JPH07272130A - Theft preventing device - Google Patents

Abstract

PURPOSE:To inform of the theft of commodity by burying a phototransistor of a tag in a storage box storing the commodity and permitting a control means to give an alarm when the output signal of the phototransistor becomes a different state. CONSTITUTION:The tag 20 is provided with the phototransistor 21 formed on a circuit substrate 15, and it is provided with a casing 16 having a flat surface on the base part of a cylinder part 16a holding the transistor, a dome- liked casing 17 having an opening 17a guiding a conductor 14 into the tag 20 and a both-side adhesive tape 22 fixing the tag 20 on a corrugated cardboard. At a store, the projecting part 21a of the phototransistor 21 is pierced into the corrugated cardboard 10 storing the commodity, and it is pierced until the both-side adhesive tape 22 is abutted on the corrugated cardboard 10. When the tag 20 is pulled out, the phototransistor 21 senses illumination light in the store and the control means rings an alarm buzzer. Even if the corrugated cardboard is destroyed and the commodity is taken out, the alarm is issued.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antitheft device for detecting different states of a tag and controlling an alarm means in accordance with the change in the state. In particular, the product is stored in a paper storage box such as a cardboard box, It is preferably used for those placed inside a store.

[0002]

2. Description of the Related Art FIGS. 10 and 11 are explanatory views showing respective states of a conventional antitheft device.

The conventional monitoring device C is a push switch 1
And a warning means 2 such as a buzzer, and a control means 3 for sounding the warning means 2 when the push switch 1 is turned off. As shown in FIG. 10, the push switch 1 is electrified so as to be turned on. The product B or the like is directly fixed to the product B with the adhesive tape 5, and when the product B and the monitoring device C are peeled off, the push switch 1 is turned off and the control means 3 sounds an alarm sound as shown in FIG. Was becoming.

[0004]

However, when the product B is stored in a paper storage box such as a cardboard box and placed in a store, the cardboard box where the push switch 1 is attached is cut off and the tag is removed. If it is done, there is a problem that the theft cannot be notified.

The object of the present invention is to provide a storage box such as a corrugated cardboard box in which products are stored and arranged in a storage box.
An object of the present invention is to provide a highly reliable antitheft device that can notify theft of the product.

[0006]

In order to achieve the above object, the invention according to claim 1 is a tag attached to an article, which can be in different states at least corresponding to attachment and detachment, and an alarm means. In an anti-theft system that is connected to the tag and includes a control unit that detects different states of the tag and controls the alarm unit according to the state change, the article is a storage box for storing a product, and the tag Has light receiving means, and the light receiving means is embedded in the storage box, and the control means detects the output signal of the light receiving means and drives the alarm means when the output signals are in different states. . Preferably, the light receiving means is provided with a convex portion for inserting the storage box. More preferably, the tag is provided with an attachment means that enables attachment to the storage box. In another preferred form, the light receiving means includes a light receiving sensing element mounted in the tag body and a light guiding means capable of guiding light to the light receiving sensing element, and the light guiding means has a convex portion for inserting a storage box. Was set up.

Further, the invention according to claim 5 is a tag which is installed in an article and can be in a different state depending on a situation different from the installation state, an alarm means, and a different state of the tag connected to the tag. In the anti-theft system, which includes a control unit that detects an error and controls the alarm unit according to the state change, the article is a storage box that stores a product, and the tag is provided with two electrode units, A loop-shaped conductive part formed on the peripheral surface of the storage box is extended from the one electrode part and the conductive part is arranged to be crimped to the other electrode part, and the resistance of the conductive part is controlled by the control means. Find the value,
The alarm means was actuated when different conditions were encountered. Preferably, the loop-shaped conductive portion is provided so as to straddle the lid portion of the storage box and the fixed portion of the cardboard box.

Further, in the invention according to claim 7, a tag which is attached to an article and can be in different states corresponding to at least the attachment and the detachment, an alarm means, and a different state of the tag connected to the tag and different states. In a theft prevention system including a control means for detecting and controlling the alarm means according to the change in the state, the tag includes a wide adhesive layer, a conductive layer formed on the adhesive layer, and the conductive layer. Having a base material formed on the adhesive surface of the tag is attached to the article,
The alarm means is driven when the resistance value of the conductive layer is detected by the control means and the states become different.

