Pumping device

A pumping device including:

• a base including a main body and a cover, the main body including a base portion, a first one-way valve, a second one-way valve, a first perforation, a second perforation and a third perforation, the base portion defining a first side and second side opposite to each other, the first one-way valve and the second one-way valve being disposed on the base portion, the first one-way valve including a first inlet and a first nozzle, the first nozzle being made of an elastic material, the first nozzle being located at the first side and including a first outlet selectably in communication with the first side, a first channel defined by the first nozzle tapering from the second side towards the first side, the first channel being in communication with the first inlet, the second one-way valve including a second inlet and a second nozzle, the second nozzle being made of an elastic material, the second nozzle being located at the first side and including a second outlet selectably in communication with the first side, a second channel defined by the second nozzle tapering from the second side towards the first side, the second channel being in communication with the second inlet, the first perforation, the second perforation and third perforation being disposed through the base portion, the cover being attached to the second side and covering the base portion to form a first air passage and a second air passage, the first air passage being in communication with the first perforation and the second inlet, the second air passage being in communication with the second perforation and the third perforation, the cover including at least one through hole, the through hole being in communication with the first inlet and an external environment;
• and
• an operating unit including a pumping bag and a relief valve, the pumping bag being disposed on the base portion and covering the first one-way valve and the first perforation to form a first chamber, the relief valve being disposed on the base portion and covering the second one-way valve and the second perforation to form a second chamber.