Patent ID: 7817024

Claim:
An air pressure sensor for a vehicle tire warning system, comprising: a tubular housing having a chamber defined therein, the chamber being communicated to the atmosphere via a connecting pipe; an air pressure actuating device suitably seated in the chamber and being moveable back and forth in the chamber in response to air pressure change in the vehicle tire; and a switch device adapted to electrically connect a high air pressure warning circuit or a low air pressure warning circuit under the drive of the air pressure actuating device; wherein the air pressure actuating device comprises a flexible pressure sensitive component for sensing the air pressure in the vehicle tire, a linkage mechanism assembled to the flexible pressure sensitive component, a supporting mechanism coupled to the tubular housing, and an elastic element between the supporting mechanism and the linkage mechanism, the flexible pressure sensitive component drives the linkage mechanism to move back and forth in the chamber in response to air pressure change in the vehicle tire; and wherein the supporting mechanism comprises a sleeve assembled to the tubular housing and a securing element engageably coupled to the sleeve, the securing element is provided with a through hole for suitably receiving the connecting pipe.