| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively provide an electric power generating device having durability, and a tire pressure measuring device dispensing with battery exchange and having durability. SOLUTION: A metal wheel 261 is mounted rotatably on a wheel rotating shaft C2 fixed to a tire 3, and a hollow part 263 is provided so that a mass in the circumferential direction centered at the wheel rotating shaft C2 is biased. When the tire 3 is rotated, the metal wheel 261 is rotated around the wheel rotating shaft C2 so that a part A having a heavy mass is faced to the vertical downside. A coil 262 is fixed to the tire 3, Consequently, when the tire 3 is rotated, a relative position between the metal wheel 261 and the coil 262 is changed, and a magnetic flux ϕ generated in the coil 262 is changed, and the coil 262 generates power. COPYRIGHT: (C)2010,JPO&INPIT |
