JPS63122893U

JPS63122893U -

Info

Publication number: JPS63122893U
Application number: JP1465787U
Authority: JP
Priority date: 1987-02-03
Filing date: 1987-02-03
Publication date: 1988-08-10

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の構成を示す回路
図、第２図ａ，ｂ、第３図ａ，ｂ、及び第４図ａ
，ｂはウインド・コンパレータの構成及び出力特
性図、第５図はセンサ部の従来例を示す構成図で
ある。符号の説明、１……センサ部、２……判別部、
３……警報信号出力部、４……マグネツト、５…
…リードスイツチ、６……ウインド・コンパレー
タ、７……ラツチ回路、８……発振器、９……ス
ピーカ、１０，１１……比較器、１２……商品、
１３……凹部、１４……ＡＮＤゲート。 Fig. 1 is a circuit diagram showing the configuration of an embodiment of this invention, Fig. 2 a, b, Fig. 3 a, b, and Fig. 4 a.
, b are the configuration and output characteristic diagrams of the window comparator, and FIG. 5 is a configuration diagram showing a conventional example of the sensor section. Explanation of symbols, 1...Sensor section, 2...Discrimination section,
3... Alarm signal output section, 4... Magnet, 5...
... Reed switch, 6 ... Window comparator, 7 ... Latch circuit, 8 ... Oscillator, 9 ... Speaker, 10, 11 ... Comparator, 12 ... Product,
13... recess, 14... AND gate.

Claims

[Scope of utility model registration request]

It has a circuit in which a resistor of a predetermined value is connected in series with a magnet adhered to the product and a reed switch that detects movement of the magnet and opens, and has a recess that can accommodate the magnet. A predetermined reference voltage range is set that includes a sensor portion bonded on the product so as to cover the magnet, and a voltage value generated based on the current flowing through the resistor when the reed switch is closed, and the voltage value is An adhesive-type anti-theft device comprising: a discrimination section that outputs a command signal when the voltage falls outside the reference voltage range; and an alarm section that notifies the above by outputting the command signal.