A sprinkler includes a body and a strike element rotatably mounted on the body. A steering controlling device of a sprinkler is mounted on a body and selectively interlocked with the strike element for change the moving direction of a nozzle of the sprinkler. The steering controlling device includes a first linkage, a second linkage and a torsion spring respectively connected to the first linkage and the second linkage, wherein the first linkage and the second linkage are sequentially pivotally mounted onto the body of the sprinkler. The first linkage has a first through hole defined therein and the first through hole is divided into a guiding portion and an engaging portion. The second linkage has a second through hole defined therein and the first through hole is divided into a guiding portion and an engaging portion, wherein the second through is a mirror image of the first through hole. The torsion spring is pre-pressed and has two opposite ends respectively extending through a corresponding one of the two guiding portions. The two opposite ends of the torsion spring respectively and automatically engage to a corresponding one of the two engaging portions of each of the first through hole and the second through hole due to the restitution force of the torsion spring to simplify the assembling step of the steering controlling device of a sprinkler.一種撞擊式灑水器,其主要係包含有一本體上以擊一懸設於本體上之擺動件。一裝設於本體上並選擇性地與撞擊式灑水器之擺動件連動;該轉向控制裝置係包含有依序水平樞設於殼體中之第一連桿與第二連桿,以及一扭力彈簧,其中該扭力彈簧之兩端係分別連設於該第一連桿以及該第二連桿;該第一連桿上係形成有一第一穿孔,該第一穿孔係由內而外依序水平設置有一卡扣部以及一向外逐漸變寬之導引部;該第二穿孔之結構與第一穿孔之結構相同,同樣具有一卡扣部以及一導引部,惟設置之方向相反;該扭力彈簧之兩端係分別穿置於該第一穿孔與第二穿孔中,而在組裝扭力彈簧的過程當中,該兩導引部,係可分別將相對應之卡制段,利用扭力彈簧預壓之恢復力,導引置相對應之卡扣部中,降低扭力彈簧組裝之難度。16‧‧‧殼體161‧‧‧第一透空部162‧‧‧第二透空部30‧‧‧轉向控制裝置31‧‧‧第一連桿310‧‧‧連動桿311‧‧‧第一穿孔312‧‧‧卡扣部313‧‧‧導引部32‧‧‧第二連桿321‧‧‧連動結構322‧‧‧第二穿孔323‧‧‧卡扣部324‧‧‧導引部33‧‧‧扭力彈簧331‧‧‧卡制段
