Water pump structure of oral irrigator with water leakage prevention function

The utility model discloses an oral irrigator water suction pump structure with a water leakage prevention function, and belongs to the technical field of oral irrigators. Comprising an outer shell, a pump body installed in the outer shell and provided with an inner cavity, a leakage-proof piston assembly movably connected with the inner cavity, a driving device installed in the outer shell and a leakage-proof soft rubber cup connected with the lower end of the pump body in a sealed mode. The upper end of the driving device penetrates through the sealing necking opening to be in transmission connection with the leakage-proof piston assembly, and the leakage-proof piston assembly is driven to move up and down periodically and repeatedly so as to spray water outwards from the upper end of the pump body. The first waterproof silica gel ring and the second waterproof silica gel ring are used for preventing water leakage of the inner wall and the outer wall of the inner sleeve, and the leakage-proof soft rubber cu