At the bottom of the cup, there is a small and powerful air valve. With the help of air pressure, press the cup tightly on the table to take the cup, and force it obliquely upwards, and the air valve will automatically unlock without any difficulty.
It relies on its own gravity to squeeze out the air between it and the contact surface, and uses atmospheric pressure to increase the pressure between the contact surfaces to increase friction and prevent the placed objects from sliding. When in use, the smooth surface is downward, that is, glossy surface touches the instrument panel. There is a concave-convex texture, or the side of the text pattern is facing up.
Principle application
The principle of tumbler mechanics is widely used in people's production and life. The principle of "tumbler" not only brings fun to people in architectural design, toy manufacturing, daily necessities, automobile structural design, physical fitness, etc., but also makes full use of "objects are light and heavy, so they are more stable because of their low center of gravity", greatly improving the common tumbler toys, tumbler cups and tumbler sandbags in various facilities.
In terms of toys, daily necessities and sports equipment, a tumbler cup relates to a cup-shaped container, which is characterized in that the top is light and the bottom is heavy, the bottom is thickened into an arc shape, the weight is concentrated in the center of the bottom of the cup, and the bottom contact surface is small, so that the cup can shake when moving.