| 摘要 |
PURPOSE:To easily detect the condition of a tire by forming a valve main body comprising a conductor by a plurality of conductors electrically insulated through an insulating portion formed by an insulator, and taking out the condition of the tire to the outside as an electric signal through the respective conductors. CONSTITUTION:A valve main body 1 comprising a conductor is formed by the first and second conductors 1A, 1B electrically insulated through an insulating portion 2 formed by an insulator. A pressure sensor 3 is fixed on the forward end side of the valve main body 1, and both sides of the pressure sensor 3 are respectively connected to the respective conductors 1A, 1B. On the other hand, a cap 4 for the valve main body 1 incorporates an electronic circuit 5, and plural signal lines 6, 7 of the electronic circuit 5 are respectively connected to the respective conductors 1A, 1B. In this arrangement, when the cap 4 is installed on the valve main body 1, the respective conductors 1A, 1B are used as lead wires, whereby a signal from the pressure sensor 3 is received by the electronic circuit 5, and the result is processed and displayed. |
