Semi-rotary pump, self-mixing foaming device with semi-rotary pump and handwash basin with semi-rotary pump

The utility model discloses a semi-rotary pump, a self-mixing foaming device with the semi-rotary pump and a handwash basin with the semi-rotary pump. The semi-rotary pump comprises a support seat, arotating part, and a plunger, wherein a crank and rocker mechanism is arranged at the top of the support seat; the rotating part is arranged on the position, located below the crank and rocker mechanism, of the support seat, and a containing cavity penetrating through the rotating part in the radial direction of the rotating part is formed in the rotating part; the plunger is connected with the crank and rocker mechanism and partially inserted into the containing cavity, and the plunger and the containing cavity are arranged in a one-to-one correspondence mode; a suction inlet and an exhaust port are formed in the bottom of the support seat; and the crank and rocker mechanism is constructed to drive the plunger to do forward bowing and backward leaning movement while driving the plunger tomove up and down in the c