JP4967108B2 - Anti-shoplifting detector - Google Patents

Description

  The present invention is a shoplifting device using radio waves, which is composed of, for example, a gate-shaped detector installed in a place where a person goes in and out, and a sensor attached to each article, for example, a string or a thread in a loop. More particularly, the present invention relates to a loop sensor having conductivity that can be used as a sensor for constituting a radio wave shoplifting prevention device.

  Traditionally, in the retail industry, merchandise that is displayed or displayed for sale and equipment for sale in stores and retail stores that are open during business hours are taken away by the seller without permission from the seller. So-called shoplifting is always a problem.

  As countermeasures, the seller may take measures such as installing a surveillance camera at the sales floor to regularly monitor for abnormalities or hiring a specialized observer to constantly monitor shoplifting. . However, with these methods, there are places where blind spots can be found on surveillance cameras, and if you do not monitor continuously, you will miss when an abnormality occurs. However, this is not necessarily an effective method, and there is a limit to relying on this alone.

  Therefore, a shoplifting prevention device is installed based on the idea that if shoplifting of a product or the like cannot be prevented by human eyes alone, it may be monitored mechanically.

  Briefly explaining the system of the shoplifting prevention device, particularly in the case of high-priced products such as electronic equipment and software, it is used for a magnetic material (used for a system also called a magnetic type or EM) or an IC chip (used for a system called a radio wave type or RF) .) Is attached to or attached to a product and a detector installed at the store entrance is used for detection, and this is also common. Although this method is costly, it can be applied directly to crime prevention measures for individual products, so it is popular in various mass retailers and rental video stores.

  In the case of the magnetic type, magnetism is given by sticking metal foil etc. to the product tag etc., while the detector detects the change in permeability, so the product is illegally taken out. Even so, since the magnetism of the product tag or the like is not cancelled, the detector detects a change in magnetic permeability when passing through the detector, and as a result, illegal passage can be prevented.

  In the case of the radio wave type, a circuit (antenna) having conductivity is built in a product tag or the like, while the detector emits a radio wave and detects a change in a transmission waveform due to resonance. So, even if you try to take the goods illegally, because the conductivity of the product tag etc. is not cancelled, the detector detects the waveform change of the electromagnetic wave when passing the detector, so that illegal passage can be prevented as a result It has become.

  Most of the detectors used in this system are of the gate type provided at the outlet, and so to speak, they can enter and exit through the detector. On the other hand, various types of merchandise tags used in this method have been proposed, but in any case, they are one-dimensional or two-dimensional and must be directly attached to merchandise. For example, the invention described in Patent Document 1 proposes forming a loop using a one-dimensional thread-like magnetic material and attaching it to a product. Further, the invention described in Patent Document 2 proposes a product tag that can be used as a product tag by utilizing a planar shape that can be said to be a two-dimensional shape.

JP 2002-149073 A JP 2004-227508 A

  The invention disclosed in Patent Document 1 prepares a thread-like magnetic body if necessary, and allows both ends to be combined into a loop shape. This is preferable because it can be easily applied to a product, and it is also preferable because it does not impair the appearance of the article. However, if the fixture according to the present invention is used for an anti-shoplifting device, it cannot be applied unless it is a magnetic type, which is a problem. In other words, in the current situation, a simple magnetic type may break through shoplifting prevention devices, and the magnetic type is not enough to monitor and manage many products independently. In this case, it is desired to be compatible with the radio wave type. However, the fixture according to Patent Document 1 cannot be applied to the radio wave type. It is.

  Therefore, Patent Document 2 proposes a flat (tag) shape so as to be compatible with both a magnetic type and a radio wave type. In the invention according to Patent Document 2, since a soft magnetic material is used, it can be applied to a magnetic type, and since a planar loop antenna is used, it can be applied to a radio type.

  However, this Patent Document 2 has a problem that it can only be implemented in the form of a tag having a flat surface. In other words, when a device that operates reliably while securing the necessary length as a loop antenna is considered, the only means existed is to provide an antenna circuit in a plane several centimeters square. And since it must be on a plane, it means that it cannot be made into a string shape as in Patent Document 1. And there was a limit to the products to which this can be applied. In other words, such a flat tag cannot be directly attached to jewelry / precious metal ornaments that are particularly desired to prevent such shoplifting, and therefore there is no choice but to tie the tag with a string. For example, the diameter is 2 cm. There is a business problem because it looks very bad when it is tied to a 3cm square tag using a string to a high-quality ring that is not available. As a result, this is not practical and this tag has some degree of Since the size is necessary, even if this is used for clothing or the like, the tag may be an obstacle to the display of goods, so it is not necessarily preferable.

