JPH11296759A - Burglarproof tag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a burglarproof tag which prevents a commodity from being stolen by surely operating an alarm incorporated in the tag when a wire to attach the tag to the commodity is disconnected. SOLUTION: When a commodity attachment wire 4 is broken, a detection wire 7 is also broken and the function of a voltage generation resistor 12 is lost due to disconnection between a high voltage source and a detection input end 5 of an alarm generator 1, and the voltage of the detection input end 5 is made low to operate the alarm generator 1. When the commodity attachment wire 4 is cut with a metallic tool, the detection wire 7 and a grounding wire 8 are short-circuited through the tool, and the voltage of the detection input end 5 is made low to operate the alarm generator 1. Even if someone tries to cut the commodity attachment wire 4 after short-circuiting the conductor of the detection wire 7, it is difficult to discriminate a wire to be short-circuited, and the alarm generator 1 is operated when the detection wire 7 and the grounding wire 8 are short-circuited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tag for preventing a product from being stolen, and more particularly, to a tag for preventing theft having at least a function of generating an alarm by self-sounding when the product is illegally removed from the product. It is about tags.

[0002]

2. Description of the Related Art Damage caused by theft of goods due to shoplifting is increasing year by year. For this reason, when the product is attached to a product and the product is illegally taken out of the store, an alarm device installed at the entrance is activated, or when the product is improperly removed from the product, the device is provided inside the product. Tags are used to activate alarms. However,
In recent years, with the increase in the number of thefts, the methods have become increasingly malicious, and even for self-sounding tags, the tag is removed from the product by cutting the product attachment line without activating the alarm function. It is the present situation that tricks to steal only are rampant.

[0003]

SUMMARY OF THE INVENTION The present invention provides a theft that can prevent theft by reliably activating an alarm means built in a tag when a product attachment line for attaching the tag to the product is cut. It is intended to provide a tag for prevention.

[0004]

The anti-theft tag according to the present invention comprises a tag body provided with an alarm generator therein, and a product attachment line for attaching the tag body to a product. The alarm generator is configured to deactivate when its detection input is at a high voltage and to activate when its detection input is at a low voltage, and the product mounting wire is connected at one end to the detection input of the alarm generator. It comprises a detection line connected to one end and the other end connected to a high voltage source, and at least one ground line arranged along the detection line and connected to a low voltage source. The detection wire has both ends fixed in the tag body and its outward extension is looped back, and the tag body has the folded end of the outward extension of the detection wire fixed inside it. It is configured to be able to. The detection input terminal of the alarm generator and the one end of the detection line are connected to a low voltage source via a voltage generation resistor.

Accordingly, the anti-theft tag of the present invention is
Since the detection line is also disconnected when the product attachment line is disconnected, the function of the voltage generation resistor is lost by disconnecting the connection between the high voltage source and the detection input terminal of the alarm generator,
As a result, the voltage at the detection input terminal becomes a low voltage, and the alarm generator is activated to warn that the product attachment line has been cut. Also, when the product attachment line is cut with a metal tool such as a knife or pliers, the detection line to be cut and the ground line are short-circuited through the tool, so that the voltage at the detection input terminal becomes a low voltage. Activate the alarm generator.

In recent years, the outer periphery of the portion of the detection wire extending in a loop outward from the tag main body, which is adjacent to the tag main body, is peeled off by heating with a lighter or the like, and the core wire of the detection wire is twisted and short-circuited. By cutting the product attachment line at a portion close to the product, a method of removing and stealing the tag from the product without activating the alarm is widespread. However, the anti-theft tag of the present invention has at least three product attachment lines to be cut, that is,
The detection line and the ground line that are folded in a loop extend in parallel, and the alarm is activated when the detection line and the ground line are short-circuited, making it difficult to determine the line to be short-circuited and preventing theft. Effect can be sufficiently exhibited.

[0007] The anti-theft tag according to the present invention can also apply a ground connected via a voltage generating resistor as a low voltage source, and apply a power supply connected via a current limiting resistor as a high voltage source. it can. The high voltage is a voltage obtained by dividing the power supply voltage by the current limiting resistor and the voltage generating resistor, and the power consumption in the normal state is limited by the value of the voltage generating resistor. Therefore, by maximizing the value of the voltage generating resistor, the life of the battery can be maximized. On the other hand, when the detection line and the ground line are short-circuited, the current flowing from the power supply is limited by the current limiting resistor to avoid losing power, and the operation of the alarm generator can be ensured.

The anti-theft tag according to the present invention is further provided with a plurality of ground lines, each ground line being connected to a low voltage source or the ground, and including a detection line folded in a loop as a ground line. A sheath can also be applied. By increasing the number of ground wires or using a shielded wire sheath for the ground wire, the occurrence of short-circuit between the detection wire and the ground wire can be increased when cutting with a tool, and a more reliable alarm The generator can be activated.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 An anti-theft tag according to an embodiment of the present invention is:
As shown in FIG. 1, the tag body 2 includes an alarm generator 1 therein, and a product attachment line 4 for attaching the tag body 2 to a product 3.

