| 摘要 |
PURPOSE:To enable early puncture detection and prevent a tire from intentionally being damaged by detecting the air pressure in a tire tube with the use of a pressure switch and warning a driver of this. CONSTITUTION:An abnormal air pressure detection transmission device is comprised with a pressure switch 1, power supply 7, and transmitter Tx. When the air pressure in a tire tube 2 is reduced below preset pressure, a movable contact 4 makes contact to a fixed contact 3 and the data is radio-transmitted by the transmitter Tx. When the data is received, the abnormal air pressure of the tire is warned a driver of through illumination display, alarm, etc. Since early puncture detection is enabled by mounting this abnormal air pressure alarm device on each tire, the device is very convenient. In addition, even if a car tire is damaged intentionally during parking, a crime-preventive effect can be obtained because the device issues an alarm. |
