WRISTWATCH WITH BUILT-IN TAG

摘要

PROBLEM TO BE SOLVED: To build in an RFID tag having relatively high sensitivity while keeping a high-grade feel. SOLUTION: This wristwatch with a built-in tag is provided with; a watch case 12 having an annular frame 12a, a glass lid 12b and a back lid 12c; a drive part 13 housed in the watch case; an indication part 14 driven by the drive part for indicating a time; and the RFID tag 18 housed in the watch case and composed of an antenna 16 and an IC chip 17. The antenna 16 is provided with a magnetic base material 16a formed along the inside surface of the back lid, a pair of magnetic core members 16b erected on the magnetic base material so as to catch the drive part, and a series of coils 16c spirally wound around the pair of the magnetic core members. The magnetic base material may be formed in a ring-like shape insertable between the annular frame and the drive part, or in a circular arc-like shape along the inside surface of the annular frame. The magnetic base material and the pair of the magnetic core members are formed by injection-molding or compression-molding a composite material and preferably formed so as to have flexibility.