A kind of structure-improved of simple tooth flusher,Comprising a hydro-peening head,One quick coupling and connection what water hose between the two,The water outlet at what shunt valve or handlance pump Pu can be assembled using the quick coupling； Wherein the quick coupling by the first engaging portion,Second engaging portion and a sealing ring are constituted,First engaging portion is equipped with the pillar of positional symmetry,The L-type slot that second engaging portion has position opposite with pillar,The pillar can pass through L-type slot card what slot end； The sealing ring is then set between the first engaging portion of what and the second engaging portion； Accordingly,The first engaging portion and the second engaging portion is enabled easily can quickly to tear group open.一種簡易沖牙器之改良結構，包含一噴洗頭、一快速接頭及連結於二者之間的水軟管，利用該快速接頭可組裝於分水閥或手壓水泵浦之出水口；其中該快速接頭係由第一結合部、第二結合部及一密封圈所構成，該第一結合部設有位置對稱的凸柱，該第二結合部具有位置與凸柱相對之L型槽，該凸柱可通過L型槽卡於槽末端；該密封圈則設於第一結合部與第二結合部之間；據此，令第一結合部與第二結合部可以簡易的快速拆組。
