This creation include at least have one can be nested with animal buttocks ontology,One group set the Beam End band of two sides above what ontology,One can be mobile on what Beam End band regulating part group,Group set two side of what ontology a left side,Right leg binding belt,One group set what it is left,The engaging member of right leg binding belt another end,And one group of mobile set on what ontology,Wherein,This system by one have closing step shape through hole,One with through hole be not attached to logical upper concave-arc part,The upper side flap of two side of concave-arc part on the what of position,And one bootable mobile's running fix guidance part； In addition,Activity system formed by an opposite what faeces bag sack seat close step shape axis hole,Concave-arc part is set up on one opposite what ontology arc recess,And one can be nested with the conducting portion moved on the guidance part of what ontology.本創作至少包括有一可套置動物臀部的本體、一組設於本體上方二側的束尾帶、一可於束尾帶上移動用的調節件組、已組設於本體二側的左、右束腿帶、一組設於左、右束腿帶另端的結合件、以及一組設於本體上的活動體，其中，該本體係由一具有封閉階級狀的貫穿孔、一與貫穿孔不相連通的上凹弧部、已位於上凹弧部二側的上側翼片、以及一可引導活動體移動定位用的導引部；另，活動體係由一相對於便袋袋口座所形成封閉階級狀的軸孔、一相對於本體之上凹弧部所設立的弧凹部、以及一可套置於本體之導引部上移動的導通部。
