With the gradual improvement of people's living conditions, the use of many household items has become more and more convenient, including the application of a lotion pump head. The lotion pump head, also known as the push type lotion pump head, is a liquid dispensing tool that uses the principle of an atmospheric pressure balance to eject the emulsion in the bottle by pressing, and can also add the outside atmosphere to the bottle. Next, I will talk about the working principle of the lotion pump head and its important functions and parameters.

　　When buying a product containing a lotion pump head, you should know that during the pressing process, you need to connect its head through it and drive the piston to use under the action of a compression spring. In the process of compressing the spring, the outer wall of the lotion pump head piston often opens the piston fully through the friction of the inner cavity wall, and the liquid appears in the discharge hole of the piston head. When the piston moves down, the air inside will be discharged from the piston head.

　　We can completely exhaust the air in the inner cavity by pressing repeatedly, then pressing the head with our hands, and then exhaust the air in the inner cavity through the action of the piston connecting rod and the compression spring. At this time, loosen the pressure head of the lotion pump head by hand, and the spring will lose its pressure and move down again. At this time, the piston moves downward by rubbing the inner wall to close the discharge hole.