Waterproof smart watch

1. A waterproof smart watch, comprising: a hollow watch case; a cell phone core mounted inside the watch case; a through-hole provided on a lateral side of the watch case and in communication with a microphone of the cell phone core; an adjusting knob rotatably mounted at the lateral side of the watch case, a communication aperture being provided on the adjusting knob and in communication with the through-hole; and a sealing pad provided between the adjusting knob and the watch case, a small hole being provided on the sealing pad and in communication with the through-hole, wherein when the adjusting knob rotates to a position, the communication aperture, the small hole and the through-hole are in communication with one another successively, and further rotation of the adjusting knob renders the communication aperture and the through-hole being sealed and separated by the sealing pad;

wherein an installation opening is provided on the lateral side of the watch case, and a circular tube is installed inside the installation opening, a center of the circular tube being provided with a stepped bore, wherein a large bore of the stepped bore is facing inwards and provided therein with a spring, and a bolt passes through and compresses the spring; the bolt extends from a small bore of the stepped bore and couples with a shaft of the adjusting knob after passing through the sealing pad, the through-hole being provided on the circular tube.

2. The waterproof smart watch as claimed in claim 1 , wherein at least two sets of indentations are provided on the lateral side of the watch case surrounding the installation opening, and the adjusting knob is provided with projections that are engageable with one set of the indentations, and when the adjusting knob rotates such that the communication aperture, the small hole and the through-hole are in communication with one another successively, the projections snap into one set of the indentations; and when the adjusting knob rotates such that the communication aperture and the through-hole are sealed and separated by the sealing pad, the projections snap into another set of the indentations.

3. The waterproof smart watch as claimed in claim 1 , wherein the adjusting knob is provided with a space facing the watch case and surrounding a portion of the circular tube that exposes out from the watch case.

4. The waterproof smart watch as claimed in claim 1 , wherein a waterproof membrane covering the through-hole is provided inside the watch case.

5. The waterproof smart watch as claimed in claim 1 , wherein an upper sealing cover of the watch case is provided with a transparent watch cover, and a lower sealing cover of the watch case is provided with a bottom cover.

6. The waterproof smart watch as claimed in claim 1 , wherein a slot is provided on an outer end of the adjusting knob.

7. The waterproof smart watch as claimed in claim 1 , wherein the adjusting knob is resiliently pressed against a surface of the sealing pad.

8. The waterproof smart watch as claimed in claim 1 , wherein the adjusting knob is provided with “OPEN” and “LOCK” patterns, and when the communication aperture, the small hole and the through-hole are in communication with one another successively, the “OPEN” pattern is in an upright position and the “LOCK” pattern is in a toppled position; and when the communication aperture and the through-hole are sealed and separated by the sealing pad, the “LOCK” pattern is in an upright position and the “OPEN” pattern is in a toppled position.

9. The waterproof smart watch as claimed in claim 2 , wherein the indentations comprise two sets of perpendicularly disposed indentations, and each set comprises two axially symmetric indentations.