All-plastic single-material press pump

An all-plastic single-material press pump, comprising:

• a press head, a pump housing, a lock bottle cap, a locking cap, a pump rod, a spring, a one-way valve, a piston, and a dip tube made of a same plastic material,
• wherein the lock bottle cap is connected to an upper end of the pump housing in an inserted mode,
• the pump housing is provided with an upper pump chamber and a lower pump chamber,
• the locking cap is disposed between the upper pump chamber and the lower pump chamber,
• an upper end of the pump rod is fixedly inserted into the press head,
• the pump rod passes through the locking cap and extends into the lower pump chamber,
• the spring is disposed in the upper pump chamber,
• the pump rod is provided with a suction channel,
• a lower end of the pump rod is provided with a liquid inlet connecting the suction channel and the lower pump chamber,
• the piston is located in the lower pump chamber and is arranged around the pump rod to move up and down along with the pump rod,
• the one-way valve is located at a lower end of the lower pump chamber, and
• the dip tube is connected to a lower end of the pump housing in an inserted mode.