Patent ID: 7422162

Claim:
An automatic water inlet switching device for an oscillating sprinkler comprising a sprinkle control unit which drives a sprinkle means to produce angular swinging movement; said sprinkle control unit having a blade-equipped gear transmission set housed therein and working together with a water inlet switching device having an operation unit and a movable swinging seat; said movable swinging seat being provided with two water stop ends at the bottom thereof, in opposite to two water outlet ports defined on a coupling unit and one of said water outlet ports being selectively blocked by one of said water stop ends in operation; and a concaved bounded space having push faces defined therein and placed at the center of the top of said movable swinging seat to operate in cooperation with an actuation stick of the operation unit which comprises an drive rod in connection to said actuation stick operable inside said bounded space so as to move in linkage with said actuation stick; whereby as said sprinkle unit swings to a limiting position set up by a restraint connector in the water inlet switching operation the swinging angle of said actuation stick is limited within said bounded space and said actuation stick will move against said push face of said bounded space so as to gradually produce a built-up force to instantaneously spring away said movable swinging seat whether the water pressure is in high or low operation.