KR880002491B1 - Alarm for preventing bruglars - Google Patents

Abstract

When the operation except for the purpose of purchase is applied to the product, the integrated circuit which is attached to the product is activated. The generation circuit of clock pulse (22) is required for driving the integrated circuit. The transmission signal generator (25) is used for the transmission of the central control device. The main control circuit (26), the switching relay circuit for sensing the robbery (27), the amplification and demodulation circuit (29), the decoding circuit of received information (30), the crystal oscillator (32) and the piezoelectric device (33) etc. are important components of the integrated circuit.

Description

Anti-theft information transmission and status check integrated circuit

1 is a circuit diagram of the present invention.

2 is an external view of an anti-theft device completed using the integrated circuit of the present invention.

3 is a block diagram showing internal elements of the antitheft device of FIG.

4 is a block diagram of the inside of a supermarket and a peripheral system of the anti-theft device showing an example of the use of the anti-theft device of FIG.

* Explanation of symbols for main parts of the drawings

23: alarm signal generating circuit 24: current amplification circuit

25: transmission signal generating circuit 26: main control circuit

27: contact element 30: reception information analysis circuit

33: pronunciation device 34: pin switch

35 pressure switch 36 movement switch

The present invention relates to a burglar alarm device, which is a compact integrated circuit which is attached to a product that is likely to be stolen, and which has an alarm for alarming when an operation other than the purchase purpose of the product is applied. It is about.

In order to protect valuables from theft in supermarkets, department stores or homes, security guards have conventionally monitored valuables.However, in the case of a large number of merchandise such as department stores, the number of items that can be monitored by security guards is not only limited. In recent years, due to labor costs associated with the hiring, the anti-theft device and theft alarm system have been preventing theft of goods.

An object of the present invention is to provide an integrated circuit having a cervical function to automatically transmit information in the event of theft to protect the article from theft.

It is another object of the present invention to provide an integrated anti-theft device that can be easily installed on a stolen item by providing a compact, anti-theft device, and to efficiently control a large number of theft items at the same time from a computer-controlled central control unit. To provide.

In order to achieve the above object, in the present invention, in order to detect the stolen state of the product, the current state of the product is detected by a pin, pressurization, and movement switch, and the alarm is detected as a pronunciation element at the same time as the occurrence of theft of the product by the detected signal It is characterized in that it comprises a transmitting and receiving circuit so as to generate sound and to perform integrated control by the central control device.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram of the present invention, where 22 is a clock generation circuit providing a clock necessary for driving the circuit of the present invention, 23 is an alarm signal generation circuit for generating an alarm sound in the event of theft, and 24 is an alarm signal. Current amplification circuit for amplifying the circuit, 25 is a transmission signal generating circuit for transmitting and receiving of the central controller, 26 is the main control circuit of the circuit of the present invention, 27 is a switch contact circuit for theft detection, 28 ) Is a current amplification circuit for transmission, 29 is an amplification and detection circuit for reception from the central control unit, 30 is a reception information analysis circuit, 31 is a power supply circuit for power supply, 32 is Crystal oscillator (33) is a piezo (PIEZO) pronunciation element, (34) pin switch, (35) pressure switch, (36) motion switch, (37) battery, (38) antenna .

The switches 34 and 35 and 36 are for detecting the state of the article, and the pin switch 34 is connected to the article and is connected when the anti-theft mechanism of the present invention is detached from the purchase purpose, and is pressed. The switch 35 is a thin film type switch attached to the outer case of the anti-theft mechanism when the force is applied to the case, and the motion switch 36 is a multi-contact switch configured in the outer case, and a metal bead is located therein. Make sure to connect when the case is moving.

Therefore, when an abnormal state of the article occurs by the switches 34, 35 and 36, the contact circuit 27 generates an electrical signal corresponding to the input signal and applies it to the main circuit 26, and at the same time the clock generating circuit ( 22) a driving signal is applied. The clock generation circuit 22 is connected to the crystal oscillator 32 and applies the clock signal to the transmission signal generation circuit 25 and the alarm signal generation circuit 23 only when a drive signal is applied from the contact circuit 27. In normal condition, it does not operate to prevent loss of power.

At this time, the main control circuit 26 applies an alarm on signal to the alarm signal generating circuit 23 by a signal input from the contact circuit 27, and the alarm signal generating circuit 23 is input from the main control circuit 26. By the alarm on signal, the clock signal applied from the clock generation circuit 32 is divided, converted into a frequency for driving the sound emitting element 33, and applied to the current amplifying circuit 24 so that an alarm is generated by the sounding element 33. Will occur.

At the same time, the transmission signal generating circuit 25 is a current amplifying circuit 28 and an antenna for external transmission by a drive signal applied from the clock generation circuit 22 and a clock signal and an ON control signal applied from the main control circuit 26. 38 transmits the current status as a specific frequency to the central control unit. Therefore, the transmission signal generation circuit 25 has a built-in frequency divider circuit for interfacing the clock signal input from the clock generation circuit 22 to generate a new frequency signal.

