Quick opening and closing container stopper

A quick opening and closing container stopper, comprising:

• a fixed shell with a hollow inside, a movable stopper body being slidably connected in the fixed shell in a vertical direction, and the fixed shell being provided with a dodging opening, a bottom of the movable stopper body being provided with a limiting plate, an elastic sealing sleeve abutting against and between the limiting plate and the fixed shell, a knob being rotatably connected to the movable stopper body, the knob comprises a side lug, and the container stopper being switchable between a locked state and an unlocked state;
• in the locked state, the side lug extending beyond a contour range of the dodging opening, and the fixed shell and the limiting plate being close to each other and driving the elastic sealing sleeve to bulge outward;
• and
• in the unlocked state, the side lug being accommodated in the dodging opening, and the elastic sealing sleeve stretching while the fixed shell and the limiting plate are away from each other.