Pump head and container with pump head

A pump head comprising a shell body, wherein a suction chamber is provided in the shell body and unidirectionally in communication with an outside;

• a piston body is slidably mounted in the suction chamber;
• a pump nozzle is slidably mounted on the shell body and connected with the piston body;
• a one-way valve is provided on the piston body;
• the piston body and the pump nozzle are configured to move together to squeeze a material in the suction chamber so that the material is pumped out via the one-way valve and the pump nozzle;
• a squeezing opening is provided on the piston body and is in communication with the pump nozzle;
• the one-way valve is configured to close the squeezing opening;
• a side surface of the piston body for squeezing the material in the suction chamber is configured as a squeezing surface, and the squeezing surface is inclined from a position away from the squeezing opening toward a position close to the squeezing opening;
• wherein the one-way valve comprises a mounting part fixed on the piston body, an arm portion extends from the mounting part towards the squeezing opening and connects with a shielding part, the shielding part is made of an elastic material and is configured to close the squeezing opening, and the piston body and the pump nozzle are configured to move together to squeeze the material in the suction chamber so that the shielding part is elastically deformed due to squeezing of the material to open the squeezing opening;
• wherein the arm portion is made of the elastic material, the arm portion comprises a rear arm integrated with the mounting part and a front arm integrated with the shielding part, and the rear arm and the front arm are integrated with each other in a misaligned manner;
• wherein a torsion node connects the front arm and the rear arm, and an arm thickness of the front arm is smaller than an arm thickness of the rear arm.