JPH0636155A - Light collecting structure of burglar preventing machine - Google Patents

Abstract

PURPOSE:To provide the light collecting structure of a burglar preventing machine by concentrating light projected from the outside on an optical sensor and being capable of maintaining its surface as it is flat without exposing the optical sensor to the outside. CONSTITUTION:In a burglar preventing machine A having an optical sensor 5 detecting contrast of light and converting it into an electric signal and detecting a burglar by contrast of light, at least a part of the envelope 1 of this burglar preventing machine A is formed with a high molecular resin material which having excellent transparency and a high reflectance, a recessed part is drilled at the inside of the part formed with this high molecular resin material and an optical sensor 5 is inserted in this recessed part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device for preventing theft of goods or the like, and more particularly to a light-collecting structure for an anti-theft device which can reliably collect light and does not expose an optical sensor to the outside. It is about.

[0002]

2. Description of the Related Art A conventional anti-theft system includes an anti-theft device (tag) to be attached to a product and an exciting device such as an electromagnetic wave emitting device for exciting the tag, which is installed at the entrance and exit of an exhibition site for the product. It is generally composed of According to such an anti-theft system, when a product with the tag attached is passed through a doorway or the like where an exciter is installed, the tag is excited by electromagnetic waves and an alarm is issued. Can be prevented. There are several types of anti-theft systems provided.

The first type of anti-theft system is a tag which is composed of a resonator which doubles as an antenna and is installed at the entrance and exit of a product exhibition space. It emits a strong electromagnetic wave during the anti-theft operation and a reflected wave from the tag. And an excitation alarm device that issues an alarm when the signal is received. According to the anti-theft system of the first method, when the product passes through the gate, the tag resonates with the electromagnetic wave from the excitation warning device and emits a reflected wave. Receive and give an alarm. This can prevent the product from being taken out without permission.

The antitheft system of the second type is composed of a tag having a resonator also serving as an antenna, a receiver, and a sound generator, and an exciting device that simply emits a strong electromagnetic wave. According to the anti-theft system of the second method, when a product is carried through an entrance / exit, the resonator of the tag resonates due to the electromagnetic waves from the exciter, whereby the receiver in the tag operates and the sound generator. The sound is generated from the tag by activating. This can prevent the product from being taken out without permission.

The antitheft system of the third method is a tag having a resonator also serving as an antenna, a receiver, and a transmitter,
It consists of an exciter that emits strong electromagnetic waves and a radio wave detector. According to the anti-theft system of the third method, when the product is passed through the gate, the electromagnetic wave from the exciter causes the tag resonator to resonate. 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, it is possible to prevent the product from being taken out without permission.

According to the antitheft system of each of the above-mentioned methods, the exciter installed near the entrance / exit needs to reliably resonate the resonator of the tag, and therefore needs to emit a strong electromagnetic wave. For this reason, there is a drawback in that the standard is not met due to the revision of the radio law. Further, according to the antitheft system of each of the above methods, the tag needs to be provided with an antenna that also serves as a resonator in order to receive electromagnetic waves, but the antenna cannot be miniaturized.
Therefore, there is a drawback that the entire tag cannot be downsized.

As described above, since the conventional anti-theft devices have their respective drawbacks, the anti-theft devices which detect the change of light and darkness of the light and the change of vibration and self-determine that there is the theft and give an alarm are also provided. Has been developed. This new anti-theft device is disclosed, for example, in Japanese Patent Application No. 74397/1989, Japanese Patent Application No. 1/29.
No. 3198, Japanese Patent Application 1st Year 293197, Japanese Patent Application 3rd Year 1
No. 90686 and the like. In such an anti-theft device, when the product is stolen, the product is moved and vibrates, and moreover, the product is stored in a bag or bag, and it detects that there is a change in the light and darkness of the light, and It was possible to issue an alarm with a buzzer, etc., judging that the theft had occurred. For this reason, the newly proposed anti-theft device always needs an optical sensor such as a photodiode for detecting a change in light.
However, in order for the optical sensor to judge the change in the external illuminance, the head of the optical sensor had to be exposed from the device or the box.

If the head of this optical sensor is projected from the side surface of the device, not only does the appearance look bad, but the thief also knows that the function of the protective device is stored. Therefore, it may be considered that the optical sensor is housed inside the device, but the light amount of the light applied to the optical sensor is reduced, which causes a decrease in sensitivity. Therefore, there has been a demand for a light-collecting device for an anti-theft device, in which the head of the optical sensor does not protrude to the outside and the illuminance can be accurately detected.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and a part of the outer circumference of an anti-theft machine is formed of a material having a high light-transmitting property and a high reflectance. It is an object of the present invention to provide a light-collecting device for an anti-theft device, which has a structure in which a recess is bored inside the outer envelope and an optical sensor is inserted into the recess.

[0011]

According to the present invention, there is provided an anti-theft device having an optical sensor for detecting light and dark of light and converting it into an electric signal and detecting theft by light and dark of light. At least a part of the enclosure is made of a polymer resin material having a high light-transmitting property and a high refractive index, and a concave portion is formed inside the portion formed of the light-transmitting material, and an optical sensor is inserted into the concave portion. .

[0012]

In the anti-theft device according to the present invention, the light from the outside is absorbed by the light-transmitting envelope, and the light entering the inside is reflected by the front and back surfaces and collected in the recess. Light will be emitted. Therefore, the light in the concave portion is amplified and shines brightly, and the change in light and darkness of the light by the optical sensor can be reliably detected with high sensitivity.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 7 are views for explaining an embodiment of an anti-theft machine A used in the anti-theft system of the present invention.

