Tire pressure sensor

A tire pressure sensor installed on a tire rim, the tire rim comprising an assembly through hole;

• the tire pressure sensor comprising:
• a sensor body, comprising:
• a gas nozzle assembly hole;
• a tire pressure sensing module disposed in the sensor body for detecting a tire pressure, including a control unit which saves a firmware for controlling operation of the tire pressure sensing module;
• a first housing including an accommodating chamber to accommodate the tire pressure sensing module;
• a second housing engaging with the first housing to enclose the accommodating chamber;
• and
• an update connection port electrically connecting to the tire pressure sensing module, wherein the control unit receives an update firmware data through the update connection port for updating the firmware, the second housing comprises at least one perforation, and the update connection port comprises at least one conducting pin disposed in the accommodating chamber and corresponding to the perforation to transmit the update firmware data from outside to the control unit and the conducting pin has one end fixed on the first housing and the other end extended into the perforation;
• a gas intake nozzle, comprising:
• a coupling section inserted into the gas nozzle assembly hole;
• and
• a gas intake section connecting to the coupling section, penetrating through the assembly through hole, and extending towards a direction outside the tire rim for gas to input;
• and
• a gas nozzle assembly member, penetrating through the gas nozzle assembly hole to couple with the gas intake nozzle.