The circuit configuration of the alarm generator 1 is outside the scope of the present invention, and a conventional alarm generation circuit is used to sound a built-in buzzer or to send an alarm signal to an alarm receiver installed in a store. An alarm is issued by doing so. However, the alarm generator 1 has its detection input 5
It is configured to stop operating when (see FIG. 2) is at high voltage and to operate when at low voltage. The size and shape of the tag main body 2 are not particularly limited, but the alarm generator 1 can be built in the tag main body 2 and the one end of the product attaching wire 4 can be electrically connected to the tag main body 4 for reasons that will become clear from the following. It is configured so that it can be connected and fixed, and the other end can be fixed by means that cannot be easily removed.

The product attachment line 4 is provided in a form extending outward from the tag body 2. The product attachment line 4 extends outward from the tag body 2 as shown in FIG.
After the loop 6 is formed at the extension end position, the detection line 7 is disposed so as to be folded back to return into the tag body 2, and the ground extending outward from the tag body 2 along the product attachment line 4. And a line 8.

The detection line 7 and the ground line 8 are provided in an integrated shape, and a person who tries to cut the product attachment line illegally is distinguished from the detection line 7 or the ground line 8. It is preferable to use the same kind of wire so that it cannot be performed. Further, the ground line 8 extends at least to the start or end position of the loop 6 of the detection line 7, and is configured so that its terminal portion is hidden by a suitable clamp member such as a sleeve 9 provided at the position. preferable.
Needless to say, after forming the loop 6 with the ground line 8 in the same manner as the detection line 7, the loop 6 may be provided so as to be folded back into the tag main body 2.

The loop 6 of the product attachment line 4 is
Is passed through an appropriate part of the product 3, and is fixed to a state where it cannot be easily removed by an engaging means provided on the tag body 2. Since the structure of the engaging means is outside the scope of the present invention, its details are omitted, but conventional means such as inserting a fixing pin through the loop 6 to fix the loop 6 may be used.

The detection line 7 has one end connected to the detection input terminal 5 of the alarm generator 1, the other end connected to a power source 11 (usually a battery such as a button battery) via a current limiting resistor 10, and a ground line. 8 is connected to ground. The connection point between the detection line 7 and the detection input terminal 5 of the alarm generator 1 is connected to the ground via a voltage generation resistor 12. Thereby, the alarm generator 1
Is normally connected to the power supply voltage by the current limiting resistor 1.
The voltage divided by 0 and the voltage generating resistor 12 is applied as a high voltage. Current limiting resistor 10 and voltage generating resistor 1
As is clear from the above, the value of 2 is selected so that the ratio of the total resistance of the two and the resistance of the voltage generating resistor 12 is the ratio of the power supply voltage to the high voltage. The power supply 11 secures at least the electric power necessary for the power supply 11 to operate the alarm generator 1 at least for a short time by limiting the current flowing through the current limiting resistor 10 when the detection line 7 described later is short-circuited to the ground line 8. The value is selected as possible.

In the anti-theft tag of the present invention configured as described above, the product attachment wire 4 is passed through an appropriate portion of the product 3, and then the outwardly extending end of the product attachment wire 4, more specifically, It is attached by fixing the loop 6 to the tag body 2. Usually, the current limiting resistor 10 and the voltage generating resistor 12
Is applied as a high voltage to the detection input terminal 5, the alarm generator 1 does not operate. When the product attachment wire 4 is cut off for an illegal purpose such as shoplifting, the voltage between the current limiting resistor 10 and the voltage generating resistor 12 is cut off, so that the divided voltage is lost. Therefore, the detection input terminal 5 of the alarm generator 1 becomes the ground potential, that is, the low voltage, and the alarm generator 1 is activated to generate an alarm. Similarly, when the product attachment line 4 is to be cut with a metal tool such as a knife or pliers, the detection line 7 is short-circuited to the ground line 8 via the metal tool, and the detection input terminal 5 of the alarm generator 1 is connected. When the voltage becomes low, the alarm generator 1 is activated.

On the other hand, when the detection line 7 extending in a loop outward from the tag main body 2 is short-circuited at a portion close to the tag main body 2 to prevent the detection line 7 from being cut off, the product mounting Line 4 has three similar conductors (two reciprocating detection lines 7 and one ground line),
If any one of the two reciprocating detection lines 7 is short-circuited to the ground line 8, the detection input terminal 5 becomes low voltage and activates the alarm generator 1. Therefore, the probability of activating the alarm generator 1 is simply calculated. However, it is 2/3, and there is a great danger to a person who intends to commit fraud, and the effect of preventing shoplifting can be sufficiently exhibited. The probability of activating the alarm generator 1 can be increased by increasing the number of ground lines 8 as illustrated in FIG.

[0017]

[Embodiment 2] Fig. 4 is a view showing an anti-theft tag according to another embodiment of the present invention, which is configured in the same manner as the above embodiment, except that the structure of the product attachment line 4 is different.

