Cup

A cup, comprising:

• a cup body, wherein an interior of the cup body is hollow, and a top of an inner wall of the cup body is provided with a connecting piece;
• and
• a cup lid, wherein the cup lid is covered on the cup body;
• wherein the cup lid comprises:
• an inner layer cylinder,
• a sandwich cylinder, wherein the sandwich cylinder is sleeved on the inner layer cylinder,
• an outer layer cylinder, wherein the outer layer cylinder is sleeved and clamped on an upper portion of the sandwich cylinder,
• a first sealing ring with an elasticity, wherein the first sealing ring is sleeved on a lower portion of the sandwich cylinder,
• a sealing cap, wherein the sealing cap is detachably mounted at a bottom of the sandwich cylinder, and
• a cap shell, wherein the cap shell is covered to the outer layer cylinder and the cap shell is fixedly connected to the inner layer cylinder;
• a cylinder wall of the outer layer cylinder is provided with a connecting groove corresponding to the connecting piece;
• the connecting piece is clamped in the connecting groove, and the cup lid is opened or closed on the cup body;
• an inner wall of the sandwich cylinder is provided with a protruding block, and a cylinder wall of the inner layer cylinder is provided with an arc-shaped inclined groove corresponding to the protruding block;
• the protruding block is slidably disposed in the arc-shaped inclined groove, and the sandwich cylinder is clamped in the inner layer cylinder;
• the arc-shaped inclined groove comprises a first end portion and a second end portion, and a height of the first end portion is higher than a height of the second end portion;
• the sandwich cylinder moves up and down relative to the outer layer cylinder;
• a top of the first sealing ring is fixedly connected to a bottom of the outer layer cylinder, and a bottom of the first sealing ring is sandwiched and fixed between the bottom of the sandwich cylinder and the sealing cap;
• the sealing cap is mounted to or detached from the sandwich cylinder by rotating the sealing cap;
• wherein when the cup lid is covered on the cup body,
• the cup lid extends into the cup body,
• the connecting piece enters and is clamped in the connecting groove,
• the cap shell is rotated to drive the inner layer cylinder to rotate,
• the protruding block at the second end portion moves toward the first end portion,
• the sandwich cylinder drives the first sealing ring to move upward and squeezes the first sealing ring to bulge outward, and
• the first sealing ring is tightly attached to the inner wall of the cup body;
• and
• when the cup lid is screwed out of the cup body,
• the cap shell is rotated to drive the inner layer cylinder to rotate,
• the protruding block at the first end portion moves toward the second end portion,
• the sandwich cylinder drives the first sealing ring to move downward and decompresses the first sealing ring, and
• the first sealing ring moves away from the inner wall of the cup body to allow the cup lid to be pulled out of the cup body.