The physics of friction (similar to the tentacle sucker principle of geckos and octopuses).
At the bottom of the cup, there is a small but powerful air valve. With the help of air pressure, the cup is tightly pressed on the table to hold the cup, and the air valve will be automatically unlocked when the force is applied diagonally, so it will not feel strenuous.
It relies on its own attraction to extrude the air between the contact surfaces, and uses atmospheric pressure to increase the pressure between the contact surfaces to increase the frictional force and prevent the placed objects from slipping. When in use, the smooth side is facing down, that is, the smooth side is in contact with the instrument panel. The embossed, or text-patterned side is facing up.
The tumbler is a hollow shell and is very light in weight; the lower body is a solid hemisphere with a large weight, and the center of gravity of the tumbler is within the hemisphere. There is a contact point between the lower hemisphere and the support surface, and when the hemisphere rolls on the support surface, the position of the contact point changes.
A tumbler always stands on the support surface with one point of contact, it is always a monopod. Light and heavier objects are more stable, which means that the lower the center of gravity, the more stable it is. When the tumbler is balanced in an erect state, the distance between the center of gravity and the contact point is the smallest, that is, the center of gravity is the lowest. The center of gravity is always raised after a deviation from the equilibrium position. Therefore, the equilibrium of this state is a stable equilibrium. Therefore, no matter how the tumbler swings, it will not fall.
Post time: Jun-16-2022