Patent ID: 7130439

Claim:
A rotary canister base, comprising: a body having a space for receiving a loudspeaker, two exhaling channels, an air inhaling channel, and a slot, wherein the slot has a closed end and an open end facing the inhaling channel; two valve pieces arranged at the opening of exhaling channels of the body; a loudspeaker system arranged in the space for receiving the loudspeaker, comprising a washer, the loudspeaker, and a loudspeaker cover; a stopper arranged at the slot of the body; an outer cover having a shape corresponding to that of the body and being connected to the body, and being provided with a plurality of holes at the position corresponding to the space of the body for receiving the loudspeaker, and being provided with a round channel at the position corresponding to the inhaling channel of the body, the outer cover being further provided with several apertures to be in communication with the exhaling channels on the body, and a slot being provided on the round channel wall; a drinking system for use as a drinking pipe protruding out from inside of the body, passing through the body and the outer cover, and when in use, one end of the drinking pipe being kept in the wearer's mouth and the other end connected to a canteen; and an air-intake pipe having one end connected to a canister and the other end plugged into the round channel of the outer cover, and being provided with several notches on a flange of the outside wall thereof, and allowing the stopper to pass through the slot on the round channel of the outer cover and to lock into the notches under the force of a spring.