PROBLEM TO BE SOLVED: To provide a tire air pressure alarm device for a vehicle capable of achieving enhancement of both of longevity and detection accuracy.SOLUTION: A tire air pressure alarm device 1 for a vehicle V comprises a wheel side unit 20, disposed inside a tire 4, including: a pressure sensor 21 for detecting a pressure of air in the tire 4; a temperature sensor 22 for detecting a temperature of the air in the tire 4; a power generating part 23 for converting energy associated with a rolling motion of the tire 4 to generate electric power; a power storage part 24 for storing electric power generated by the power generating part 23; and a transmission part 25 for transmitting information detected by the sensors 21 and 22 to a vehicle body side unit 10. The vehicle body side unit 10 has a case 26 covering a part of the air pressure sensor 21 and a part of the temperature sensor 22, the transmission part 25, the power generating part 23, and the power storage part 24. An engagement part 26f is provided in a side wall part 26c of the case 26, for preventing the vehicle body side unit 10 from dropping, in cooperation with an inner wall part 4a.SELECTED DRAWING: Figure 3
【課題】長寿命化と検出精度とを両立することができる車両のタイヤ空気圧警報装置を提供する。【解決手段】タイヤ4の空気圧力を検出する圧力センサ21と、タイヤ4の空気温度を検出する温度センサ22と、タイヤ4の転動に伴うエネルギを変換して発電する発電部23と、発電部23が発電した電力を蓄積する蓄電部24と、センサ21,22によって検出された情報を車体側ユニット10に送信する送信部25とを備えた車体側ユニット20がタイヤ4内部に配設された車両Vのタイヤ空気圧警報装置1において、車体側ユニット10が、圧力センサ21及び温度センサ22の一部と送信部25と発電部23と蓄電部24とを被覆するケース26を有し、ケース26の側壁部26cに、内壁部4aと協働して車体側ユニット10の落下を防止するための係合部26fを設けている。【選択図】 図3
TIRE AIR PRESSURE ALARM DEVICE FOR VEHICLE
車両のタイヤ空気圧警報装置
2017-09-07
Patent
Electronic Resource
Japanese
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