JPH03154198A - Burglar preventing machine and equipment used therefor - Google Patents

Abstract

PURPOSE:To prevent burglary without fail by generating a warn when prescribed time is passed after a detection signal from an optical sensor is changed from bright to dark or when the signal exceeds a prescribed frequency in the case that vibration is detected by a vibration sensor. CONSTITUTION:An entrance/exit, etc., at a place, where a burglar preventing machine 1 is always set up, is lighted up by turning on/off light with more than a prescribed frequency different from a commercial frequency. In the case that the vibration is detected by a vibration sensor 13, the burglar preventing machine 1 decides the burglar and generates the warn when the prescribed time is passed after it is detected by an optical sensor 5 that the light is changed from bright to dark, or when the light more than the fixed frequency is detected by the optical sensor 5. Then, the warn is also generated when a commodity 3 is pulled out from a clear case 2 by a microswitch 4. Thus, the robbery can be prevented without fail and an equipment to radiate strong electromagnetic waves is not required. Then, the machine is out of the adaptation of a wave low and a resonator to detect the electromagnetic waves is not required. Accordingly, the external form of the machine is made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an anti-theft machine that prevents theft of products, etc., and equipment for using the same, and particularly relates to an anti-theft machine that can reliably prevent theft and equipment for using the same.

[Conventional technology]

Conventional anti-theft equipment consists of anti-theft devices (
It generally consists of a tag) and equipment such as an electromagnetic wave emitter installed at a gate or the like to excite the tag. According to this anti-theft device, when a product with a tag attached passes through a gate, an alarm is issued, thereby preventing theft. Several types of anti-theft equipment are available.

The first type of anti-theft equipment has the following configuration. In other words, the tag attached to the product consists only of a resonator that also serves as an antenna, and the electromagnetic wave emitter installed at the gate can emit strong electromagnetic waves to excite the tag's resonator. , is configured to issue an alarm when a reflected wave from the tag is received.

According to the first type of anti-theft equipment, when a product passes through a gate, the tag resonates with the electromagnetic waves from the electromagnetic wave emitter and emits reflected waves.
The electromagnetic wave emitter receives the reflected wave and issues an alarm. This makes it possible to prevent products from being taken out without permission.

The second type of anti-theft equipment has the following configuration. In other words, the tag attached to the product consists of a resonator that also serves as an antenna, a receiver, and a sound generator, and the electromagnetic wave emitter installed at the gate simply emits strong electromagnetic waves to emit the tag. The resonator can be excited.

According to the second type of anti-theft equipment, when a product is carried through the gate, the resonator of the tag resonates due to electromagnetic waves from the electromagnetic wave emitter, which activates the receiver and activates the acoustic generator. When activated, the tag will generate sound. This makes it possible to prevent products from being taken out without permission.

The third type of anti-theft equipment has the following configuration. That is, a tag attached to a product consists of a resonator that also serves as an antenna, a receiver, and a transmitter. Further, an electromagnetic wave emitter installed at the gate emits strong electromagnetic waves to enable exciting the resonator of the tag. In addition, it is equipped with a radio wave detector.

According to the third type of anti-theft equipment, when a product is passed through the gate with the product, the resonator of the tag resonates due to the electromagnetic waves from the electromagnetic wave emitter. This causes the receiver to operate and the transmitter to operate. Therefore, electromagnetic waves will be emitted from the tag. By detecting this electromagnetic wave with a radio wave detector, unauthorized removal of products can be prevented.

(Problems to be Solved by the Invention) According to each of the above-mentioned anti-theft devices, the electromagnetic wave emitter installed near the gate causes the resonator of the tag to resonate.
It is necessary to emit strong electromagnetic waves. For this reason, it has the disadvantage that it does not comply with the standards of the revised radio laws and regulations.

Furthermore, according to the anti-theft equipment of each of the above methods, the tag needs to be equipped with an antenna that also serves as a resonator in order to receive electromagnetic waves, but the antenna cannot be miniaturized, so the entire tag is The disadvantage is that it cannot be miniaturized.

The present invention has been made to solve the above-mentioned drawbacks.
To provide an anti-theft device that eliminates the need for electromagnetic wave emission and can reliably prevent theft, and equipment for using the same.

(Means for Solving the Problems) In order to achieve the above object, the anti-theft device according to the present invention has the following features:
A light sensor that detects the brightness of light and converts it into an electrical signal,
A vibration sensor that detects vibration and converts it into an electrical signal, and a detection signal from the optical sensor and a detection signal from the vibration sensor are captured, and when vibration is detected by the detection signal from the vibration sensor, a signal is generated from the optical sensor. and an alarm circuit that issues an alarm when the detection signal exceeds a predetermined frequency.

