| 摘要 |
PROBLEM TO BE SOLVED: To provide a merchandise theft monitoring device and installed unit capable of suppressing that a needle of a switch is pressed so that the needle does not move outward of an installed surface by a thin plate to be inserted between the installed unit and merchandise and raising an alarm before the needle is pressed by the thin plate. SOLUTION: The merchandise theft monitoring device is provided with the installed unit AU1 having a switch 3, a sleeve member 4 and a case 5. The switch 3 has the needle 31 energized outward of the case and a contact to be opened and closed according to a position of the needle. The sleeve member 4 has a sleeve part 4s to surround an end part of the movable element 31 when the installed unit is installed to the merchandise. The switch 3 and the sleeve member 4 are energized outward of the case and when the sleeve member 4 is pressed inward the case, the switch 3 moves in the same direction as the sleeve member 4. When the contact of the switch 3 is opened, the alarm is raised.
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