| 摘要 |
PROBLEM TO BE SOLVED: To obtain a data access device which is suitable for access to a data storage body that is used for large and small coexistence. SOLUTION: In a data access device which is provided with a coil unit 200 for electromagnetic induction connection and accesses a data storage body by communication through the unit 200, the unit 200 has circular transmitting coils S1 to S18, and circular receiving coils R1 to R84 which are diametrally smaller than the coils S1 to S18, plural coils R are arranged in a hexagonal close packed shape, and plural coils S are arranged in a matrix shape. Or, any of the coils S is arranged in accordance with a group of seven close packed coils R. |