Here, FIG. 1 is a perspective view showing an application example of the antitheft machine A of the present invention, FIG. 2 is an exploded perspective view showing an operating mechanism of the antitheft machine A, and FIG. 3 is an optical sensor and a frame. 4 is a cross-sectional view showing the positional relationship of the body, FIG. 4 is an explanatory view showing a path through which light from the outside reaches an optical sensor, FIG. 5 is a perspective view of an embodiment of the antitheft device A, and FIG. FIG. 7 is a perspective view showing a vibration sensor to be used, FIG. 7 is a block diagram showing a circuit configuration example of the anti-theft device A, and FIG. 5 is a circuit diagram specifically showing a circuit configuration of the anti-theft device A.

In FIG. 1, the anti-theft device A comprises a frame 1 accommodating functional members such as an electric circuit, and a clear case 2 connected to the upper portion of the frame 1, and the inside of the clear case 2 is shown. For example, compact disc (CD)
Items such as 3 can be stored. At the upper part of the frame body 1 in the figure and in the center of the inside of the clear case 2, the operation portion of the extraction prevention switch 4 formed of a micro switch is exposed. The operation part of this removal prevention switch 4 is the product 3
The anti-theft device A does not give an alarm while it is being pressed by, and conversely gives an alarm when the anti-theft device A is in the anti-theft operation when the product 3 is removed from the clear case 2. Further, the frame 1 is formed of a polymer resin material having high transparency and a high refractive index, for example, an organic compound such as acrylic styrene or polycarbonate,
It is made of a material that can absorb light from the outside and reflect it internally. An optical sensor 5 is housed inside the short side of the frame 1, and the optical sensor 5 allows the frame 1
It is designed to sense the light emitted to the surface of the. In addition, another optical sensor 5 is installed, as shown in FIG.
An optical sensor 5 is also provided on the short side on the back side of, and a battery operation hole for controlling the operation is also provided on the back side at the same time.

FIG. 2 shows the structure of the detecting and operating parts of the anti-theft device A. The frame 1 has a rectangular shape with upper and lower openings, and as described above, it has high transparency and a high refractive index. The high polymer resin material is integrally formed as a whole. A bottom plate 7 having a flat plate shape is combined with the lower opening of the frame body 1 so as to be in close contact therewith, and a structure for housing a three-dimensional electric circuit, a sensor, etc. is formed by the frame body 1 and the bottom plate 7. Has been done. Coupling columns 8 are projected at the four corners of the bottom plate 7, and the coupling columns 8 are fitted into the four corners of the inner periphery of the frame 1 to make the frame 1
And the bottom plate 7 are firmly connected. A concave-shaped light collecting hole 6 is formed in the center of the front and rear short sides of the frame 1. The head of the optical sensor 5 is inserted into each of the light collecting holes 6, and the head of the optical sensor 5 has a function of reacting to light and converting into an electric signal. Further, in the rear portion of the frame body 1 (on the front side in FIG. 2), a groove-shaped operation groove 9 is cut out at the lower part of the light collecting hole 6. After the frame 1 and the bottom plate 7 are combined, an instrument is inserted from the operation groove 9 to insert the button battery 10 housed in the bottom plate 7 into the battery holder 11 as shown by an arrow a in the drawing. It can be detached as shown by an arrow b. When the button battery 10 is inserted into the battery holder 11, the anti-theft device A is activated. A vibration sensor 13 is provided in the vicinity of the battery holder 11, and a circuit body 14 for processing the detection and judgment of the theft by the anti-theft device A is provided on the opposite side of the vibration sensor 13. A warning buzzer 15 is provided.

Next, FIG. 3 shows the positional relationship between the optical sensor 5 and the light collecting hole 6 by cutting the frame 1 in the horizontal direction. A semicircular condensing hole 6 is formed in the center of each of the short sides of the frame body 1, and only the head of the optical sensor 5 is fitted into the condensing hole 6. Since the frame 1 is integrally formed, no joints or steps are formed at the peripheral edge.

Further, FIG. 4 schematically shows a light transmission path in the vicinity of the light collecting hole 6. in this case,
The light F incident on the frame 1 from the outside is reflected on the surface and the inner peripheral surface of the frame 1 and is concentrated in the direction of the light collecting hole 6, and the light F is emitted from the light collecting hole 6 and is extremely strong. It will be able to collect light. Therefore, the light F is externally applied to the frame 1 having a large surface area.
When the light is emitted, the light will be collected in the light collecting hole 6. Since the head of the optical sensor 5 is housed in the inner circumference of the light collecting hole 6, it becomes easy for the semiconductor portion of the optical sensor 5 to convert the emitted light into an electric signal.

FIG. 5 shows a detailed structure of the vibration sensor 13 used in the antitheft machine A. The vibration sensor 13 is a movable body 16 that moves according to vibration.
And a detection body 17 for detecting the movement of the movable body 16. The movable body 16 has one end of a rod-shaped body 18 rotatably attached to a shaft 20 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 a coil spring. It is configured to return to a fixed position at 22. Further, in the detection body 17, a stopper 23 formed of a conductive member in a U shape is fixed on an insulating plate 24 on a base 19, and the conductive member 21 is loosely fitted in the U shape of the stopper 23. At the same time, the standing pieces 25, 25 of the stopper 23 are brought to the turning radius position of the conductive member 21 so that the stopper and the detection electrode act. Then, the vibration sensor 13 has a rod-shaped body 18.
When the conductive member 21 comes into contact with the standing pieces 25, 25 of the stopper 23, the vibration can be electrically detected.

FIG. 6 is a block diagram showing a circuit example of the anti-theft device A, which is composed of an anti-pull switch 4, an optical sensor 5, a vibration sensor 13, and an alarm circuit 30. . The optical sensor 5 has a structure capable of detecting light and darkness of light and converting it into an electric signal, and examples thereof include a photodiode, a phototransistor, and a solar cell. The vibration sensor 13 has a structure capable of detecting vibration and converting it into an electric signal, and uses, for example, a structure shown in FIG. Further, the vibration sensor 13 may have any configuration as long as it can detect any electric signal in response to vibration, such as a mercury switch, a reed switch, or another switch. Removal prevention switch 4
Makes it possible to electrically detect that the product 3 is pulled out from the clear case 2.

