First pressing: when the pressing head is pressed for the first time, the pressing head drives the auxiliary column to compress the spring together through the connected main column; In the process of compressing the spring, the outer wall of the piston causes the piston to open the discharge hole of the auxiliary column by friction with the inner cavity wall of the body; When the piston slides downward, the air in the body will be discharged through the opened auxiliary column discharge hole.
Press repeatedly: discharge all the air in the body.
Liquid absorption: press the pressing head by hand through the main column, the auxiliary column and the piston to jointly compress the spring to discharge the air in the body, and then release the pressing head. The spring will move back (up) due to the loss of pressure. At this time, the piston will also move down through the inner wall of the friction body to close the discharge hole of the auxiliary column; At this time, the liquid storage chamber in the body forms a vacuum suction state, sucking the glass ball upward, and sucking the liquid in the bottle into the liquid storage chamber of the body through the straw.
Storage of liquid: press the pressing head several times, and store the liquid to the body through multiple suction until the liquid is full.
Liquid discharge: when the liquid in the liquid storage chamber of the body is full, press the pressing head again to discharge the liquid directly from the pressing nozzle through the discharge hole.
