At the end of the 1990s, finger pressure foam pumps emerged in China. As the structural principle of finger pressure foam pump is similar to that of ordinary plastic pump head, some manufacturers who used to engage in plastic pump head initially intervened in the product development of finger pressure foam pump. After more than ten years of experience accumulation, the related product technology and production capacity has been greatly improved. Although some domestic enterprises producing finger-pressure foam pumps have made great progress, there is still much room for improvement in terms of product stability, production and R&D investment. Professional theoretical knowledge and technological innovation can not keep up with the single product variety, fierce competition in the industry, the lack of core patents, but also makes the product can not enter the international market, is not conducive to the long-term development of the industry.

　　Compared with domestic counterparts, foreign counterparts in technological innovation continues to progress. Starting from the early finger pressure foam pump, there are many innovations in the appearance and structure, each enterprise has formed its own core technology, which is represented by Korean and Japanese enterprises, in the daily packaging industry has a tendency to catch up with their counterparts in Europe and the United States. After the launch of finger pressure foam pump, won the favor of daily chemical brand manufacturers, achieved rapid market growth. Has been widely used in personal care, home cleaning, automotive products, pet supplies and other industries.

　　At present, the domestic finger pressure foam pump is widely used in the hand sanitizer industry. After the launch of magic foam hand sanitizer, it has been fully recognized by consumers for its practicality, convenience, simplicity, beautiful packaging, and effective reduction of secondary cross-infection. After seeing the huge market potential of foam hand sanitizer, other daily chemical brand manufacturers have launched their own foam hand sanitizer products. Shiatsu foam pump from the internal structure of the product is mainly divided into the following five parts:

　　1. Executive part: the function is to transfer the force to other parts inside the product by pressing the button, and to realize the foam pump's press rebound cycle and liquid discharge process through the spring. According to the shape of the head, it can be designed into different shapes and colors as needed.

　　2. Liquid chamber: The function is to squeeze out the liquid inside the liquid chamber during the pressing process of the indenter, and suck the liquid in the bottle into the liquid chamber when the indenter rebounds; in addition, the built-in spring in the liquid chamber plays the role of rebound.

　　3. Air Reservoir: Similar to the liquid reservoir, only the air is sucked in and squeezed out of the reservoir.

　　4. Suction tube: the liquid in the bottle and the whole pump connection part, is the liquid into the liquid storage chamber channel, to ensure that the liquid in the bottle can be quickly sprayed out to reduce the amount of liquid residue.

　　5. Gas-liquid mixing chamber: When the head is down-pressure, the liquid and air in the liquid storage chamber and the air storage chamber are fully mixed and pressurized in the gas-liquid mixing chamber, and fine foam is formed in the airflow mixing chamber through the dense mesh cloth.

　　The working principle of foam pumps seen on the market is basically the same. Compared with the traditional pump, the whole structure of the finger pressure foam pump is more complex, with air storage chamber. The pump is the core part of the whole product, which determines the liquid output, foam effect and stability.