The alarm circuit 30 is constructed as follows. That is, the optical sensor 5 is connected to the photoamplifier 31 and supplies a photodetection signal to the photoamplifier 31. The photoamplifier 31 is connected to the Schmitt trigger circuit 33 via the capacitor 32, and supplies the photodetection signal amplified by the photoamplifier 31 to the Schmitt trigger circuit 33 through the capacitor 32. The Schmitt trigger circuit 33 converts the input detection signal into a steep pulse signal. The output of the Schmitt trigger circuit 33 is connected to the first frequency classifier 34, the second frequency classifier 35, and the brightness detector 36. If the frequency of the input signal is less than 2000 [Hz], the first frequency classifier 34 outputs "H" of two values of high ("H") and low ("L"),
Alternatively, when the frequency of the input signal becomes 2000 [Hz] or more, "L" is output. The second frequency classifier 35 outputs "H" if the frequency of the input signal is less than 500 [Hz],
Alternatively, if the frequency of the input signal exceeds 500 [Hz], "L" is output. The output of the first frequency classifier 34 is connected to one input terminal of a NAND circuit 37. The output of the second frequency classifier 35 is inverted (NO
T) The circuit 38 is connected to the other input terminal of the NAND circuit 37. The output of the NOT circuit 38 is connected to the reset input terminal R of the flip-flop 39. The output of the NAND circuit 37 is the flip-flop 39.
Connected to the set input terminal S of. The flip-flop 39 has a set input terminal S connected to the brightness detector 36.
And the contact signal of the withdrawal prevention switch 4 are input. The light / dark detector 36 is a circuit that outputs "L" unless a light detection signal is input for, for example, 3 [S] or more. The flip-flop 39 outputs “H” from the output terminal when “L” is input to the set input terminal S, and outputs “L” from the output terminal when “L” is input to the reset input terminal R. Output. This flip-flop 39
The output terminal of the buzzer drive circuit 40, the vibration detection circuit 41
It is connected to the. The buzzer drive circuit 40 uses the buzzer 15
To drive. When the detection signal from the vibration sensor 13 is input, the vibration detection circuit 41 continues the electric power from the power supply line Vcc for, for example, about 10 [mS] and the photo amplifier 31
And the Schmitt trigger circuit 33. Further, when the vibration detection circuit 41 receives “H” from the output of the flip-flop 39, the vibration detection circuit 41 continues to supply the power from the power supply line Vcc to the photoamplifier 31 and the Schmitt trigger circuit 33. The NAND circuit 37, the NOT circuit 38, and the flip-flop 39 constitute an alarm signal forming circuit 42.

FIG. 7 shows a specific example of the configuration of the alarm circuit 30. The photoamplifier 31 includes a differential amplifier U ₁ , resistors R _{1 and} R ₂ , diodes D _{1 and} D ₂ , and a capacitor C _1. consists -C _2, the light detection signal is amplified by the differential amplifier U ₁ output from the optical sensor 5 are connected as shown in FIG. The output of the differential amplifier U ₁ of the photo amplifier 31 is
It is supplied to the Schmitt trigger circuit 33 via the capacitor 32. The Schmitt trigger circuit 33 includes a differential amplifier U
_2, the capacitor C ₃ -C _4, resistor R ₃ to R _7, NOT
It is composed of the circuit U ₃ , and the inputted light detection signal is used as a pulse signal. The first frequency classifier 34 includes NOT circuits U _{4 to} U _4.
5, the capacitor C ₅ -C _6, a resistor R ₈ to R _9, constitutes an integrating circuit in the capacitor C _6, resistor R _9,
This integrating circuit outputs "H" when a signal having a frequency of less than 2000 [Hz] is input, and outputs "L" when a signal having a frequency of 2000 [Hz] or more is input. Second frequency discriminator 35, NOT circuit U ₇ ~U _8, capacitor C ₇ -C _8, a resistor R ₁₀ to R _11, constitutes an integrating circuit in the capacitor C _8, the resistor R _11, this integrator circuit , "H" is output when a signal with a frequency less than 500 [Hz] is input, and "L" is output when the frequency is 500 [Hz] or more. The light / dark detector 36 includes NOT circuits U _{9 to} U ₁₁ , a resistor R ₁₂ , and a capacitor C ₉ , and the output from the photoamplifier 31 is input to the NOT circuit U ₁₀ and the output from the Schmitt trigger circuit 33 is the NOT circuit. The power output from the vibration detection circuit 41 is input to the input terminal of U _{9 to} the integration circuit composed of the resistor R ₁₂ and the capacitor C ₉ , and the photo amplifier 31 or the Schmitt trigger circuit 33 detects light when power is supplied due to vibration. "H" is output from the output of the nOT circuit U ₁₁ resets the integration circuit and the signal is input, the light detection signal, for example, 3 (S) is not detected and outputs a "L" There is. Flip-flop 39, NAND circuit U ₁₂ ~U _13, resistors R ₁₃ to R
₁₄ and capacitors C _{10 to} C ₁₂ , which are connected as shown in the figure to form a flip-flop, and one input terminal of the NAND circuit U ₁₂ is used as a reset input terminal R.
The other input terminal of ₁₃ is set input terminal S, and NA
The output of the ND circuit U ₁₃ is used as an output terminal. The buzzer drive circuit 40 includes a NAND circuit U ₁₄ , a NOT circuit U ₁₅ , and a resistor R _15.
~ R ₁₆ , a capacitor C ₁₃ , a transistor Q ₁ ,
NAND circuit U ₁₄ , NOT circuit U ₁₅ , resistors R _{13 to} R ₁₄ ,
And a holding circuit for maintaining the ON state by the capacitor C ₁₀ -C _13, emitter transistor Q and the on-state force
Are typing in the base of. One end of the buzzer 15 is connected to the collector of the transistor Q. The other end of the buzzer 15 is connected to the positive electrode of the battery 10. A diode D ₃ is connected to both ends of the buzzer 15 with the polarity as shown. The power supply line Vcc is connected to the battery 10 via the resistor R _17.
Is connected to the positive electrode of. Between the power supply line Vcc and the ground, capacitors C _{14 to} C ₁₅ connected in parallel are connected. The vibration detection circuit 41 includes NOT circuits U _{16 to} U _16.
18 , resistor R _{18 to} R ₁₉ , capacitor C ₁₆ , diode D ₄
When the vibration sensor 13 is connected as shown in the figure to detect vibration, electric power is continuously supplied to the photoamplifier 31 and the capacitor 32 for about 10 [mS].