  From such a situation, it can be said that it is desirable to use a thread-like, string-like or belt-like material as an ingredient used in the shoplifting prevention device that is hardly noticeable and does not disturb the display of goods. There is no material that uses a strip-like or belt-like material that seems to be useful for a radio wave type shoplifting prevention device.

  The present invention has been made in view of such problems, and its purpose is to make a simple thread-like, string-like, or belt-like article a loop, and actually, a radio wave type shoplifting prevention device. It is an object of the present invention to provide an article that can be used as a conductive loop that can be used in a sensor for shoplifting prevention devices.

  In order to solve the above problems, the invention according to claim 1 of the present invention is a shoplifting prevention using radio waves, comprising a detector installed at a place where a person goes in and out and a sensor attached to each article. A sensor used in an apparatus, wherein the sensor includes an antenna unit and a connector unit, and the antenna unit includes a conductive thread having conductivity, an insulating thread having insulation, or the conductive layer. Any one of a plurality of insulated conductive yarns that are insulated from the yarn, and the conductive yarn is a metal wire, a microslit yarn obtained by microslitting a metal foil, a base material Either a microslit yarn obtained by microslit a conductive laminate formed by laminating at least a conductive substance on the surface of the material, or a yarn obtained by subjecting a synthetic fiber to wet plating, or a twisted yarn thereof The number of the conductive yarns used in the antenna unit is N ≧ 1 + a (a is a natural number of 0 or 1 or more). And the insulating yarn is a yarn made of one or more of natural fiber, regenerated fiber, semi-synthetic fiber, or synthetic fiber, and the number M of the insulating yarns used in the antenna unit is M ≧ 1 + a ( a is a natural number of 0 or 1 or more), and the insulated conductive yarn is a twisted yarn obtained by twisting the conductive yarn and the insulating yarn, or an insulating substance is coated on the conductive yarn. In addition, the number P of the insulated conductive yarns used in the antenna unit is P ≧ 1 + a (a is a natural number of 0 or 1 or more), and the connector unit has both ends of the antenna unit. In In addition, each connector part at both ends of the antenna part can be coupled as a pair, and by connecting the connector part, all the conductive yarns constituting the antenna part are connected. It is characterized by a single loop.

  The invention according to claim 2 of the present invention is the detector for a shoplifting prevention device according to claim 1, wherein the connector portion is provided with a chip capacitor, and the connector portion is coupled, The loop is coupled to the chip capacitor.

  Invention of Claim 3 of this invention is a sensor for shoplifting prevention apparatuses of Claim 1 or Claim 2, Comprising: The said antenna part is the said electrically conductive thread | yarn, the said insulating thread | yarn, and the said insulation process completed It is characterized in that it is in the shape of any one of a thread, a string, a conducting wire, or a band using any one of the conductive threads.

  Invention of Claim 4 of this invention is the sensor for shoplifting prevention apparatuses of any one of Claim 1 thru | or 3, Comprising: The said antenna part is the said conductive thread | yarn, the said insulating thread | yarn, And woven with a loom, knitted with a knitting machine, twisted with a twisting machine, or made into a string with a stringing machine using any one of the insulated conductive yarns Or, it is obtained by a plurality.

  The invention according to claim 5 of the present invention is the detector for a shoplifting prevention device according to any one of claims 1 to 4, wherein after the connector portion is coupled once, It is characterized in that it has a configuration in which the coupling can never be released unless a coupling release machine is used.

  As described above, since the detector for a shoplifting prevention device according to the present invention has a configuration including an antenna portion in a one-dimensional state and connector portions at both ends thereof, for example, a single thread-like shape Because it is just a loop by connecting the connector parts at both ends of the string or band, it can be easily attached to the product, and simply by attaching it to the product in this way, it can easily prevent radio wave type shoplifting It can be used as a device sensor, and even if it is attached to an individual product to prevent shoplifting, only a single string in a loop is attached, so the appearance, design, etc. of the product It can be said that it is suitable without interfering. In addition, since a material obtained simply by weaving or twisting the yarn is used, it is possible to easily obtain a unique design, and it may not be a simple inorganic yarn, string or belt loop. It is easy and can be unique.

