Vacuum bottle sealing apparatus

1. A vacuum bottle sealing apparatus comprising:

a lower unit disposed in an opening of a bottle;

an upper unit installed on an upper portion of the lower unit; and

a lifting and lowering unit disposed to pass through the lower unit and to protrude inwardly of the upper unit from inside of the opening of the bottle,

wherein the lifting and lowering unit includes a lifting and lowering bar connected to the upper unit through the lower unit and lifted and lowered by the upper unit, and an elastic sealing ring mounted on an outer circumferential surface of the lifting and lowering bar and sealing an interior of the opening of the bottle as the elastic sealing ring is pressed by the lower unit and then deformed when the lifting and lowering bar is lifted; and

the lifting and lowering unit and the upper unit are provided with an air discharge passage formed therethrough, and by the rotation of the upper unit the lifting and lowering unit is lifted with the elastic sealing ring being lifted accordingly, so that the elastic sealing ring is pressed by the lower unit and is laterally expanded and deformed to block the gap between the inner side of the inlet of the bottle and the lifting and lowering bar, the space between the inside of the bottle and the air discharge passage being blocked.

2. The vacuum bottle sealing apparatus of claim 1 , wherein the upper unit comprises a bar hole formed therein to which the lifting and lowering bar is screw-fastened, and the lifting and lowering bar is lifted and lowered along the bar hole according to rotation of the upper unit.

3. The vacuum bottle sealing apparatus of claim 2 , wherein the lifting and lowering bar is provided with a key groove formed in an outer surface of the lifting and lowering bar, and the lower unit is provided with a key, the key being formed on an inner surface of a lifting and lowering through-hole of the lower unit and being insertedly disposed in the key groove, to block rotation of the lifting and lowering bar when the upper unit is rotated.

4. The vacuum bottle sealing apparatus of claim 2 , wherein the lifting and lowering bar comprises a connection flow path connecting an interior of the bottle to the bar hole, and the air discharge passage is a path connecting the connection flow path to the bar hole.

5. The vacuum bottle sealing apparatus of claim 4 , wherein the connection flow path comprises an air hole formed in a lateral surface of an insertion portion protruding downwardly to be inserted into the opening of the bottle in the lower unit, and a key groove formed in an outer surface of the lifting and lowering bar to lead to the air hole.

6. The vacuum bottle sealing apparatus of claim 4 , wherein the connection flow path comprises a discharge groove formed in an upper surface of a supporting protrusion supporting the elastic sealing ring in the lifting and lowering bar, and a discharge hole communicating with the discharge groove and connected to an upper end of the lifting and lowering bar inside the lifting and lowering bar.

7. The vacuum bottle sealing apparatus of claim 2 , further comprising:

a sub-sealing unit maintaining a vacuum, when air is discharged through the air discharge passage to form the vacuum inside the bottle;

wherein the sub-sealing unit includes a check valve mounted on an upper portion of the bar hole of the upper unit.

8. The vacuum bottle sealing apparatus of claim 7 , wherein the upper unit is provided with a fastening protrusion protruding from a lateral portion of the upper unit in the upper portion of the bar hole,

the check valve is provided as an I-shaped member, and has an upper portion and a lower portion caught by and fastened to an upper end and a lower end of the fastening protrusion, respectively,

a distance between an upper end and a lower end of the check valve is greater than a distance between the upper end and the lower end of the fastening protrusion, and

the upper portion of the check valve has a size covering the upper end of the fastening protrusion, and the lower portion of the check valve has a size not to cover the lower end of the fastening protrusion.

9. The vacuum bottle sealing apparatus of claim 7 , wherein the sub-sealing unit further comprises an elastic plate mounted in a location in which the elastic plate is in contact with the opening of the bottle in the lower unit, and an O-ring mounted on one of the lower unit and the upper unit to be disposed in a fastening part of the lower unit and the upper unit.