FIG. 8 is a perspective view showing an exciter used in the antitheft system of the present invention. First, the excitation device 48
Is composed of a drive device 49 and an irradiation panel 50. The irradiation panel 50 includes an on panel 51, an off panel 52,
The on-panel 51 and the off-panel 52 are connected by the connecting part 53 so that the angle can be adjusted, and the on-panel 51 and the off-panel 52 are formed.
And can be removed at the connecting portion 53 in the vertical direction. The on-panel 51 has a large number of infrared light emitting diodes (LEDs) arranged in a matrix.

FIG. 9 is a block diagram showing the entire structure of an exciter used in the anti-theft system. The drive device 49 includes a pulse oscillation circuit 55 and a buffer circuit 56.
A switching circuit 57, a buffer circuit 58, a switching circuit 59, an ON signal power supply circuit 62, and an OFF signal power supply circuit 63. Here, the pulse oscillation circuit 5
5 can output an off pulse signal having a frequency of 2 [kHz] and an on pulse signal having a frequency of 500 [Hz], for example. The pulse signal for turning off the pulse oscillation circuit 55 is supplied to the switching circuit 57 via the buffer circuit 56. Further, the ON pulse signal of the pulse oscillation circuit 55 is supplied to the switching circuit 59 via the buffer circuit 58. An off-panel 52 having LED units 60 in which LEDs are arranged in a matrix is connected to the switching circuit 57. The switching circuit 59 has LEDs arranged in a matrix.
The on-panel 51 having the ED unit 61 is connected. An on-signal power supply circuit 62 is connected to the on-panel 51, and an off-signal power supply circuit 63 is connected to the off-panel 52.

FIG. 10 is a circuit diagram showing a specific circuit configuration of the exciter used in the antitheft system. The pulse oscillation circuit 55 includes NOT circuits U _{30 to} U ₃₁ , resistors R ₃₀ ,
It is composed of capacitors C ₃₀ , C ₃₁ , a crystal oscillator XL, a frequency dividing circuit U ₃₂ , and four input terminal NAND circuits U _{33 to} U ₃₄ .
Connecting the resistor R ₃₀ and the crystal oscillator between the input and output terminal of the NOT circuit U ₃₀ XL, the input terminal of the NOT circuit U ₃₀ is grounded by the capacitor C _30, and the output terminal of the NOT circuit U ₃₀ with the capacitor C ₃₁ generates a basic clock by grounding, NAND of the fourth input terminal as shown the output of the clock signal from the nOT circuit U ₃₁ entered into the frequency divider circuit U ₃₂ via, and frequency divider circuit U ₃₂ by providing the circuit U ₃₃ ~U _34, and outputs a pulse signal for on and for off from the output terminal of the NAND circuit U ₃₃ ~U _34. The buffer circuit 56 is configured by NOT circuits U _{35 to} U ₃₇ connected in parallel. The buffer circuit 58 is NO
The T circuits U _{38 to} U ₄₀ are connected in parallel. The switching circuit 57 includes resistors R ₃₁ , R ₃₂ and a transistor Q.
₂ and the signal from the buffer circuit 56 is connected to the resistor R ₃₁ ,
The voltage is divided by R ₃₂ and supplied to the gate of the transistor Q ₂ . The switching circuit 59 includes resistors R ₃₃ and R ₃₄ and a transistor Q ₃ , and divides the signal from the buffer circuit 58 by the resistors R ₃₃ and R ₃₄ and supplies the divided signal to the gate of the transistor Q ₃ . LED unit 60 of the off-panel 52
One of the electrodes is connected to the drain of the transistor Q ₂ . This LED unit 60 is, for example, 8 L
These LEDs are connected in series with the EDs having the same polarity.
A series body formed by connecting a resistor R ₄₀ in series with, for example, a total of 36
It is configured by connecting in parallel. The other electrode of the LED unit 60 is connected to the off signal power supply circuit 63. The off-signal power supply circuit 63 can adjust the output voltage and can supply direct current 12 [V] to 18 [V]. LED unit 61 of the on-panel 51
One of the electrodes is connected to the drain of the transistor Q ₃ of the switching circuit 57. The LED unit 61 is configured by connecting, for example, eight LEDs in series with their polarities in the same direction, and connecting in parallel, for example, a total of 36 series bodies in which a resistor R ₄₁ is connected in series to these LEDs. . The other electrode of the LED unit 61 is connected to the ON signal power supply circuit 62. On-signal power supply circuit 6
2 is designed so that the output voltage can be adjusted.
2 [V] to 18 [V] can be supplied.