Further, the antitheft device according to the present invention includes a light sensor that detects brightness and darkness of light and converts it into an electrical signal, a vibration sensor that detects vibration and converts it into an electrical signal, and a detection signal from the light sensor and the When vibration is detected by the detection signal from the vibration sensor, the detection signal from the optical sensor changes from bright to dark and a certain period of time elapses, or when the detection signal from the optical sensor is detected. It is characterized by comprising an alarm circuit that issues an alarm when the signal exceeds a predetermined frequency.

Furthermore, the equipment for use of the anti-theft device according to the present invention is that a lighting device capable of illuminating at a frequency higher than a predetermined frequency, which is not commercial frequency lighting, is installed at the entrance of the place where the anti-theft device is permanently installed. It is characterized by:

[Effect]

The anti-theft device of the present invention focuses on the fact that in the case of theft, the product must be taken out from the entrance and exit in one's possession, and that vibrations are generated to move the product when theft occurs, and when vibration is detected, the product is removed from the entrance and exit. Since the vehicle is illuminated with illumination of a predetermined frequency when passing through the area, the frequency of the detected light becomes higher than the predetermined frequency and an alarm is issued. In this way, theft is notified.

In addition, in the case of the above-mentioned invention, the anti-theft device is effective when the product is carried and moved under lighting, but of course it cannot be detected when the product is stored in a bag etc. Therefore, vibrations are detected. An alarm is issued when the detection signal from the optical sensor changes from bright to dark for a certain period of time, or when the frequency of the detected light is higher than a predetermined frequency. According to this, theft can be reliably prevented even if the product is carried and moved under illumination or stored in a bag or the like.

Furthermore, in order to execute the operation of the above-mentioned anti-theft device,
Entrances and exits of places where anti-theft devices are permanently installed were illuminated with flashing lights at a predetermined frequency or higher, which is different from the commercial frequency. This allows the anti-theft device to sound when the anti-theft device is taken out under lighting.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 to 9 are diagrams for explaining the present invention in detail.

Here, FIG. 1 is a perspective view showing an application example of the anti-theft device of the present invention, FIG. 2 is a perspective view of an embodiment of the anti-theft device, and FIG. 3 is a perspective view showing a vibration sensor used in the embodiment. 4 is a block diagram showing an example of the circuit configuration of the anti-theft device, and FIG.
The figure is a circuit diagram specifically showing the circuit configuration of the anti-theft device,
FIG. 6 is a perspective view showing the equipment used in the anti-theft device, and FIG. 7 is a block diagram showing the equipment used.

In Figure 1, a clear case 2 is placed on top of the anti-theft device 1.
is fixed, and a product 3 such as a compact disc (CD) can be stored inside the clear case 2. At the upper part of the anti-theft device 1 shown in the figure and inside the clear case 2, the operating section of the microswitch 4 is exposed. While the operation part of this microswitch 4 is pressed down by the product 3, the anti-theft device 1 does not issue an alarm, and conversely, when the product 3 is removed from the clear case 2, the anti-theft device 1 is in the anti-theft operation. At some point, an alarm will be issued. Further, an optical sensor 5 is provided on the side surface of the anti-theft device 1. Although not shown, there is a battery operation hole and a light sensor on the side opposite to the light sensor 5.
5 is provided.

FIG. 2 shows the arrangement of the main parts constituting the anti-theft device, and shows the side surface 7 of the upper short side of the rectangular case 6.
A light sensor 5 is provided on the side surface 8, and an operating portion of the microswitch 4 is exposed on the long side surface 8. The side surface 9 opposite to the short side surface 7 is provided with an operation hole 12 for inserting the button battery 10 into the battery holder 11 as shown by the arrow a in the figure and removing it as shown by the arrow in the figure. ing. Note that when the button battery 10 is inserted into the battery holder 11, the anti-theft device 1 becomes operational. Furthermore, an optical sensor 5 is provided next to the operation hole 12. A vibration sensor 13 is provided adjacent to the battery holder 11. Above this vibration sensor 13, an IC 14 for processing the operation is provided, and an electronic buzzer 15 for alarm is also provided.