[0009]

According to the first aspect of the invention, the light receiving means is embedded in the storage box, and in that state, the light receiving means does not detect light and thus does not issue an alarm. When the tag is removed from the storage box in which the product is stored, the light receiving element senses external light and issues an alarm. Further, even when the lid of the storage box is opened to steal only the stored products, the light receiving means detects the external light and issues an alarm. Further, even if the storage box of the part to which the tag is attached is cut out and the tag is to be removed, the light receiving element senses external light and issues an alarm. Therefore, since it is possible to notify and prevent any theft behavior when the product is stored in the storage box, it is possible to provide a highly reliable antitheft device.
When the light receiving means is provided with a convex part for inserting the storage box,
The light receiving means can be easily stored in the storage box by using the convex portion. Further, when the tag is provided with an attaching means capable of being attached to the storage box, the tag can be held in the storage box, so that the tag can be prevented from coming off the storage box due to its own weight or the like. . Further, in the case where the light receiving means is provided with a light receiving sensing element mounted in the tag body and a light guiding means capable of guiding light to the light receiving sensing element, and the light guiding means is provided with a convex portion for inserting the storage box. The light guide means can be easily housed in the storage box by using the convex portion of the light guide means, and the light can be guided from the light guide means to the light receiving sensing element.

According to the fifth aspect of the present invention, since the loop-shaped conductive material provided between the two electrodes is formed on the peripheral surface of the storage box, the storage box is deformed and broken, and the product is stolen. Even if an attempt is made, at the same time, the loop formed by the conductive material is also deformed and destroyed, and the resistance value between the electrodes is changed, and finally, the loop is opened and an alarm is issued. Also,
Even a remarkable deformation that does not lead to the destruction of the storage box can be detected by changing the setting of the detection means, so that the theft can be prevented immediately. Further, when the loop-shaped conductive material is provided so as to straddle the fixed portion of the storage box, the conductive material causes a remarkable deformation when the lid of the storage box is opened to take out the product from the storage box. Alternatively, an alarm can be issued to destroy.

Further, the invention according to claim 7 is a tag,
The tag has a wide adhesive layer, a conductive layer formed on the adhesive layer, and a base material formed on the conductive layer, and the adhesive surface of the tag is attached to the article. Since the adhesive layer is formed wide, it is difficult to cleanly remove the adhesive layer from the article, and a part of the adhesive layer remains on the article side, and a part of the conductive layer also remains on the article side. Alternatively, at least a part of the conductive layer will be seriously damaged even if not destroyed.

Therefore, the resistance value of the conductive layer changes due to the loss of a part of the conductive layer or a great damage. Therefore, if the resistance value is monitored by the control means, the tag is pulled from the article. It can be detected that it has been peeled off.

[0013]

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

FIG. 1 is a perspective view showing an outline of an embodiment of an anti-theft device according to the present invention, FIG. 2 is a view showing a tag of an embodiment of an anti-theft device according to the present invention, and FIG. A circuit diagram of a detection circuit of an embodiment of the anti-theft device according to the present invention, FIG. 4 is a view showing another embodiment of the present invention, FIG. 5 is a view showing another embodiment of the present invention, and FIG. 6 is shown in FIG. 7 is a cross-sectional view of the tag, FIG. 7 is a view showing another embodiment of the present invention, FIG. 8 is a cross-sectional view of the tag shown in FIG. 7, and FIG. 9 is a perspective view of the tag shown in FIG.

As shown in FIGS. 1 to 3, a theft prevention device according to an embodiment of the present invention includes a tag 20 having a phototransistor 21 as a light receiving means and the phototransistor 2.
Two conductors 14 electrically connected to both ends of the control unit 1 and a control means 40 built in the main body A and connected to the conductors 14.
And a buser 30 which is an alarm means built in the main body A and connected to the control means 40.

The tag 20 has a phototransistor 21, resistors R20 and 21, a transistor Q4 formed on the circuit board 15, and a tubular portion 16a for holding the phototransistor 21, and has a flat surface at the base thereof. Have first
Housing 16 and opening 1 for introducing the conductor 14 into the tag
It has a dome-shaped second housing 17 having 7a, and an attachment means that is attached to the flat surface of the first housing 16 to fix the tag 20 to the cardboard box B, that is, a double-sided adhesive tape 22. . The second housing 17 is the first housing 1
6, and the circuit board 15 is snap-coupled at the periphery thereof, and the circuit board 15 includes the first housing 16 and the second housing 1.
It is sandwiched between 7 and positioned. The top of the phototransistor 21 has a conical convex portion 21 a, and the convex portion 21 a projects from the tag 20.

Next, the detection circuit of the main body shown in FIG. 3 will be described.

