To provide a tire air pressure measuring device which is separated from an air valve to prevent interference during mounting and simplify mounting work, and suppresses a moment applied to the air valve by a centrifugal force generated during traveling.
The tire air pressure measuring device 10 includes: a seat surface 14 coming into contact with an outer peripheral surface of a wheel rim 100 into which a pneumatic tire is mounted and having an air valve insertion hole to which the air valve 30 is inserted; a mounting surface coming into contact with a drop portion 100g of the outer peripheral surface of the rim 100; first and second storing parts 11, 12 which are respectively disposed on both sides of the seat surface 14 and protruded from the seat surface 14; an electronic device measuring the air pressure of the pneumatic tire and transmitting the air pressure information; and a flat-type battery driving the electronic device and having an electrolyte. The electronic device and the battery are stored in the first and second storing parts 11, 12, and a plate surface of the battery is parallel to the mounting surface.
SAEKI SETSUHIRO
TAIHEIYO KOGYO KK
Akira Shimoda
Kazuhiko Kurihara