An impingement sprinkler has a main body, a rotation guiding mechanism, a slant adjustment mechanism, a turning control component and a rotation limiting mechanism. The rotation limiting mechanism has a first limiting piece and a second limiting piece. The main body has a frame portion and a sprinkler head. The rotation guiding mechanism includes a torsional spring and a swinging piece. The swinging piece has a first contacting portion. The turning control component has a second contacting piece and a poking rod portion. The poking rod portion always contacts the stopping portions such that the first and second limiting pieces interfere with the poking rod portion.本創作係提供一種撞擊式灑水器之結構改良，該撞擊式灑水器主要結構係包括本體、導轉構件、傾擺調整構件、轉向控制組件以及轉向限位構件所共構而成；其中該傾擺調整構件係設置於本體所設架部與本體下端的組接座之間，能夠使該本體呈可傾擺調整狀態而能改變出水角度；該轉向控制組件係設置於該本體之架部一側，用以變換本體的轉向，且該轉向控制組件所設撥桿部係隨該本體傾擺時而形成有一擺動路徑；本創作主要利用轉向限位構件之第一、第二限位件具有朝該擺動路徑方向延伸的第一、第二止擋部，能夠於本體向上或向下傾擺調整時，該撥桿部係皆能接觸該第一、第二止擋部，令該第一或第二限位件能干涉該撥桿部，使其作動而能令本體保有變換轉向之動作，故當本體向上或向下傾擺時，係皆能夠確實執行轉向動作對周遭進行灑水，達到提升產品實用性以及使用便利性等實用效益。
