| 摘要 |
PROBLEM TO BE SOLVED: To obtain electric power needed for operation from the radio wave for electric power sent by a totalizer even when many dishes are stacked as to ID tags provided to dishes of a rotary sushi restaurant. SOLUTION: A core 29 is embedded in the rim 27 at the bottom of a dish 1, and a core 30 is embedded in a projection part 28 at the center part of the rim at the bottom of the dish and wound with an antenna coil 2 of an ID tag 4. When dishes 1 are stacked on a magnetic plastic mat 32, cores 29 and 30 of the dishes 1 and the mat 32 form a magnetic path, so electric power for operation can be obtained up to the ID tag 4 of a lower dish 1 with the electric power radio signal sent by the totalizer 14. |