The emitter of the phototransistor 21 of the tag 20 is connected to the base of the transistor Q4 through the resistor R21, and the emitter of the transistor Q4 is the conductor wire 14.
And is connected to the GND of the control means 40 of the main body A. The collector of the phototransistor 21 is connected to the collector of the transistor Q4, and further connected to Vcc through the conductor 14 and the resistor R1. Also, the transistor Q4
A resistor R20 is connected between the collector and the emitter of and the divided voltage is applied to a differentiating circuit 41 composed of a capacitor C1 and resistors R2 and R3. The differentiating circuit 4
1 is for generating the output voltage only when the change of the input voltage is abrupt, and is for preventing an erroneous alarm even for a slight voltage fluctuation. The differentiating circuit 41 is connected to a judging circuit 42 composed of resistors R4, R5, U1 and a judging circuit 43 composed of resistors R6, R7, U2. The judging circuits 42, 43 are connected to the judging circuits 42, 4 respectively.
This is to issue an alarm only when the input voltage to 3 is out of the preset voltage range.
The judging circuit 42 is connected to an integrating circuit 44 composed of a resistor R8 and a capacitor C2, the judging circuit 43 is connected to an integrating circuit 45 composed of a resistor R16 and a capacitor C3, and the integrating circuits 44 and 45 are It is provided to cancel the noise for a certain time or less, and prevents malfunction. The integrating circuits 44 and 45 are diode D
1, a latch circuit 4 connected to D2 and further OR-connected
6 and is connected to a rectangular wave generation circuit 47 composed of an operational amplifier U4, resistors 11, 12, 13, 14 and a capacitor C5 via transistors Q1 and Q2.
Further, the rectangular wave generating circuit 47 is connected to the alarm means, that is, the alarm buzzer 30, via the transistor Q3.

Next, the operation of the detection circuit will be described. The convex portion 21a of the phototransistor 21 is pierced into the cardboard box 10 in which the product B is stored at the store, and the double-sided adhesive tape 22 is inserted until it comes into contact with the cardboard box. When the tag 20 is removed from the cardboard box in that state, the phototransistor 21 senses the light of the illumination in the store and passes a current, and the output voltage of the differentiating circuit 41 drops. And
When the voltage drops below the threshold voltage of the comparator U2, the output of the comparator U2 fixed at the L level becomes open. Then, the voltage of the integrating circuit 45 rises and the latch circuit 46 OR-connected by the diode D2 is set.

Similarly, when the conductor 14 is short-circuited and the tag is to be removed, when the output voltage of the differentiating circuit 41 drops and falls below the threshold voltage of the comparator U2, the output of the comparator U2 opens and the integrating circuit 45 Voltage rises and the diode D2 sets the latch circuit 46.

When the lead wire 14 is disconnected, the output voltage of the differentiating circuit 41 rises, and when it exceeds the threshold voltage of the comparator U1, the output of the comparator U1 fixed at the L level is opened. Then, the voltage of the integrating circuit 44 rises and the latch circuit 46 is set by the diode D1.

When the latch circuit 46 is set, the transistors Q1 and Q2 are turned off, and the rectangular wave generating circuit 4
7 operates, transistor Q3 turns on and alarm buzzer 16
Sounds.

Therefore, in this embodiment, an alarm is issued when the conductor 14 is short-circuited or the conductor 14 is cut, so that the function of the tag 20 cannot be stopped without the alarm. Then, even if the tag 20 is removed from the cardboard box or the cardboard box is destroyed and the product is taken out, an alarm is issued, so that it is possible to provide a very reliable antitheft device.

In the above description, the tag 20 on the upper side in FIG. 3 has been described, but a plurality of tags 20 may be connected to the main body A, in which case each tag 2
Depending on 0, a circuit similar to the circuit within the chain line in FIG. 3 may be provided within the broken line. Although FIG. 3 shows the case of one tag 20, the same applies to two or more tags.

Further, in this embodiment, the convex portion 21a of the phototransistor 21 is directly inserted into the cardboard box, but when it is used in a thick cardboard box, it may be inserted with a small hole beforehand, or the whole. Alternatively, the phototransistor 21 may be covered with a transparent cap having a needle-like tip. Furthermore, the first housing 16
The tip of the cylindrical portion 16a of the
1 may be arranged in the middle of the cylindrical portion 16a.
Further, as shown in FIG. 4, the light guide means 24 having the convex portion 24a may be provided on the cylindrical portion 16a, and the light receiving sensing element, that is, the phototransistor 23 may be arranged on the circuit board 15. In this embodiment, the case where the tag 20 is attached to the cardboard box 10 and used is shown.
It can also be used by sticking it on a paper, wooden or plastic storage box. The point is that if there is a possibility that the storage box will be broken and the tag will be removed, the tag of this embodiment will be attached to the storage box. Is effective if used.

