Telescopic automatic condom

A telescopic automatic condom is a sexual healthcare product for male pertaining to sexual healthcare device field, which attaches a rubber condom to the upper opening of a free-telescopic cup-shaped rubber bursa or cup-shaped plastic rib body with an air hole at the bottom. The air in the cup-shaped chamber is pumped out according to the vacuumizing principle, and the air hole at the cup bottom is plugged up to make the rubber condom clinging to the inner wall of the cup completely. People can open the air hole at the cup bottom when using, thus the rubber condom can contract and cover the penis by the elasticity of itself. If people stretch the cup repeatedly before opening the air hole at the cup bottom, as the cup is closed and free-telescopic, the air pressure inside the cup will vary during repeated stretching, thereby having erection-assistant and massaging effect to the penis. That is to say, the telescopic automatic condom is not only a condom, but also an erection assisting device.