The dispenser is divided into two types: tie type and screw type. In terms of function, it is divided into spray, foundation cream, lotion pump head, aerosol valve, and vacuum bottle.

    The pump head uses the principle of pressing liquid suction, which is to use the movement of the piston to discharge the air existing in the storage liquid cylinder, resulting in internal and external air pressure so that the liquid rises under the action of air pressure and is discharged from the liquid outlet pipe to the outside of the pipe. .

    Some shampoo or body lotion pump heads will design a plastic buckle between the liquid outlet and the lower round cover at the beginning, which is used for fixing and preventing liquid leakage caused by the rotation of the pump head during transportation. . At this time, only after removing the plastic buckle, the pump head can be rotated. When the opened shampoo needs to be transported or moved, you can remove the pump head from the shampoo bottle, then press the pump head to the end, rotate the pump head in the opposite direction marked on the cap, and then screw the pump head back to the cap But this process requires a certain amount of effort. Finally, reinstall the pump head back into the bottle.