| 摘要 |
A tire pump includes a hollow barrel having an inside space, a pump plunger provided at a bottom end thereof with a pump piston that is slidably inserted into the inside space of the barrel for pumping air, an air tube connected to an end of the barrel, an air nozzle provided at an end of the air tube, a regulating chamber defined in between the barrel and the air nozzle and provided with a relief port, a regulating tube movable in the regulating chamber between a sealing position and a relief position, and an air whistle. The air whistle is mounted in the relief port for producing a sound when the regulating tube shifted to the relief position where a flow of air passes from the inside space of the barrel to the relief port through the regulating chamber.
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