Transmission apparatus for transmitting information concerning a condition of the tire, tire assembly and tire condition monitoring system

摘要

A transmitting device of a tire condition monitoring system includes: a sensor that detects, as tire information, the state of a gas filled in a tire cavity, a transmitter that transmits the detected tire information by radio, and a housing that covers the sensor and the transmitter. It is an opening that connects an inner space within the housing and the tire cavity, provided in the surface of the housing, and the opening is provided so that it extends on the surface of the housing, while the shape of a straight line, a curved Line or a combination of a straight line and a curved line forms. The maximum value of the opening width orthogonal to the direction in which the opening extends is 0.8 mm or less. Even if a flat tire is repaired by a tire puncture sealant, tire information such as tire pressure information can be properly measured and detected by this transmission device.