Tire pressure detecting device for e.g. automobile, has metallic conducting wire mounted in spiral manner in substrate around hole, where wire has internal end exposed to circumference wall of hole and electrically connected to end-cap

摘要

The device (10) has an inflation valve seat (14) made of electrically conductive material and connected to a pressure sensor (12). A transmitting antenna has an end-cap (161) made of metallic material and connected to the seat. An annular shaped substrate (162) defines a central coupling hole coupled with the end-cap, and a metallic conducting wire is mounted in a spiral manner in the substrate around the hole. The wire has an internal end exposed to a circumference wall of the hole and electrically connected to the end-cap. A cover (28) is made of plastic material and recovers the end-cap.