  And since only the connector parts at both ends of the antenna part are coupled so as to form a single loop, the length of the thread, string or band itself constituting the antenna part is not so long just by devising the antenna part. In any case, a resonant circuit having an arbitrary length can be easily formed, and a loop having an overall length several times the length of the antenna portion can be obtained. For example, when the length of one band is 10 cm and five conductive yarns A to E are used in this band, the end of A-the opposite of the end of A of B By connecting the end portions on the side, the remaining end portion of B-the end portion of C,..., The remaining end portion of E-the remaining end portion of A, and so on, Even if the length of the antenna portion is about 10 cm, the entire thread can be a resonant circuit (loop) having a length of 50 cm.

  In addition, if the resonance circuit, which can only be obtained in two dimensions to obtain the required wavelength in the past, is a sensor according to the present invention, it can be easily realized using a one-dimensional article such as a thread, string or band. It becomes possible. Furthermore, when connecting both ends, a connector part is prepared in advance at both ends, and the connector parts at both ends are paired, and the paired connector parts are connected to each other automatically so that the above-described connection method is obtained. If the connector part is designed in this manner, as a result, a loop having a desired performance can be obtained simply by connecting the connector parts together.

  In addition, it is possible to incorporate a chip capacitor in the connector part and automatically connect the chip capacitor to the loop by connecting the connector part. It can be a circuit. Further, the necessary capacity of the chip capacitor at that time can be easily derived by a calculation formula.

  Embodiments of the present invention will be described below. The embodiment shown here is merely an example, and is not necessarily limited to this embodiment.

  In the following description of the best mode, the same members will be described in advance.

First, the conductive yarn used in the present invention will be described.
The conductive yarn is a conductive yarn and is not particularly limited as long as it is a conventionally known yarn. That is, a metal vapor deposition film obtained by depositing a conductive material, for example, a conventionally known material such as gold, copper, or aluminum on the surface of a polymer resin film such as a polyethylene terephthalate (PET) film or a polyimide (PI) film. It is possible to use a thread formed by chopping the thread as a microslit directly as a thread, or a thread twisted using the thread. In addition, metal wires (electric wires) such as copper wires, nichrome wires, gold wires, silver wires, and yarns twisted using them, copper foils, aluminum foils, silver foils, metal foils such as gold foils, microslits, A thread twisted using these, a conductive thread in which silver or copper is attached to a synthetic fiber thread by wet plating, and the like can be considered.

  As will be described later, in the present invention, this conductive yarn is used together with other yarns, or the conductive yarns are used together. In order to prevent the occurrence of the occurrence, it is considered that the conductive yarn itself is made an insulated conductive yarn as follows.

  The insulation treatment, that is, the insulation treatment for imparting insulation to the conductive yarn will be described. For example, when a film obtained by microslit deposition of a conductive material is used as the conductive yarn, a film serving as a base material Uses an insulating material such as a PET film or a PI film, and a conductive material is vapor-deposited, and an insulating material such as a polyimide resin or a vinyl chloride resin is conventionally known on the surface thereof. This is made into an insulating layer by laminating by a technique, or this film is made into an insulating layer by sticking a PET film or PI film to the surface again, and the laminated film is provided with insulation by micro slitting. It is conceivable to obtain a yarn. In addition, where the conductive layer is exposed in the cut surface obtained by microslitting such a laminated film, after the microslit, by coating the insulating material or the like by any conventionally known technique to the part, Assuming that the conductive layer is wrapped with an insulating layer (substance) in a schematic cross-sectional view, each thread can be made conductive, but at the same time, it can be insulated from the outside. . Naturally, other than such a method, any conductive yarn may be directly coated with, for example, an insulating material. It is also conceivable to provide an insulated conductive yarn by imparting insulation by twisting the wire around the conductive yarn. In any case, literally, the individual conductive yarns are finally subjected to insulation treatment by a conventionally known technique, and further details are omitted here.

