This creation provides a kind of automatic water supplement mechanism of pet drinking trough,What container set water inflow,Floating ball,The components such as connection rod set and filler block,Water inflow be incorporated in container and it is exposed enter water portion,There is a water filling port in water inflow,And water inflow has a fixing seat,Linked between floating ball and fixing seat with connecting rod,Floating ball is set below the water filling port of what water inflow,By guidance part limitation, longitudinally straight line floats on the water,Filler block is set on what connecting rod and the water filling port of neighbouring water inflow,It affects connecting rod pivot to put when water level rising floats floating ball and interlocks filler block,When floating ball floats to preset water level and this filler block is driven to block the water filling port,Stop flow into its water in container,Conversely,Water level will be made to reduce when pet drinking,And floating ball affects when being sunk by preset water level connecting rod pivot to put and interlock filler block and recess water filling port,And then the effect of automatic water supplement is generated,Thereby constitute this creation.本創作提供一種寵物飲水器之自動補水機構，在於容器設進水件、浮球、連桿組及止水塞等構件，進水件結合在容器且外露入水部，進水件內具有一注水口，且進水件具有一固定座，浮球與固定座之間以連桿連結，浮球設於進水件之注水口下方，被一導引部限制在水上縱向地直線浮動，止水塞設於連桿上且鄰近進水件之注水口，當水位上升使浮球浮起時牽動連桿樞擺而連動止水塞，當浮球浮起至預設水位時而帶動此止水塞堵住該注水口，使其水停止流入容器中，反之，當寵物飲水時將使水位降低，且浮球由預設水位下沉時牽動連桿樞擺而連動止水塞退離注水口，進而產生自動補水之效果，藉此構成本創作。
