effort-saving operation of the spray gun, whereby the spray gun can be easily switched to open or close the water discharge, regardless of the pressure of the water supply, and the press handle can be firmly operated without getting loose or coming off, thus achieving more stable application thereby.