Impact sprinkler with adjustable counterweight member

An impact sprinkler, comprising:

• a main body, with a lower end of the main body being provided with an inlet water pipe joint end, and an upper end of the main body being provided with a top section part;
• a rotation guiding member provided on the top section part of the upper end of the main body, including a torsional spring and a swinging part, wherein the swinging part defines a front section and a rear section, and wherein the rear section of the swinging part forms a driving section;
• an adjustable counterweight member provided on the driving section and being capable of segmentation positioning, the adjustable counterweight member being made up of a counterweight component and an adjusting structure, wherein the adjusting structure includes a plurality of spaced positioning edges and at least one elastic clamping fringe, and wherein each of the at least one elastic clamping fringe is adapted for selectively clasping on any one of the positioning edges so as to fix the counterweight component in a selected position on the adjusting structure, whereby the counterweight component has a state for flexible adjustment and segmentation positioning, so as to accurately control a swing angle of the swinging part, and to effectively avoid movement of the counterweight component caused by vibration or collision.