FIG. 11 shows an embodiment of the antitheft system of the present invention. The anti-theft system includes the anti-theft device A and the excitation device 48. The anti-theft device A includes an optical sensor 5, a vibration sensor 13, and an alarm circuit 30.
Composed of. The excitation device 48 includes a drive device 49, an on panel 51, and an off panel 52. Anti-theft machine A
When passing through the irradiation areas of the off-panel 52 and the on-panel 51, the alarm circuit 30 of the anti-theft device A detects the vibration by the vibration sensor 13, so the vibration detection circuit 41 supplies power to the circuit, A pulse signal is formed from the detection signal of the sensor 5, and when the frequency of the pulse signal changes in a plurality of specific frequency bands in a predetermined order, a warning drive signal is formed and the buzzer 15 is activated. It was done.

FIG. 12 shows an example in which the embodiment of the antitheft system of the present invention is applied, and a display shelf 71 is placed inside the building 70. In this display shelf 71,
A large number of anti-theft devices A that store the products 3 are arranged.
These products 3 are fluorescent lights 7 provided on the ceiling of the building 70.
Illuminated by 2. The fluorescent lamp 72 is driven to be lit by AC power of commercial frequency. In addition, the doorway 7 of the building 70
On both sides of the passage of 3, the off-panel 52 which is close to the building 70 and forms a part of the exciter 49, and the on-panel 51 which is apart from the building 70 and forms a part of the exciter 49 are respectively arranged. There is. And from the on-panel 51, 5
Infrared light flashing at a frequency of 00 [Hz] is emitted.
The off-panel 52 radiates infrared light that blinks at a frequency of 2000 [Hz]. In FIG. 12, each panel 5
The drive device 49 for driving to light up the lamps 1, 52 is omitted.

FIG. 13 shows the area illuminated by the on-panel 51 and off-panel 52 shown in FIG.
Are illuminated by the general fluorescent lamp 72, the area 80 is exposed to the infrared light emitted from the off panel 52, and the area 81 is exposed to the infrared light emitted from the on panel 51.

The operation of the embodiment having the above configuration will be described.

FIG. 14 is a time chart shown for explaining the operation of the anti-theft device A when the product 3 is put in a bag or the like. While referring to this time chart and the above figures,
The operation of the anti-theft device A when the product 3 is put in a bag or the like will be described.

First, assuming that the product 3 is installed in the display shelf 71 and the anti-theft device A is placed in a stationary state as shown in FIG. 12, the vibration sensor 13 is turned off. The NOT circuit U ₁₆ of the circuit 41 outputs “H”. As a result, since the vibration detection circuit 41 outputs "L" and does not supply power, the photoamplifier 31 and the Schmitt trigger circuit 33 are not supplied with power from the button battery 10, and therefore the circuit of the anti-theft device A does not operate. Do not work.

However, when the product 3 is removed from the clear case 2 of the anti-theft device A, the removal prevention switch 4 is turned on,
The flip-flop 39 is inverted and the flip-flop 39
Since "H" is output from the output terminal of the resistor R ₁₅ to R ₁₆ in the buzzer driving circuit 40 thereafter, the capacitor C _13, NA
The holding circuit including the ND circuit U ₁₄ and the NOT circuit U ₁₅ holds the ON state of the transistor Q ₁ . Therefore, the buzzer 15 keeps sounding even when the product 3 is returned to the clear case 2.

Next, it is assumed that the product 3 has been stolen in the clear case 2 of the anti-theft device A. That is, inside the building 70, the general fluorescent lamp 7 shown in FIG.
In the illumination area 79 defined by 2, it is assumed that the product 3 is put in a pocket of clothes, for example. Vibration is usually involved in achieving such a state. This vibration is detected by the vibration sensor 13 (see FIG. 14T ₁ ), electric charge is accumulated in the capacitor C ₁₆ of the vibration detection circuit 41, and the NOT circuit U ₁₆ outputs “L”, which causes the output of the vibration detection circuit 41. As a result, "H" is output and power is supplied. After that, the vibration detection circuit 41 continuously outputs “H” until the capacitor C ₁₃ has no electric charge for a certain time (for example, 10 seconds here) from the time when the vibration sensor 13 is turned off (see FIG. 14 T ₂ ).

In such a power supply state, when the light is detected by the optical sensor 5, the brightness detector 3
6, the power supply output from the vibration detection circuit 41 is continuously input as "H" to the integrating circuit including the resistor R ₁₂ and the capacitor C _9, but the photo amplifier 31 or the Schmitt trigger circuit 33 outputs the NOT circuit U ₉ Alternatively, when a photodetection signal is input to U ₁₀ , the integrating circuit is reset and “H” is output from the output of the NOT circuit U ₁₁ . Further, in this case, since “H” is output from the first frequency separator 34 and the second frequency separator 35, “L” is output from the NOT circuit 38 and “H” is output from the NAND circuit 37. Is output. Therefore, the flip-flop 3
“H” is input to the set input terminal S of 9 and “L” is input to its reset input terminal R. Therefore, since the flip-flop 39 is not inverted, the buzzer 15 does not ring when this light is detected. Therefore,
It is possible to prevent erroneous ringing while the person who purchases the product 3 is in possession.

However, as described above, the vibration detection circuit 4
When vibration is detected by 1 and power is supplied, if the light is intercepted and the light is blocked as described above, this is detected by the optical sensor 5 (see t _{1 in} FIG. 14). In this case, the photodetector 31 and the Schmitt trigger circuit 33 lose the light detection signal and output "L". When this "L" is input to the brightness detector 36, NO
The output of the T circuit U _9, U ₁₀ is turned off, when the off state continues for a predetermined time (in FIG. 14 3 seconds), the NOT circuit U ₁₁ from the capacitor C ₉ of brightness detector 36 is charged "L" will be output. "L" from the brightness detector 36 is input to the set input terminal S of the flip-flop 39, and the flip-flop 39 is inverted. As a result, “H” is output from the output terminal of the flip-flop 39, and this is supplied to the buzzer drive circuit 40 and the vibration detection circuit 41. As a result, the buzzer drive circuit 40 sounds the buzzer 15, and the vibration detection circuit 41 continues to supply power to the photo amplifier 31 and the Schmitt trigger circuit 33 (see t _{2 in} FIG. 14). After that, the buzzer 15 continues to ring regardless of the state of the photoamplifier 31 and the like (see t _{2 and} after in FIG. 14).

