What are the principles and design points of the lotion pump

The lotion pump, also known as the push-type lotion pump, is a liquid dispenser that uses the principle of atmospheric balance to pump out the liquid in the bottle by pressing, and replenish the external atmosphere into the bottle.
How the lotion pump head works
first press
When the pressing head is pressed for the first time, the pressing head drives the piston head to compress the spring together through the connected connecting rod; in the process of compressing the spring, the outer wall of the piston rubs against the inner cavity wall of the cylinder, which causes the piston to open the discharge hole of the piston head; the piston goes down When sliding, the air in the cylinder is discharged through the discharge hole of the piston head that has been opened.
Press back and forth
Press several times to exhaust all the air in the cylinder.
aspirate
Press the pressing head by hand to discharge the air in the cylinder through the connecting rod, the piston head, and the piston, and compress the spring together to discharge the air in the cylinder, then release the pressing head, the spring moves back (up) due to the loss of pressure, and the piston also rubs the inner wall of the cylinder at this time. Move down to close the discharge hole of the piston head. At this time, the liquid storage chamber in the cylinder forms a vacuum suction state, the ball valve is sucked up, and the liquid in the bottle is sucked into the cylinder liquid storage chamber through the straw.
Store the liquid Press the pressing head many times, and store the liquid in the cylinder through multiple suctions until the liquid is full.
When the liquid in the cylinder liquid storage chamber is full, press the pressing head again, and the liquid will be directly sprayed from the pressing nozzle of the pressing head through the discharge hole.
【Key points of seal design of lotion pump head】
The major manufacturers of emulsion pumps, in addition to controlling some main functions and parameters, will also add many additional functions according to different customer needs, as well as some new design features to attract the attention of end customers and form new Profit growth. Such as: the control of the opening torque of the pressing head, the control of the separation force between the pressing head and the piston rod, the rebound time of the pressing head, the anti-water ingress function, the anti-counterfeiting function, the spring external structure emulsion pump and so on.