Next, another embodiment of the present invention will be described with reference to FIGS. The part of the main body A is omitted because it is similar to the above-mentioned embodiment.

As shown in FIGS. 5 and 6, the antitheft device according to another embodiment of the present invention includes a tag 50 having two protruding electrode portions 51 and a paper storage box such as a cardboard box. And a loop-shaped conductive portion 52 to be applied. The loop-shaped conductive portion 52 is formed by applying a conductive adhesive material, and has a narrow width portion 52 that is substantially the same as the distance between the two electrode portions 51.
a is provided. In addition, the conductive portion is a cardboard box lid 10.
It is applied so as to straddle a and the fixed side 10b of the cardboard box.

When the electrode part 51 is pierced into a cardboard box, the electrode part 51 is pressure-bonded to the conductive part 52 to be electrically conducted, and the electrode part is connected to the conductor wire 14 via the wiring pattern and guided to the main body A. When the lid 10a is opened to steal goods or the cardboard box is destroyed, the conductive portion 52 is destroyed, the electrode portions 51 are opened, the voltage of the differentiating circuit 41 rises, and an alarm is issued as described above. In addition, even when the cardboard box is significantly deformed so as not to be destroyed, the resistance value changes and an alarm is issued. In the present embodiment, the conductive portion 52 is formed of a conductive adhesive and has a shape having an opening, but it may be formed by applying a conductive paint or a resistance ink, or may have a closed shape. . In addition, in this embodiment, the tag 50 is attached to the cardboard box 10.
Although the case of attaching and using is shown, it can also be used by attaching it to a paper, wooden, or plastic storage box. The point is that if there is a possibility that the storage box is broken and the tag is removed. It is effective to use the tag of this embodiment for the storage box.

Next, another embodiment of the present invention will be described with reference to FIGS. The part of the main body A is omitted because it is similar to the above-mentioned embodiment.

As shown in FIGS. 7 to 9, a tag 60 of an anti-theft device according to another embodiment of the present invention has a loop-shaped conductive layer 62.
And a connector 65 having two terminals 64 electrically connected to both ends of the conductive layer 62.
Used by being pasted on. As shown in FIG. 8, the conductive layer 62 is composed of a resistor, and an adhesive layer 61 is formed on the lower surface side of the conductive layer 62, and a flexible base material 63 is formed on the upper side of the conductive layer 62. The base material 63,
The conductive layer 62 and the adhesive layer 61 are formed with a width of about 20 cm. When attempting to peel off the tag 60 from the cardboard box 10, part of the adhesive layer 61 remains on the cardboard box 10 side, and part of the conductive layer 62 also remains on the cardboard box 10 side. Some will be missing. Even if the tag 60 is not dropped, the conductive layer 62 is greatly damaged by the pulling force when the tag 60 is peeled off. Then, the resistance value between the end portions of the conductive layer 62 increases, the voltage of the differentiating circuit 41 rises, and an alarm is issued as described above.

The conductive layer 62 and the adhesive layer 61 are 20 cm.
Since the width is about the same and the length is long, it is difficult to peel off the adhesive layer 61 cleanly without breaking the conductive layer 62 once it is attached to the cardboard box, and even if it can be peeled off, it is long. It takes time, so it's almost impossible.

In this embodiment, the tag 60 is attached to the cardboard box 10 for use. However, the tag 60 may be attached directly to the product B for use.

[0033]

According to the invention of claim 1, the light receiving means is
Since it is embedded in an article and the light receiving means does not detect light in that state, it does not give an alarm. When the tag is taken from the article, the light receiving element senses external light and gives an alarm. Therefore, it is possible to notify and prevent theft, and it is possible to provide a highly reliable antitheft device.

Further, according to the fifth aspect of the invention, since the loop-shaped conductive material provided between the two electrodes is formed on the peripheral surface of the storage box, the cardboard box is deformed and the cardboard box is deformed. Even if the box is broken and the article is stolen, the loop formed by the conductive material is also deformed and destroyed at the same time, and the resistance value between the electrodes is changed to finally open, and an alarm is issued. In other words, even a remarkable deformation of the cardboard box that does not result in destruction can be detected by changing the setting of the detection means, so that the theft can be prevented immediately. Further, when the loop-shaped conductive material is provided so as to straddle the fixed portion of the cardboard box, the conductive material is destroyed when the lid of the cardboard box is opened to take out an article from the cardboard box. An alarm can be issued.