Next, referring to the time chart shown in FIG. 15 and each of the above figures, the product 3 is stored in the clear case 2 of the anti-theft device A and the anti-theft device A is exposed to light. The operation when passing through the doorway 73 in the state will be described.

Furthermore, it is assumed that the product 3 is taken out in the clear case 2 of the anti-theft device A in a stored state. At this time, the product 3 is in a state of being exposed to the light in the illumination area 79 in the building 70 (time t _{1 to} t _{2 in} FIG. 15), and is usually accompanied by vibration. When this vibration is detected by the vibration sensor 13 (see T _{1 in} FIG. 15), electric charge is stored in the capacitor C ₁₆ of the vibration detection circuit 41, and the NOT circuit U ₁₆ is set to "L".
Therefore, “H” is output as the output of the vibration detection circuit 41 to supply electric power. After that, the vibration detection circuit 41 continuously outputs “H” until the capacitor C ₁₃ has no electric charge for a certain time (for example, 10 seconds here) from the time when the vibration sensor 13 is turned off (see FIG. 15 T ₂ ).

When the optical sensor 5 is exposed to the light in the illuminated area 79 (see FIG. 13) in the state where the power is supplied in this way (see FIG. 13), the light / dark detector 36 uses the power from the vibration detecting circuit 41. "H" is continuously input to the integrator circuit whose output consists of resistor R ₁₂ and capacitor C ₉ ,
A photodetection signal is input to the NOT circuit U ₉ or U ₁₀ from the photoamplifier 31 or the Schmitt trigger circuit 33, and the integrating circuit is reset, so that the NOT circuit U
“H” is output from the output of ₁₁ . In this case, since from the first frequency discriminator 34 and a second frequency discriminator 35 "H" it is output (time t ₁ ~t ₂ in FIG. 15),
From the NOT circuit 38 "L" is output from the NAND circuit 37 is output "H" (time t ₁ in FIG. 15 ~t
₂ ). Therefore, the set input terminal S of the flip-flop 39 is "H" and the reset input terminal R thereof is "L".
Is entered. As a result, the flip-flop 39 is not inverted, so that the buzzer 15 does not ring when this light is detected. Therefore, it is possible to prevent erroneous ringing when the person who purchases the product 3 is in possession.

When the doorway 73 exits the illumination area 79, it first passes through the area 80 illuminated by the off-pulse infrared light by the LED unit 61 of the off panel 52 (from time t _{2 in} FIG. 15). t ₃ ), and this is detected by the optical sensor 5. The off-pulse light detection signal from the optical sensor 5 is amplified by the photoamplifier 31, and then the Schmitt trigger circuit 33 outputs a 2000 [Hz] pulse signal as a first frequency sorter 34, a second frequency sorter 35, and a brightness detector. Input to the container 36. Then, the first frequency sorter 34
Outputs "L", and the second frequency classifier 35 also outputs "L".
Is output. The output "L" of the first frequency sorter 34 is NA
It is input to one side of the ND circuit 37. Second frequency sorter 3
The output “L” of 5 is inverted by the NOT circuit 38 to be “H” and then input to the NAND circuit 37 and also to the reset input terminal R of the flip-flop 39. When the reset input terminal R becomes "H", the flip-flop 39 becomes invertible, but N
Since "H" is input from the AND circuit 37 to the set input terminal S of the flip-flop 39, the flip-flop 39 does not invert.

In such a state, as shown in FIG.
From the state where the product 3 is exposed to the off-pulse light (illumination area 8
0), when moving to the area 81 illuminated by the on-pulse infrared light emitted from the LED unit 60 of the on-panel 51 (time t _{3 in} FIG. 15), the optical sensor 5 of the anti-theft device A uses the infrared light. Detect light pulse. Then, 500 [Hz] is output from the Schmitt trigger circuit 33 inside the anti-theft device A.
The pulse signal of is output. This pulse signal is input to the first frequency classifier 34, the second frequency classifier 35, and the brightness detector 36. Then, the first frequency sorter 34
Outputs "H". At the same time, the second frequency sorter 35
Outputs "L". The output “H” of the first frequency classifier 34 is input to one terminal of the NAND circuit 37.
At the same time, the output “L” of the second frequency classifier 35 is inverted by the NOT circuit 38 to become “H”, and this “H” is NAN.
Input to the other terminal of the D circuit 37 and the reset input terminal R of the flip-flop 39. Since both input terminals of the NAND circuit 37 are "H", "L" is output from the output terminal and supplied to the set input terminal S of the flip-flop 39. Thus, flip-flop 39 is inverted, "H" from the output terminal is to be outputted as an alarm drive signal (to time t ₃ in Figure 15). The output signal “H” as the alarm drive signal is output by the buzzer drive circuit 4
0 and the vibration detection circuit 41. As a result, the buzzer drive circuit 40 sounds the buzzer 15,
Moreover, the vibration detection circuit 41 continues to supply power to the photoamplifier 31, the Schmitt trigger circuit 33, and the like (from t _{3 in} FIG. 15). After that, the buzzer 15 continues to ring regardless of the state of the photo amplifier 31 and the like (after t _{2 in} FIG. 15). This makes it possible to prevent theft.

FIG. 16 is an explanatory view of another example of installation of the irradiation panel 50. In this case, the on panel 51 and the off panel 52 are separated, and the off panel 52 is provided above the inside of the entrance 73 of the building 70. It is provided to emit off-pulse infrared light from top to bottom, and the on-panel 51 is arranged on both sides of the external passage of the doorway 73. Even with such an arrangement of the irradiation panel 50, the same operation and effect as described in the above embodiment can be obtained.