Next, the insulating yarn used in the present invention will be described.
As this insulating yarn, it is conceivable to use natural fiber, regenerated fiber, semi-synthetic fiber, synthetic fiber or the like. More specifically, natural fibers such as cotton, morning, silk, and wool, regenerated fibers such as rayon, cupra, lyocell, and polynosic, semi-synthetic fibers such as acetate and promix, polyester, acrylic, nylon, polyurethane, and polyethylene , Synthetic fibers such as polypropylene, vinylon, aramid, etc. may be used, but there is no particular limitation in the present invention, and literally non-conductive, insulating yarn may be used. I refuse to say in advance.

  Incidentally, the reason why this insulating thread is used in the embodiments relating to the present invention to be described later is as follows. It is mainly used for the purpose of preventing short-circuiting between conductive yarns by using woven, knitted, twisted, braided together with conductive yarns. It is also conceivable to use an insulating yarn to increase the breaking strength.

  A shoplifting prevention device using the shoplifting prevention device sensor according to the present invention will be briefly described.

  The shoplifting prevention device envisaged in the present invention is, for example, a store, a rental video shop, a retail store, etc. that handles products of a size that can easily fit in a bag, and has such products hidden in a bag, etc. This is a device for preventing the act of unlawfully taking it out of the store. Specifically, a gate-type detector is provided at the entrance of a store or the like, while each product is provided with a sensor. The purpose of this is to warn or prevent the goods from being taken out of the store illegally by shoplifting by operating these devices in combination.

  This shoplifting prevention device mainly has a magnetic type and a radio type, but both are basically the same, that is, in the case of the magnetic type, the gate is set to detect a change in the magnetic field, On the other hand, the sensor uses a material that generates a magnetic field, such as a magnet, and it is unfairly complained by the fact that the gate detects that the magnetic field changes when the sensor passes through the gate, so that a warning sound is emitted from the gate. Warn or prevent other items from being taken out. In the case of taking it out legally, a process such as canceling the magnetic field generator of the sensor with a dedicated device having a canceller function may be performed in advance.

  On the other hand, in the radio wave type, the gate type detector always generates a radio wave and detects a change in the generated radio wave. On the other hand, the detector basically has an antenna structure, so that the detector generates a gate. Resonance with the radio wave passes through the radio wave, and the gate warns or prevents the product, etc., from being unjustly brought out by sounding a warning sound by detecting this resonance. . In addition, when taking out legally, processing should be performed in advance so that the sensor does not react with the dedicated canceller device so that the sensor does not operate.

  In radio wave type shoplifting prevention devices, it is conceivable to connect a chip capacitor to a loop antenna to strengthen the resonance circuit of the sensor. The capacity of the capacitor used at that time is determined by the following mathematical formula.

ここでｆｒは検知機から出す特定周波数、Ｌはインダクタンス値、Ｃはコンデンサ容量である。

Here, fr is a specific frequency output from the detector, L is an inductance value, and C is a capacitor capacity.

  First, the specific frequency fr to be output from the detector is determined, the inductance value L of the designed antenna is measured with an inductance analyzer, and the respective values are substituted into the above formula to obtain the capacitance C of the chip capacitor necessary for mounting. Can be sought. In this process, the resistance value and length of the conductive yarn used for the antenna and the inductance value measured by the number of loops are naturally different, and the capacitance of the chip capacitor needs to be changed accordingly.

  In addition, the present invention relates to a sensor used to prevent radio wave shoplifting. However, when a magnetic yarn is combined with the antenna part of the present invention, it is possible to make the sensor more resistant to shoplifting by using both the magnetic type and the radio wave type. It is possible to insert an IC chip into the connector part, and the IC chip is automatically connected to the loop by connecting the connector part. Although it may be a sensor for an anti-shoplifting device, further details are omitted here.

  The present invention relates to a sensor used in such a radio wave shoplifting prevention device, and specific examples thereof will be described below.

(Embodiment 1)
A sensor for shoplifting prevention device according to the present invention (hereinafter also simply referred to as “sensor”) will be described as a first embodiment with reference to the drawings.

