Sprinkler

A sprinkler comprises:

• a hollow box, a first casing and a second casing covering said hollow box, a telescopic pipe disposed in said hollow box longitudinally, and a sprinkling disk disposed on said telescopic pipe,
• said telescopic pipe having at least an outer pipe, a middle pipe in said outer pipe, and an inner pipe in said middle pipe,
• a circular hole formed on a lower periphery of said hollow box,
• a generally round opening formed on a top portion of said hollow box,
• four hollow tubes disposed on a top periphery of said hollow box,
• a threaded hole formed on a lower periphery of said outer pipe,
• a joint having a threaded end passing through said circular hole to be inserted in said threaded hole and a distal end to connect a water pipe,
• said first casing having two rods, a weighted plate, a protrusion and a first curved top,
• a lobe extending downward from an outer rim of said first casing,
• said second casing having two bars, a weighted block, a protuberance and a second curved top,
• a lug extending downward from an outer rim of said second casing,
• said sprinkling disk having a lower disk and an upper disk,
• a hollow connection disposed on said lower disk,
• a plurality of conduits communicating with said hollow connection,
• a plurality of recesses formed on a rim of said lower disk,
• a plurality of grooves formed on a rim of said upper disk to match said corresponding recesses to form a plurality of through holes to receive said corresponding conduits,
• a bolt fastening said lower disk on an upper end of said inner pipe,
• said rods and said bars inserted in said corresponding hollow tubes, and
• wherein a water enters said water pipe, said joint and said telescopic pipe to push said telescopic pipe to extend upward.