| 摘要 |
PROBLEM TO BE SOLVED: To provide a burglarproof tag, which does not change the resonance frequency of a resonance circuit section and does not make the Q-value of a coil section lowered, regardless of the material used for forming an object to be monitored to be burglar-proof. SOLUTION: A magnetic core member 11 of a burglarproof tag 10 is made of a composite material of a powder of flakes of a soft magnetic metal and a plastic, and a winding 12 is wound around the member 11. A capacitor 13 is housed in a recessed section 11a, formed in the member 11 and electrically connected to the winding 12. The member 11 is covered with a plastic covering body 14, together with the winding 12 and capacitor 13, and a through-hole 14a through which a flexible linear body is passed for hanging the tag 10 from an object to be monitored is bored through the covering body 14. |