Further, in the invention according to claim 7, the tag is
It has a wide adhesive layer, a conductive layer formed on the adhesive layer, and a base material formed on the conductive layer, and the adhesive surface of the tag is attached to a cardboard box containing the article. There is.
Since the adhesive layer is formed wide, it is difficult to cleanly remove the adhesive layer from the cardboard box, and a part of the adhesive layer remains on the cardboard box side, and a part of the conductive layer also remains on the article side. Therefore, the resistance value of the conductive layer changes due to the loss of a part of the conductive layer. Therefore, if the resistance value is monitored by the control means, it can be detected that the tag is peeled off from the article.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a tag of an embodiment of an anti-theft device according to the present invention.

FIG. 3 is a circuit diagram of a detection circuit of an embodiment of an anti-theft device according to the present invention.

FIG. 4 is a view showing a tag of another embodiment of the anti-theft device according to the present invention.

FIG. 5 is a view showing a tag of another embodiment of the anti-theft device according to the present invention.

6 is a cross-sectional view of the tag of the anti-theft device shown in FIG.

FIG. 7 is a view showing a tag of another embodiment of the anti-theft device according to the present invention.

8 is a cross-sectional view of the tag of the anti-theft device shown in FIG.

9 is a perspective view of a tag of the anti-theft device shown in FIG. 7. FIG.

FIG. 10 is an explanatory view of a conventional antitheft device.

FIG. 11 is an explanatory diagram of a conventional antitheft device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cardboard box (article, storage box) 10a Lid part 10b Fixed part 20 Tag 21 Phototransistor (light receiving means) 21a Convex part 22 Double-sided adhesive tape (attaching means) 23 Phototransistor (light receiving sensing element) 24 Light guide means 24a Convex part 30 Alarm buzzer (alarm means) 40 Control means 50 Tag 51 Electrode part 52 Conductive part 52a Narrow part 60 Tag 61 Adhesive material 62 Conductive layer 63 Base material B Product

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Ichinomiya 1-7 Yukiya Otsuka-cho, Ota-ku, Tokyo Alps Electric Co., Ltd.

Claims (7)

[Claims] 1. A tag that is attached to an article and can take different states from each other in response to at least the attachment and the detachment, an alarm means, and a different state of the tag that is connected to the tag and detects different states of the tag and responds to the state change. In an anti-theft system including control means for controlling the alarm means, the article is a storage box for storing a product, the tag has a light receiving means, and the light receiving means is embedded in the storage box. The antitheft device, wherein the control means detects the output signal of the light receiving means and drives the alarm means when the output signals are in different states. 2. The antitheft device according to claim 1, wherein the light receiving means is provided with a convex portion for inserting the storage box. 3. The antitheft device according to claim 2, wherein the tag has an attachment means that enables attachment to a storage box. 4. The light receiving means according to claim 1, comprising a light receiving sensing element mounted in the tag body, and a light guiding means capable of guiding light to the light receiving sensing element, for inserting the storage box into the light guiding means. An anti-theft device, characterized in that it is provided with a convex portion. 5. A tag which is installed on an article and can take different states corresponding to a situation different from the installation state, an alarm means, and a different state of the tag which is connected to the tag and detects different states of the tag and responds to the state change. In the anti-theft system including a control means for controlling the alarm means, the article is a storage box for storing a product, and the tag is
Two electrode parts are provided, and a loop-shaped conductive part formed on the peripheral surface of the storage box is extended from the one electrode part and the conductive part is arranged to be crimped to the other electrode part. A theft prevention device, characterized in that a resistance value of the conductive portion is detected by a control means, and the alarm means is driven when different states are caused. 6. The antitheft device according to claim 5, wherein the loop-shaped conductive portion is provided so as to straddle the lid portion of the storage box and the fixed portion of the storage box. 7. A tag which is attached to an article and can take different states from each other in correspondence with at least the attachment and the detachment, an alarm means, and a different state of the tag which is connected to the tag and detects a different state of the tag and responds to the state change. In a theft prevention system including control means for controlling the alarm means, the tag includes a wide adhesive layer, a conductive layer formed on the adhesive layer, and a base material formed on the conductive layer. An anti-theft device, comprising: an adhesive layer of the tag, which is attached to an article; and the control unit detects the resistance value of the conductive layer to drive the alarm unit when different states occur.