The product attachment line 4 in this embodiment extends outward from the tag body 2 as in the previous embodiment, forms a loop 6 at the extended end position of the product attachment line 4, and is then folded back. It has a shield line structure composed of a detection line 7 arranged to return to the inside of the tag main body 2 and a ground line 8a in the form of a sheath containing the detection line 7 therein. The electrical connection between each end of the detection line 7 and the ground line 8a is the same as in the above-described embodiment.

Since the ground line 8a is provided in the form of a sheath, the outer skin, which is a trick of the wrongdoer, is peeled by heating with a lighter or the like, and even if the detection line is to be short-circuited, the detection line 7 is connected to the ground line 8a. Since the detection wire 7 is not reachable because it is wrapped, and when the outer skin of the detection wire 7 is to be heated at the same time, the core wire of the detection wire 7 is exposed within the ground wire 8a, and the detection wire 7 and the ground The line 8a is short-circuited and the alarm generator 1 is activated.

In this embodiment, as shown in FIG. 5, it is also possible to use the ground wire 8a of the sheath shape together with the ground wire 8 of the single linear body used in the embodiment.
Thus, it is easily understood from the above description that it is possible to increase the possibility that the detection line 7 is short-circuited to the ground line and to make it difficult to distinguish the detection line from the ground line.

[0021]

According to the present invention, the alarm generator 1 which operates when the detection input terminal 5 becomes low voltage is used, and the other end of the detection line 7 whose one end is connected to the high voltage is detected. Terminal 5 and the detection input terminal 5 is connected to the voltage generating resistor 12.
Is connected to the low voltage source, the detection input terminal 5 is connected to the low voltage source when the product attachment line 4 is cut off, and the alarm generator 1 can be activated to generate an alarm. . In addition, by arranging the ground line 8 connected to the low voltage source along the detection line 7, when the alarm generator 1 is cut using a metal tool,
The detection input terminal 5 and the ground line 8 are short-circuited, and the detection input terminal 5 can be connected to a low voltage source to operate the alarm generator 1. Further, even if the product attachment wire 4 is cut after the detection wire 7 is short-circuited in the vicinity of the tag body 2,
For the wrongdoer, it is not possible to determine which line is the detection line, and since the probability that the detection input terminal 5 and the ground line 8 are short-circuited is at least 2/3, it cannot be easily short-circuited. Etc. can be effectively prevented.

Further, by connecting the detection input terminal 5 to the ground via the voltage generating resistor 12 and connecting the end of the detection line 7 on the high voltage source side to the power supply 11 via the current limiting resistor 10, A high voltage to the detection input terminal 5 is obtained as a divided voltage of the current limiting resistor 10 and the voltage generating resistor 12, and a current flowing from the power supply 11 to the ground when the detection line 7 is short-circuited to the ground line 8 is changed to a current limiting resistor. 10 limits the operation of the alarm generator 1.

Furthermore, by providing a plurality of ground lines or using a sheath containing a detection line folded in a loop as a ground line, it becomes more difficult to determine the detection line, and at the same time, the detection line is detected. Since the probability of a short circuit between the line 7 and the ground line 8 can be further increased, theft such as shoplifting can be more effectively prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of an anti-theft tag according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a product attachment line of the anti-theft tag shown in FIG. 1;

FIG. 3 is a schematic diagram for explaining a modification of the product attachment line shown in FIG. 2;

FIG. 4 is a view similar to FIG. 2 showing an anti-theft tag according to another embodiment of the present invention;

FIG. 5 is a schematic diagram for explaining a modification of the product attachment line shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Alarm generator 2 Tag body 3 Product 4 Product mounting wire 5 Detection input terminal 6 Loop 7 Detection wire 8, 8a Ground wire 9 Sleeve 10 Current limiting resistance 11 Power supply 12 Voltage generation resistance

Claims (4)

[Claims] 1. An anti-theft tag comprising a tag body provided with an alarm generator therein and a product attachment line for attaching the tag body to a product, wherein the alarm generator detects the detection of the tag. It is configured to stop operation when the input terminal is at a high voltage and to operate when the input terminal is at a low voltage, and the commodity mounting wire has one end connected to the detection input terminal of the alarm generator and the other end connected to the high level. A detection line connected to the voltage source;
At least one ground line arranged along the detection line and connected to a low voltage source, the detection line having both ends fixed in the tag body and having an outwardly extending portion formed in a loop shape. The tag body is provided so as to be able to fix the folded end portion of the outwardly extending portion of the detection line therein, and the detection input end of the alarm generator and the one end of the detection line are provided with a voltage. An anti-theft tag connected to a low voltage source via a generating resistor. 2. The power supply according to claim 1, wherein the low voltage source is a ground connected through a voltage generating resistor, and the high voltage source is a power source connected through a current limiting resistor. Anti-theft tag. 3. The anti-theft tag according to claim 1, wherein a plurality of the ground lines are provided, and each of the ground lines is connected to a low voltage source or a ground. 4. The anti-theft tag according to claim 1, wherein the ground wire is a sheath including a detection wire folded in a loop.