PROBLEM TO BE SOLVED: To provide a small interrogator capable of miniaturizing so as to be stored in a built-in box and hardly receiving influence of an electronic device stored in the built-in box.;SOLUTION: The interrogator 10 has a mounting board 11 to be mounted on the existing built-in box, an antenna 12 for the interrogator is arranged at a front side of the mounting board 11, and a circuit board 31 for the interrogator and a control board 41 both arranged at the back side. The mounting board 11 is formed by adjusting to the size of the existing built-in box, and an opening 13 is arranged at the center of the mounting board 11. Screw holes 15a, 15b for mounting a plate are formed at an upper side and a lower side of the center of the mounting board 11, long holes 16a, 16b for mounting the box are arranged inside the screw holes. When the interrogator 10 is stored in the built-in box, the antenna 12 for the interrogator is stored together with the mounting board 11 between the built-in box and the plate, and the circuit board 31 for the interrogator and the control board 41 are stored in the built-in box.;COPYRIGHT: (C)2009,JPO&INPIT
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