Abstract: Water flow through a sprinkler is controlled by a valve assembly that includes a spring-biased slide shaft disposed within a valve tube and controlled by the pivotal movement of a trigger to permit accurate control of water dispensed through a barrel body by varying the separation between a stop flange of the slide shaft and a water inlet of the valve tube.

Abstract: A water discharge controlling structure of a sprinkling gun, in which a controlling bolt is slidably disposed in a barrel of the sprinkling gun and a nut is screwed with a rear end of the controlling bolt. The barrel has a rear end formed with two lateral axial shallow channels and two lateral arms of the U-shaped pushing plate are slidably received in the shallow channels. The pushing plate has a middle bridge portion formed with a key hole-shaped driving hole through which the controlling bolt is passed. The nut has a narrowed neck portion chucked in the key hole-shaped driving hole of the pushing plate. Each lateral arm has a free end formed with an outward bent engaging plate. A pivot seat is disposed on upper face of the barrel for pivotally connecting with two upward extending lugs of the trigger. Each lug is formed with an engaging slot for the engaging plate of the lateral arm of the pushing plate to engage therein.