FIG. 17 shows another configuration example of the irradiation panel 50. This irradiation panel 50 has an on-panel 51 and an off-panel 5 on the side surface of a deformed hexagonal box 54.
2 and 2 are arranged. In this case, the on-panel 51
Although the off panel 52 and the off panel 52 cannot be separately provided, they can be stably installed.

FIG. 18 shows a modified example of the light collecting hole 6 in the frame body 1. The light collecting hole 90 is formed in a quadrangular pyramid-shaped recess. For this reason, the concave portion is formed into four flat surfaces whose inner peripheral surfaces are triangular.
The three triangular surfaces are connected in a prism shape.
Depending on the light collecting hole 90, the light from the outside with which the surface of the frame 1 is irradiated is reflected by the inner and outer surfaces of the frame 1 and is collected in the light collecting hole 90 to emit light. Therefore, the amplified light is concentrated on the optical sensor 5 housed in the inner space of the light collection hole 90 and can react with the light with high sensitivity.

Further, FIG. 19 shows a modified example of the light collecting hole 6 in the frame body 1. The light collecting hole 91 is radially formed by six wedge-shaped cuts formed in the inner surface of the frame body 1. Has been formed. Therefore, the light collecting hole 91 is formed with two surfaces for each cut, and has a total of 12 light emitting surfaces. When the surface of the frame body 1 is irradiated with light from the outside, the light is reflected on the inner and outer surfaces of the frame body 1 and emitted on each of the cut surfaces of the light collecting hole 91. Since the light-collecting hole 91 has a large number of light-emitting surfaces, any surface emits light no matter what angle the light enters, and the ability of the optical sensor 5 to detect light is improved.

FIG. 20 shows a modification of the light collecting hole 6 in the frame body 1. The light collecting hole 92 has a groove shape cut in a V shape along the top and bottom of the frame body 1. Is formed. In this light collecting hole 92, elongated grooves are formed over the upper and lower lengths of the frame body 1. Therefore, the light irradiating the peripheral surface of the frame body 1 is always captured in this light collecting hole 92, and the light is surely emitted. Can react to.

Next, FIG. 21 shows another embodiment of the anti-theft device B according to the present invention. This anti-theft machine B
Is used by being attached to products such as clothes and electric appliances. A box-shaped main body 102 is connected with a hanging string 104 for hanging on the product. A detection plate 103 having a flat surface and a large area for capturing light is closely attached to one side surface of the main body 102.
A box-shaped outer shell of the anti-theft device B is formed by 2 and the detection plate 103. Like the frame 1, the detection plate 103 is formed of a polymer resin material having a high light-transmitting property and a high refractive index, for example, an organic compound such as acrylic styrene or polycarbonate. An optical sensor 105 is provided at the center of the back surface of the detection plate 103. This body 1
A buzzer hole 106, which has a slit shape and emits an alarm sound, is opened on one side surface of 02.

FIG. 22 shows a state in which the detection plate 103 is removed from the main body 102 in order to show the inside of the anti-theft machine B. The main body 102 is hollow inside and has a box shape with one side surface opened, and an optical sensor 105 is fixed to the center of the opened surface. In addition, the back side of the removed detection plate 103 (the surface that comes into close contact with the main body 102)
A light collecting hole 107 is formed at the center of the. With this configuration, when the detection plate 103 is closely attached to the side surface of the main body 102 to be assembled, the head of the optical sensor 105 is inserted into the light collection hole 107.

With this structure, in the anti-theft device B, the detection plate 103 having a large area absorbs the light emitted from the outside and reflects the light inside. The absorbed light is emitted inside the light collecting hole 107, and the light from the outside is detected by the optical sensor 105 in the light collecting hole 107. In this embodiment, light is collected by the detection plate 103 having a flat and large area, so that the light collection efficiency is improved even if the light has weak illuminance.

Next, FIG. 23 shows an anti-theft device C which is still another embodiment of the present invention. In this configuration, the anti-theft device C is applied to a jewel case, the product jewel 117 can be seen from the outside, and the burglar alarm can be generated by detecting the theft by itself. . The anti-theft device C includes a box-shaped base 112 and a lid 113, and an electronic circuit, a sensor, and the like are housed inside the three-dimensional base 112.
3 is formed of a polymer resin material having a high light-transmitting property and a high refractive index, for example, an organic compound such as acrylic styrene or polycarbonate, and has a shape in which the lower side is opened. By covering the upper surface of the base 112 with the lid 113, the antitheft device C is configured. An optical sensor 115 is attached to the upper edge of the base 112, and the head of the optical sensor 115 is projected from the upper surface of the base 112. Light hole 11
The head of the optical sensor 115 is not exposed to the outside. Further, a buzzer hole 114 for emitting a warning sound from a buzzer inside is opened on a side surface of the base 112.

FIG. 24 shows a state in which the lid 113 is removed from the base 112. The head of the optical sensor 115 is projected at two opposite positions on the edge of the upper surface of the base 112, and a semi-circular perforated collection is made at the two opposite lower edges of the lid 113. A light hole 116 is formed.
With this configuration, the light emitted to the lid 113 is absorbed inside the lid 113, reflected on the inner surface, amplified by the light collection hole 116 to emit light, and inserted into the inner space of the light collection hole 116. The light sensor 115, which is installed, illuminates the light. In this embodiment, the upper half of the anti-theft device C is formed on the lid 113, and the lid 113 as a whole absorbs light, so that the light is reliably captured. Further, since the lid 113 is made of a transparent material, it is possible to store a small product such as a jewel, which is expensive, and to observe the product from the outside. Therefore, it is possible to share the crime prevention with the product case.

