Improved bottle cap

Abstract

An improved bottle cap includes a cap body, an inner stopper, and a safety ring. The cap body includes a cap top and an annular sidewall extending downwards from below the periphery of the cap top to cover the bottle opening. The inner stopper is disposed on the inner surface of the cap top and extends downwards to fit against the inner wall of the bottle opening, wherein the length of the inner stopper extending downwards from the cap top is 10 mm. The safety ring is connected to the bottom end of the annular sidewall. Therefore, this invention improves the sealing performance under high-temperature sterilization conditions, ensuring that the cap remains tightly sealed and close to the bottle opening during high-temperature sterilization, effectively preventing liquid leakage.

Claims

1. An improved bottle cap for covering a bottle opening, the improved bottle cap comprising: A cap body includes a cap top and an annular sidewall extending downward from below the periphery of the cap top to cover the bottle opening; an inner stopper cap disposed on the inner surface of the cap top and extending downward, forming an annular receiving space between the inner stopper cap and the annular sidewall to serve as a bottle opening receiving portion, and fitting the inner stopper cap against the inner wall of the bottle opening, wherein the length of the inner stopper cap extending downward from the cap top is 10 mm; and a safety ring connected to the bottom end of the annular sidewall.

2. The improved bottle cap as described in claim 1, wherein, The top surface of the cover is concave from the outer periphery toward the center to form a ring-shaped depression, which extends to the center and bulges upward to form a central protrusion.

3. The improved bottle cap as described in claim 2, wherein, The center of the central protrusion is recessed to form an arc-shaped depression.

4. The improved bottle cap as described in claim 1, wherein, The bottom of the annular sidewall is provided with a plurality of bridging portions between the bottom end of the annular sidewall and the top end of the safety ring, with the two ends of the bridging portions connecting the bottom end of the annular sidewall and the top end of the safety ring, respectively.

5. The improved bottle cap as described in claim 4, wherein, The first width of each bridging part connecting to the annular sidewall is smaller than the second width of each bridging part connecting to the safety ring.

6. The improved bottle cap as described in claim 4, wherein, The annular sidewall has a protrusion between two adjacent bridging portions, and the safety ring has a recess between two adjacent bridging portions, with the outer contour of the protrusion corresponding to the outer contour of the recess.

7. The improved bottle cap as described in claim 6, wherein, The protrusion is a triangular protrusion or a quadrilateral protrusion with a slant on one side.

8. The improved bottle cap as described in claim 4, wherein, The inner wall of the safety ring is provided with a plurality of positioning protrusions, which are horizontally protruding inward.

9. The improved bottle cap as described in claim 8, wherein, The outline of the plurality of positioning bumps is a triangular geometry with acute angles or arcs.

10. The improved bottle cap as described in claim 8, wherein, Each positioning protrusion is located below the corresponding bridging part.

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