  The sensor according to this embodiment is used in the radio wave type shoplifting prevention device as described above, and the sensor includes an antenna unit and a connector unit. The antenna unit is formed by using any one of conductive yarns having conductivity, insulating yarns having insulation properties, or insulated conductive yarns that are insulated from the conductive yarns. These conductive yarns, insulating yarns, or insulated conductive yarns are as described above, and in this embodiment, the number N of conductive yarns is N ≧ 1 + a (a is a natural number of 0 or 1 or more. ), The number M of insulating yarns is M ≧ 1 + a (a is a natural number of 0 or 1 or more), and the number P of insulated conductive yarns is P ≧ 1 + a (a is a natural number of 0 or 1 or more). ). The connector portion is provided at both ends of the antenna portion, and the connector portions at both ends of the antenna portion can be coupled as a pair, and the antenna portion is configured by coupling the connector portions. All the conductive yarns are connected to form a single loop.

Hereinafter, description will be made in order.
The sensor includes an antenna part and a connector part. First, the antenna part will be described.
FIG. 1 is a diagram showing a concept of an antenna unit 10 of a sensor according to the present embodiment. This figure is merely a conceptual diagram, and is not limited to the insulation thread 12 simply wrapped with the insulated conductive thread 11 as shown in the figure, and even a more complicated knitting method may be used. It should be noted that here, in order to facilitate the explanation, it is preliminarily declined to be illustrated in a very simplified state. Further, in the following description, the insulating thread 12 is used as a core thread, and the insulated conductive thread 11 is wound around the insulating thread 12, but other than this, for example, the conductive thread may be used instead of the insulated conductive thread 11. It may be used, or may be a combination other than that, and in any case, it is previously refused that the basic idea of the configuration is the same.

  The antenna unit 10 according to the present embodiment is composed of an insulated conductive thread 11 and an insulating thread 12. The actual configuration of the insulated conductive yarn 11 used here is a configuration in which the conductive yarn is a core, and the insulating yarn is wound around the outer side by a twisting machine so that even if it is in contact with other conductive yarns 11, it is not electrically short-circuited. It is said. Here, the insulating yarn wound around the outside may be the same as the insulating yarn 12 used as the core yarn, or may be a different insulating yarn. The antenna unit 10 according to the present embodiment is a braid using one insulating thread 12 and five insulated conductive threads 11. Moreover, the breaking strength of the antenna unit 10 of the present embodiment can be increased by using the insulating yarn 12 as a core yarn. Here, although an example of the shape of the braid by the string making machine has been given, the shape of the antenna unit 10 may be made by weaving with a loom, knitting with a knitting machine, or twisting with a twisting machine. In addition, here, since the insulated conductive yarn 11 is used, even if the insulated conductive yarns 11 come into contact with each other, there is no electrical short-circuit, but if a conductive yarn is used, a braid is used. At this time, it should be mentioned that the braided cord should be knitted by winding the conductive yarn around the core yarn so that the conductive yarns do not contact each other so as not to cause an electrical short circuit.

  Then, both end portions of the five insulated conductive yarns 11 are led out as terminals. More specifically, the insulating yarn is not wrapped around the conductive yarn 11 at the end of the insulated conductive yarn 11, and the conductive yarn itself is exposed, and this is used as a terminal. Here, both end portions of each conductive yarn 11 are aA, bB, cC, dD, and eE. (A, b,... Indicate the lead-out portion of each conductive yarn 11, and A, B,... Indicate the lead-out portion on the opposite side.)

  When the antenna unit 10 is prepared in this manner, as shown in the conceptual diagram of the connector unit shown in FIG. 10 at the end. Here, there is no particular limitation on the method for introducing the lead-out portion into the connector portion. Similarly, the lead-out portions A, B, C, D, and E on the opposite side are used in the same manner as described above to form the connector portion 32 provided on the opposite side of the antenna portion 10.

  The connector portions 31 and 32 will be described in advance. When the connector portion 31 and the connector 32 are joined, a-B, b-C, c-D, d-E, and e-A are joined to each other to conduct electricity. A thread forms a loop-like circuit. It should be noted that there is no limitation as long as the conductive yarns form a single loop circuit when bonded in this way.

  It should be noted that the shape, appearance, and the like of the connector portion are not limited at all, and it can be said that it is preferable that these are in a concave-convex relationship and can be easily coupled. It can be said that it is preferable to have a configuration in which this cannot be released after being coupled, or a configuration in which the coupling can never be released unless a dedicated decoupling machine is used. Hereinafter, in this embodiment, the description will be further continued on the assumption that the connection can never be canceled unless a dedicated bond releaser is used.