FIG. 3 shows a detailed configuration of the vibration sensor 13 used in the anti-theft device 1, in which the vibration sensor 13 includes a movable body 16 that moves in response to vibration, and a detector that detects the movement of the movable body 16. It is composed of a body 17. The movable body 16 has a shaft 20 with one end of the rod-shaped body 18 planted in a base 19.
A conductive member 21 is provided at the other end of the rod-shaped body 18, and the rod-shaped body 18 is configured to be returned to a fixed position by a coil spring 22. Further, the detection body 17 has a stopper 23 formed in a U-shape made of a conductive member fixed onto an insulating plate 24 on the base 19, and a conductive member 21 loosely fitted into the U-shape of the stopper 23. At the same time, the upright pieces 25.25 of the stopper 23 touch the conductive member 2.
By positioning it at the rotation radius position of 1, it acts as a stopper and a detection electrode. In the vibration sensor 13, the conductive member 21 of the rod-shaped body 18 is connected to the stopper 2.
Vibrations can be electrically detected by contacting the upright pieces 25 and 25 of No. 3.

FIG. 4 is a block diagram showing an example of the circuit of the anti-theft device 1, which includes a microswitch 4 and a light sensor 5.
, a vibration sensor 13 , and an alarm circuit 30 . The optical sensor 5 has a structure capable of detecting the brightness of light and converting it into an electrical signal, and includes, for example, a photodiode, a phototransistor, a solar cell, and the like.

The vibration sensor 6 has a structure capable of detecting vibration and converting it into an electric signal, and for example, the structure shown in FIG. 3 is used. The vibration sensor 13 may be a mercury switch, a reed switch, or any other switch that can detect some kind of electrical signal in response to vibration.
Its composition does not matter. The microswitch 4 makes it possible to electrically detect that the product 3 has been taken out from the clear case 2. The alarm circuit 7 includes a signal processing circuit 31
and an electronic buzzer 15. The signal processing circuit 31 takes in the detection signal from the optical sensor 5, the detection signal from the vibration sensor 6, and the detection signal from the microswitch 4, and activates the electronic buzzer 15 under predetermined conditions.
It is designed to drive. The signal processing circuit 31 operates when vibration is detected by the vibration sensor 13,
An electronic buzzer 15 is sounded when a certain period of time has elapsed since the detection signal from the optical sensor 5 changed from bright to dark, or when the optical sensor 5 detected light of a certain frequency or higher different from the commercial frequency.

Although different from these conditions, the signal processing circuit 31
When the microswitch 4 detects that the product 3 has been removed from the clear case 2, it immediately sounds an electronic buzzer 15 to issue an alarm. In addition, once the signal processing circuit 31 sounds the electronic buzzer 15, the operation hole 1
2, operate the button battery 10 to turn off the power, or
The sound continues until the button battery 1O reaches its capacity.

FIG. 5 shows a specific example of the configuration of the signal processing circuit 31, which includes a vibration signal processing circuit 32 that processes the detection signal from the vibration sensor 13 and a detection signal from the optical sensor 5. A noise removal circuit 33 that removes frequency components higher than tz, a timer circuit 34 that outputs a signal when the output signal from the noise removal circuit 33 is present for a certain period of time, and a detection signal from the optical sensor 5 for example. A bypass filter 35 that extracts only signals with a frequency higher than H2, and a second timer that outputs a signal (“1”) when the signal output from the bypass filter 35 continues for a certain period of time (for example, 0.5 seconds). circuit 36 and a drive circuit 3 that takes in signals from the timer circuits 34 and 36 or the microswitch 4 and drives the electronic buzzer 15.
It consists of 7.

The vibration signal processing circuit 32 includes a transistor T. , a power switching circuit consisting of a resistor R0, a diode D0, a transistor T r +~Trx, and a diode D1.
~Dt, a capacitor C1, resistors R1 to R2, and an amplifier circuit Q, and a holding circuit that keeps the power switching circuit in an on state for a certain period of time.

The noise removal circuit 33 includes optical sensors 5, 5 and an input resistor R.
6, an amplifier circuit Q2 that takes in the photodetection signal from the connection point of the series circuit with 6, a resistor R1, and a capacitor C! , a diode D1, and an AND circuit Q, and a low-pass filter that cuts noise from the output signal from the amplifier circuit Q2.

The timer circuit 34 includes an input amplifying section composed of an input resistor Rm "" R9, a transistor T, a resistor R1, a diode D4, a capacitor C1, and an AND circuit Q.

If the input remains "1" even after a period of, for example, 3.5 seconds, an output is output from the AND circuit Q4.

The drive circuit 37 takes in the signal from the optical sensor 5 from the output of the amplifier circuit Q2 of the noise removal circuit 33, and the signal from the optical sensor 5 has a predetermined frequency (for example, 150Hz).
), a - signal (“1”) is output.

The second timer circuit 36 receives a signal (
“1”) continues for more than a certain period of time (0.5 seconds), “l”
” is output.

