Water pump and oral irrigator

A water pump, comprising:

• a water pump assembly, a transmission assembly and a driving member connected in sequence;
• wherein
• the water pump assembly comprises a water pump housing, a piston is embedded in the water pump housing, and a connecting rod is provided at the piston;
• the transmission assembly comprises a first transmission seat, a first rotating wheel rotationally connected is provided in the first transmission seat, the first transmission seat is sleeved with a second transmission frame slidingly connected to the first transmission seat, the second transmission frame is configured to drive the connecting rod to perform linear motion, and a driven member is provided between the first rotating wheel and the second transmission frame;
• the driving member is configured to provide rotational power to the first rotating wheel and make the driven member drive the second transmission frame to perform linear motion, so as to make the water pump pump water or deliver water;
• and
• a gearbox is provided at one end of the driving member, a driving gear is provided on an output shaft of the driving member, a driven gear is fixedly provided at one end of the first rotating wheel, an interior of the gearbox is sequentially provided with a first transmission gear, a second transmission gear and a third transmission gear that mesh with each other, the driving gear is configured to mesh with the first transmission gear, and the driven gear is configured to mesh with the third transmission gear.