Patent ID: 8113246

Claim:
A vacuum fresh-keeping cover comprising an upper cover, an interior of which is provided with a container space, a top of which is connected to an air suction-ventilation device, and a lower rim of which is provided with a connecting part; a soft gasket, a side of which is provided with a connecting slot, with the connecting slot being air-tightly fitted into the connecting part and the soft gasket flexibly deforming downward in an air-tight condition, so as to be tightly suppressed on a surface; the air suction-ventilation device which is connected above the upper cover and is composed of a bottom air suction-ventilation hole being connected with the container space, a top touching element being able to displace up and down, an air suction pump, and a lower spring leaf and an upper spring leaf at a side of the air suction pump; and a barometric sensing element, a top of which is provided with a projected body being connected at the lower spring leaf, such that when a barometric value of the container space is detected high by the barometric sensing element, the barometric sensing element is driven by the high barometric value to be flexibly ascended and restored, so as to drive simultaneously the lower spring leaf to ascend to touch the upper spring leaf, thereby conducting an electric circuit to activate the air suction pump for drawing air inside the container space out of the upper cover through the air suction-ventilation hole, whereas, when the barometric value of the container space decreases, the barometric sensing element flexibly descending and displacing by an operation of a negative pressure in the container space, to drive the lower spring leaf to descend and displace, thereby forming an off-circuit condition by the upper and lower spring leaves to stop the air suction pump.