On the other hand, as the clock generation circuit 22 operates, the receiver amplification and detection circuit 29 switches to an operation state to receive a transmission signal from the central controller. The received input signal is amplified and detected and received. It is output to the information analysis circuit 30. The reception information analysis circuit 30 generates a clock signal input from the clock generation circuit 22 as a new clock signal by a built-in frequency divider circuit, and generates a command signal of the central control device input from the amplification and detection circuit 29. Stored in an internal register, the output signal of the register is interpreted as a decoder, and applied to the main control circuit 26 to sense which command signal is a signal transmitted from the central controller.

Therefore, the main control circuit 26 is the time applied from the state check signal of the switches 34, 35, 36 applied from the contact circuit 27, the alarm signal generating circuit 23 and the transmission signal generating circuit 25. The logical combination of the information signal and the command information of the central control unit applied from the reception information analysis circuit 30 transmits the current state to the central control unit through the transmission signal generation circuit 25, and particularly from the central control unit. It is configured as a logic circuit for controlling the alarm signal generating circuit 23 in accordance with the command signal to generate a signal for continuously driving or releasing the alarm state.

Therefore, when the user inputs an electric switch from the central controller while the alarm sound is generated from the sounding element 33 according to the status signals of the switches 34, 35 and 36, the amplification and detection circuit 29 transmits it. Detects the signal and decodes the command signal from the reception information analyzing circuit 30 and outputs the command signal to the main control circuit 26 to stop the operation of the return signal of the contact circuit 27 and the alarm signal generating circuit 23 from the main control circuit 26. Generate a signal.

2 is an outline view of an anti-theft mechanism manufactured in a small container so that the present invention integrated circuit as described above can be attached to a product that is likely to be stolen. (41) is a pin switch for attaching purpose and state check, (43) is a thin film type pressure switch installed in an outer case, and (44) is a multi-contact motion switch.

FIG. 3 shows the internal block for the purpose of showing the elements entering the interior of the antitheft device shown in FIG. 2, 45 is a small battery, and 46 is the alarm signal itself when the antitheft device of FIG. It is a sounding element used to make a sound (47) is an antenna coil used to wirelessly send a signal to the central control unit when the antitheft mechanism of FIG. 2 is needed and to receive a radio signal from the central control unit. Reference numeral 48 denotes a circuit board for interconnecting the (41)-(43) switches and (45)-(47).

4 shows an example of using the anti-theft device shown in FIG. 2, showing the inside of the supermarket and the anti-theft peripheral system, where 50 is a supermarket appearance and (1) is inside the supermarket. (2) an entrance (3) an alarm system controlled by a central control unit, (4) a central control unit receives radio signals from anti-theft devices and Is an antenna used to transmit a signal wirelessly at, and (5) is a checkout counter that calculates the price of the item to be purchased and packs the object, where a radio signal for releasing the alarm function of the anti-theft device is transmitted from the central control unit. (6) is sent to collect and reuse the anti-theft device attached to the object. A radio wave blocking device facility in order to prevent the moon. (7) is the room where the central control unit is installed, (8) is the central control unit, and (9) represents the warehouse for storing goods. (10) refers to a separate room, for example, a place where clothes can be changed, such as being inconspicuous from the outside for a while, and (11) represents an object on display.

As described above, by attaching a small anti-theft device and sending and receiving with the central control device that controls the entire area, there is an advantage of effectively preventing theft of goods by minimizing human and object loss.

Claims (1)

In the anti-theft device which detects the abnormal state of the attached goods and generates an alarm sound and is collectively controlled by the central control device, the pin switch 34 for detecting the attached state and the thin film type pressure switch 35 for the impact detection; A contact circuit 27 connected to the vibration multi-contact switch 36 for detecting an abnormal state signal of the switches 34, 35 and 36, and a transmission signal generating circuit 25 by an abnormal state generating signal. And an alarm drive signal generator circuit 23 for outputting an alarm sound through the clock generator circuit 22 for generating the drive signal and the system clock of the amplification and detection circuit 29, and the sounding device 33, A transmission signal generation circuit 25 for transmitting the current status information to the central control apparatus, a reception information analysis circuit 30 for generating an input signal of the main control circuit 26 by decoding the command signal received from the central control apparatus; , An abnormal phase of the contact circuit 27 Generates the alarm signal generation circuit 23 and the transmission signal by logically combining the central control command signal of the signal and the reception information analysis circuit 30 and the time information signal of the transmission signal generation circuit 25 and the alarm signal generation circuit 23. An anti-theft information transmission and emergency check integrated circuit comprising a main control circuit 26 for generating a drive control signal of the circuit 25.

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