The drive circuit 37 includes an electronic buzzer switch circuit including an input resistor R+z, a drive transistor TFS, and a resistor R1!
~R14, a transistor T'ra, a diode D, and a holding circuit that maintains the electronic buzzer switch circuit in an on state.

Figure 6 shows the equipment used for the above-mentioned anti-theft AT.
A display shelf 41 is placed inside 0.

Inside this display shelf 41, there is an anti-theft machine l that stores the product 3.
are placed in large numbers. These products 3 are illuminated by fluorescent lamps 42 installed on the ceiling of a building 40 or the like. fluorescent light 4
2 is lit and driven by AC power at a commercial frequency. Furthermore, the entrance/exit 43 of the building 40 is illuminated with a large number of fluorescent lights 44 from the ceiling and sides. The lights are driven.

FIG. 7 shows a block diagram of the equipment used above. This inverter 45 is a commercial frequency alternating current (8C10
0V) is manually converted into high-frequency power of, for example, 1 kHz, and the fluorescent lamp 44 connected to the output 46 is driven to light.

The operation of the anti-theft device configured as described above will be explained with reference to FIGS. 1 to 10.

FIG. 8 shows an area illuminated by the fluorescent lamps in FIG. This is the area that is illuminated.

Further, FIG. 9 is a diagram simply showing the flow of the operation of the anti-theft device 1. As shown in FIG. 10(1) and (It) are time charts showing the operation of the anti-theft device 1. FIG.

First, if the anti-theft device 1 is placed in a stationary state, the vibration sensor 13 is off, so the transistor T,. is off. Therefore, the vibration signal processing circuit 32, the noise removal circuit 33, and the timer circuit 3
4 is not supplied with power from the button battery 10, so the circuit does not operate.

However, when the product 3 is removed from the clear case 2 of the anti-theft device 1, the micro switch 4 is turned on, and from then on, the resistance R
A holding circuit consisting of 1□ to R1, transistors T and 4, and diode D4 keeps the transistor TrS on. Therefore, the electronic buzzer 15 continues to emit a sound even if the product 3 is returned to the clear case 2 (see Fig. 9).
g), (f)).

Next, assume that the product 3 is stolen while it is stored in the clear case 2 of the anti-theft device 1. At this time, it is assumed that the product 3 is placed in a pocket of clothing, for example. In order to achieve such a state, when this vibration is detected by the vibration sensor 13, which usually accompanies vibration (Fig. 9 (a), Fig. 1θ (1
), transistor TP is turned on, and power is supplied from the button battery lO to the circuits below the vibration signal processing circuit 32. At the same time, the transistor Tr+ is turned on, and thereafter the vibration signal processing circuit 32 continues to output 1'' for a certain period of time (for example, 15 seconds here) from the time when the vibration sensor 13 is turned off. T1 is turned on, and then the transistor T is turned on, continuing to supply power to the vibration signal processing circuit 32 to the timer circuit 34 (Fig. 9 (6), 10).
In such a state, when light is detected by the optical sensor 5 (see FIG. 9(C)), the noise is removed from the detection signal by the noise removal circuit 33. (see FIG. 9(d)) and is supplied to the timer circuit 34, but since light is detected, the timer circuit 34 does not operate. However, when power is supplied in this way, When the light is blocked due to theft as described above, this is detected by the optical sensor 5 (see Fig. 9).
C), see Figure 1O (1) t+), when the dark state is detected for a certain period of time (3.5 seconds in Figure 10 (1)), the timer circuit 34 operates and the drive circuit 37 1″
(Figure 9 (e), Figure 10 (1) t
z). As a result, in the drive circuit 37, the transistor T is turned on, and then the transistor T r
4 is turned on, and thereafter the electronic buzzer 15 continues to sound regardless of the above-mentioned state (see FIG. 9(f) and FIG. 10(1) tz et seq.).

Furthermore, suppose that the product 3 is stolen while it is stored in the clear case 2 of the anti-theft device 1. At this time, product 3
For example, assume that it is exposed to light.

At this time, if this vibration, which normally accompanies vibration, is detected by the vibration sensor 13 (Fig. 9(a), Fig. 10(II))
T, see), transistor T,. is turned on, and power is supplied from the button battery 10 to the circuits below the vibration signal processing circuit 32. At the same time, the transistor T,1 is turned on, and thereafter, the vibration signal processing circuit 32 continues to output "l" for a certain period of time (for example, 15 seconds here) from the time when the vibration sensor 13 is turned off.

