| 摘要 |
<P>PROBLEM TO BE SOLVED: To substantially reduce time and labor for determining whether a first structure and a second structure are in the predetermined relative position concerning the structures of the combination of the first and second structures, whether the two are in the predetermined relative position or they are not in the predetermined relative position by enabling the effects to be detected from a remote place contactlessly. <P>SOLUTION: When a cap B is fully screwed into a mouth of a bottle A, an electrode 2a, 2b and a conductive material 3 are in a state that they are in contact with each other. When an antenna 11 of an RF tag 1 receives a question wave (an electromagnetic wave for questioning that requests information) from an RF tag reader 4, a contactless detection circuit 16 recognizes that a connection part 16b-1 and a connection part 16b-2 are electrically connected through the conductive material 3. Conversely, when the cap B is loose, or removed from the bottle A, the detection circuit recognizes that the connection part 16b-1 and the connection part 16b-2 are not electrically connected through the conductive material 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