[0053]

As described above, in the anti-theft device of the present invention, when the vibration is detected by the vibration sensor, when the light sensor changes the light from bright to dark and a predetermined time elapses, the alarm is issued. Or when the vibration sensor senses vibration, when the light sensor detects light of two specific frequencies in a predetermined order, an alarm can be issued as theft. When detecting the theft with this optical sensor, the change of light can be detected while the head of the optical sensor is not exposed to the outside but is housed inside, and the manufacturing is easy without any discomfort. Furthermore, the outer periphery of the anti-theft device is made of a material that easily absorbs light,
Since the optical sensor is inserted in the concave portion formed in a part of the outer shell, the light absorbed from the outside can be amplified and applied to the optical sensor, and the sensitivity to light is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an anti-theft device of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a lower portion of the embodiment of the anti-theft device.

FIG. 3 is a cross-sectional view showing a cross-sectional shape of a frame body of the anti-theft device.

FIG. 4 is an explanatory diagram showing a light path through a light collecting hole and an optical sensor.

FIG. 5 is a perspective view showing an example of a vibration sensor used in the embodiment of the antitheft device.

FIG. 6 is a block diagram showing a circuit example of an embodiment of the anti-theft device.

FIG. 7 is a circuit diagram showing a specific circuit configuration example of the circuit example of FIG.

FIG. 8 is a perspective view showing a configuration example of an exciter used in the antitheft system.

FIG. 9 is a block diagram showing a circuit example of an exciter used in the theft prevention system.

10 is a circuit diagram showing a specific circuit configuration example of the circuit example of FIG.

FIG. 11 is an explanatory view showing an embodiment of the anti-theft system of the present invention.

FIG. 12 is a perspective view showing an application example of the embodiment of the anti-theft system of the present invention.

FIG. 13 is an explanatory diagram of an illumination area of the embodiment of the antitheft system.

FIG. 14 is a flowchart for explaining the operation of the anti-theft system when a product is put in a bag or the like.

FIG. 15 is a flow chart for explaining the operation of the anti-theft system when a product is brought out of the doorway.

FIG. 16 is a diagram for explaining another case of irradiation with an irradiation panel.

FIG. 17 is a perspective view showing another configuration example of the irradiation panel.

FIG. 18 is an enlarged perspective view showing a second embodiment of the light collecting hole in the present invention.

FIG. 19 is an enlarged perspective view showing a third embodiment of the light collecting hole in the present invention.

FIG. 20 is an enlarged perspective view showing a fourth embodiment of the light collecting hole in the present invention.

FIG. 21 is a perspective view showing a second embodiment of the anti-theft device of the present invention.

FIG. 22 is a perspective view showing a state where the surface of the anti-theft machine according to the second embodiment is removed.

FIG. 23 is a perspective view showing a third embodiment of the anti-theft device of the present invention.

FIG. 24 is a perspective view showing a state where the lid of the anti-theft machine according to the third embodiment is removed.

[Explanation of symbols]

 A Anti-theft device B Anti-theft device C Anti-theft device 1 Frame 2 Clear case 3 Product 4 Extraction prevention switch 5 Optical sensor 6 Focusing hole 7 Bottom plate 10 Battery 13 Vibration sensor 15 Buzzer 30 Alarm circuit 31 Photo amplifier 32 Condenser 33 Schmidt Trigger circuit 34 First frequency sorter 35 Second frequency sorter 36 Brightness / darkness detector 37 NAND circuit 38 NOT circuit 39 Flip-flop 40 Buzzer drive circuit 41 Vibration detection circuit 42 Alarm signal forming circuit 48 Excitation device 49 Drive device 50 Irradiation panel 51 On-panel 52 Off-panel 55 Pulse oscillation circuit 56 Buffer circuit 57 Switching circuit 58 Buffer circuit 59 Switching circuit 60 LED unit 61 LED unit 62 LED signal 62 ON signal power supply circuit 63 OFF signal power supply circuit

Claims (7)

[Claims] 1. An anti-theft machine having an optical sensor for detecting light and darkness of light and converting it into an electric signal and detecting theft by light and darkness of light. At least a part of an outer circumference of the anti-theft machine is transparent. Of anti-theft machine, which is made of high-polymer resin material with good properties and high refractive index, and a recess is made inside the part made of this high-polymer resin material, and an optical sensor is inserted in this recess. Construction. 2. A light-collecting structure for an anti-theft device according to claim 1, wherein acrylic styrene is used as a polymer resin material forming a part of an outer circumference of the anti-theft device. 3. The light-collecting structure for an anti-theft device according to claim 1, wherein polycarbonate is used as a polymer resin material forming a part of an outer circumference of the anti-theft device. 4. The light-collecting structure for an anti-theft device according to claim 1, wherein the recess formed in the outer periphery of the anti-theft device has a semicircular cross-section structure. 5. The light-collecting structure for an anti-theft device according to claim 1, wherein the recess formed in the outer periphery of the anti-theft device is formed to have a multi-sided cross-sectional structure in which a plurality of flat surfaces are combined. 6. A burglarproof device comprising at least one side surface of a box-shaped enclosure made of a polymer resin material having a high light-transmitting property and a high refractive index to accommodate a detection circuit and the like, thereby forming an anti-theft device. A light-collecting structure for an anti-theft device, characterized in that a concave portion for condensing absorbed light is formed in a part of the inside, and an optical sensor is inserted in this concave portion. 7. A burglarproof device comprising a box-shaped base part in which a detection circuit and the like are housed and a lid body which can be detachably attached to the base part, thereby forming an anti-theft device. Theft that is made of a polymer resin material with a high refractive index, has a recess in the periphery of the lid, and an optical sensor that is inserted into the recess when the lid is fitted to the base The light concentrating structure of the preventer.