As a result, the transistor Tr! turns on, transistor TP0 turns on, and the vibration signal processing circuit 32
~ Power will continue to be supplied to the timer circuit 34 (
(See Figure 9(b) and Figure 10(II) T+)
When the optical sensor 5 is exposed to light in the area 49 with power being supplied in this manner (see FIG. 9(C)), the noise is removed from the detection signal by the noise removal circuit 33. Although the light is supplied to the timer circuit 34 (see FIG. 9(d)), since the light is detected, the timer circuit 34 does not operate.

Suppose that the person leaves the illumination area 49 toward the entrance/exit 43 in this state. Suppose then that the vehicle approaches the illumination area 50. At this time, the optical sensor 5 detects the light of the lighting driving fluorescent lamp 44 using 1 kHz AC power (see FIG. 9).
C), see FIG. 1θ (If) t++), then, during the period when the optical sensor 5 is detecting the light from the AC-lit fluorescent lamp 44, the bypass filter 35 outputs a signal “1”. (See Figure 9 (C), Figure 1θ (II) L)
, Here, if the output signal from the bypass filter 35 continues for a certain period of time (0.5 seconds in FIG. 10 (II)),
The second timer circuit 36 operates to supply the drive circuit 37 with
t+ (Figure 9 (1), Figure 10 (1)
) t lt), as a result, the drive circuit 37 turns on the transistor TrS, turns on the transistor Tra, and thereafter continues to sound the electronic buzzer 15 regardless of the above state (see FIG. 9( f),
(See Figure 10 (1) t+* onwards).

In this way, the present embodiment operates to notify theft etc. by sound.

As described above, the anti-theft Ill issues an alarm as a theft when the vibration sensor 13 detects vibration and the light changes from bright to dark using the optical sensor 5 and a certain period of time has elapsed. When vibration is detected by the optical sensor 13, an alarm is issued when the optical sensor 5 detects light exceeding a certain frequency, or an alarm is issued when the product 3 is removed from the clear case 2 by the microswitch 4. This makes it possible to reliably detect theft, eliminates the need for equipment that emits powerful electromagnetic waves, making it exempt from radio law, and eliminates the need for a resonator to detect electromagnetic waves, reducing the size of the device. be able to.

〔Effect of the invention〕

As described above, according to the present invention, when vibration is detected by the vibration sensor, an alarm is issued as a theft when the optical sensor detects light of a certain frequency or higher. It can be prevented.

Further, according to the present invention, when a vibration is detected by the vibration sensor, an alarm is issued as a theft when light of a certain frequency is detected, regardless of whether light is blocked or not. can prevent theft.

Furthermore, according to the equipment used in the present invention, since only a certain frequency is used for illumination, there is no need for equipment that emits strong electromagnetic waves, making it outside the scope of the Radio Law. No longer needed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a block diagram showing the entire embodiment, and FIG. 3 is a perspective view showing an example of a vibration sensor used in the embodiment of the present invention. FIG. 4 is a block diagram showing the overall electric circuit of the same embodiment, FIG. 5 is a circuit diagram showing a specific example of the circuit configuration, FIG. 6 is a perspective view showing an example of equipment used in the present invention, and FIG. A block diagram showing the electric circuit of the equipment used, Fig. 8 is an explanatory diagram of the lighting area, Fig. 9 is an explanatory diagram to explain the operation of the anti-theft machine, and Fig. 10 (
I) and (n) are time charts for explaining the operation of the anti-theft device. 1... Anti-theft device, 2... Clear case, 3...
Product, 4...Micro switch, 5...Light sensor
, 13... Vibration sensor, 30... Alarm circuit. Patent applicant Teio Tsushin Kogyo Co., Ltd.

Claims (3)

[Claims] (1) A light sensor that detects the brightness of light and converts it into an electrical signal, a vibration sensor that detects vibration and converts it into an electrical signal, and a detection signal from the light sensor and a detection signal from the vibration sensor. An anti-theft device comprising: an alarm circuit that issues an alarm when a detection signal from an optical sensor exceeds a predetermined frequency when vibration is detected by a detection signal from a vibration sensor. (2) A light sensor that detects the brightness of light and converts it into an electrical signal, a vibration sensor that detects vibration and converts it into an electrical signal, and a detection signal from the light sensor and a detection signal from the vibration sensor. When vibration is detected by the detection signal from the vibration sensor, the detection signal from the optical sensor changes from bright to dark and a certain period of time elapses, or the detection signal from the optical sensor exceeds a predetermined frequency. An anti-theft device characterized by comprising an alarm circuit that issues an alarm when the vehicle is stolen. (3) Equipment for use of the anti-theft device, characterized in that a lighting device capable of illuminating at a frequency higher than a predetermined frequency, rather than lighting at a commercial frequency, is installed at the entrance of the place where the anti-theft device is permanently installed. .