| 摘要 |
A portable anti-theft alarm apparatus is provided to turn off an alert state automatically when a card of a user approaches and turn on an alert state when the card is separated apart and to control the generation of alarm sound automatically according to the position of the card. A portable anti-theft alarm apparatus(100) receives an ID(Identification) code and has a transmitting and receiving unit generating a code signal. The alarm apparatus is installed in a card(110) or various doors to generate alarm sound by detecting theft. The alarm apparatus has a main operator(120) judging whether the signal transmitted from the card corresponds to the code stored in advance and controlling the generation of alarm sound by detecting theft according to the distance from the card. The main operator comprises a body(130) having a detaching and attaching unit(132) installed on one surface to facilitate installation and a placing unit formed inside; a theft sensing unit(140) disposed at the placing unit to detect theft by sliding of a moving body(148) sticking out of the body and output detected data; an alarm generating unit formed in the body to generate alarm sound if the detected data is output from the theft sensing unit; and a main control unit formed in the body to judge whether the signal transmitted from the card corresponds to the code and recognize the distance from the card. The main control unit stops the operation of the theft sensing unit or the alarm generating unit if the distance is in a set distance range and allows the operation of the theft sensing unit or the alarm generating unit if out of the set distance range. |
