A kind of direct current inflating pump,It is that accommodating space is equipped in the box body of what integrated molding,Bottom side is then equipped with the opening communicated with the accommodating space,System, which is installed with, in the accommodating space of the box body inflates mould group and switching group,The bottom cover system of one drawing and pulling type for bearing battery pack,When the bottom cover and what lid close the opening of the box body bottom side,It can make the switching group in the battery pack electrical connection what box body,And electrical opening and closing can be made by the switching group and controlled； Thereby,There is the integrally formed box body of opening using only what bottom side,It can effectively prevent aqueous from penetrating into box body from top splash,And can pull bottom cover and easily what replace battery pack,And then reach effectively promotion waterproof effect and the benefit that just what uses.一種直流打氣泵，其係於一體成型之盒體內設有容置空間，底側則設有與該容置空間相通之開口，該盒體之容置空間內係裝設有打氣模組及開關組，一抽拉式的底蓋係可供承置電池組，該底蓋並於蓋合該盒體底側之開口時，可使該電池組電性連結於盒體內之開關組，而可由該開關組作電性的啟閉控制；藉此，利用僅於底側具有開口之一體成型的盒體，即可有效的防止水液自上方噴濺而滲入盒體內，並且可抽拉底蓋而易於更換電池組，進而達到有效提升防水效果及便於使用之效益。