  The connector units 31 and 32 will be further described. When the sensor according to the present embodiment is actually used as a shoplifting prevention tag, the antenna unit 10 is, for example, a product quality display tag when attached to each product. Since the attachment is completed simply by connecting the connector portions 31 and 32 after passing through the portion, it can be said that the connector portions 31 and 32 are preferably as small and compact as possible. In addition, if you do not make it impossible to release after joining, the person who is actually shoplifting will be easily released when trying to shoplift the product, and as a result, the detector for shoplifting prevention device in the first place It is because the role as is no longer played. Furthermore, from this point of view, it is still desirable that the antenna unit 10 itself be configured to be difficult to cut, but the description thereof will be omitted.

  In addition, it can be said that it is preferable from the viewpoint of recycling if the connection between the connector portions 31 and 32 cannot be released unless it is a dedicated connection release machine. In other words, for example, at the merchandise payment register counter, the connection between the connector portions 31 and 32 is released by using this exclusive decoupling machine, and the sensor is detached from the merchandise and stored, so that it can be stored in another newly received merchandise. On the other hand, this sensor can be reused. As a result, the sensor according to the present embodiment can be reused any number of times, so that the so-called running cost can be suppressed, which is preferable. . In addition, since there is also a security request, a specific description of this dedicated uncoupling machine and a specific example of the coupling that can never be released without using this will be omitted here.

  The connector portions 31 and 32 used in the sensor according to this embodiment will be further described. While referring to the schematic diagram relating to the connector portions 31 and 32 in FIG. 2, how to incorporate the ends a, b, c, d, and e of the insulated conductive yarn 11 inside the connector portions 31 and 32. To explain, the connector part 31 is a, b, c, d, e in order from the left, whereas in the connector part 32 as a pair, the relative parts (contact parts) are B, C, D, E, A. It is said. That is, when the connector part 31 and the connector part 32 are connected as they are, the contacts in the relative part are connected. At that time, the end portions of the insulated conductive yarns 11 are shifted one by one as described above. In the end, the whole is made into one loop.

  That is, as shown in the schematic diagram, by connecting the connector portions 31 and 32 provided at both ends of the antenna portion 10, the end portions of the insulated conductive yarns 11 constituting the antenna portion are In this case, B is connected to b, C is connected to b, and A is connected to e. As a result, all the insulated conductive yarns are connected to one loop. is there.

  That is, for example, if the insulated conductive yarn 11 has a single length of 10 cm, the loop obtained by the present embodiment does not have five individual rings with a total length of 10 cm, but a spiral with a total length of 50 cm. A loop is completed.

  The length of the loop may be determined arbitrarily. For example, if the length of the loop needs to be 50 cm, five 10 cm conductive yarns 11 may be used, and if the length of 75 cm is required. 5 conductive yarns 11 of 15 cm may be used. In the above description, five conductive yarns 11 are used. However, the number is not limited to this number, and any number of one or more conductive yarns 11 may be used. For example, if the loop length is 10 cm, one 10 cm conductive thread may be used, and if it is 48 cm, various combinations such as four 12 cm ones may be considered. It is.

  In the shoplifting prevention sensor described above, it is conceivable to provide a chip capacitor in one or both of the connector portions 31 and 32. Although the detailed configuration is omitted here, the important point is that when the connector portion 31 and the connector portion 32 are combined into one loop, a chip capacitor is connected to the loop. That is, one or both of the connector portions 31 and 32 are prepared. That is, by connecting the connector part 31 and the connector part 32, a capacitor is automatically connected to the loop circuit, and as a result, the antenna operates as a more powerful antenna. As a result, the sensitivity of the shoplifting prevention tag is increased. It becomes possible to raise more.

(Embodiment 2)
In the first embodiment, the detector for a shoplifting prevention device having a conductor-like (or thread-like) appearance has been described. However, in the case where the antenna portion has a flat band shape and a string shape, the second embodiment is described. Will be described.

  In addition, although the strip | belt shape (or string shape) shown here has shown the external appearance like the strip | belt-shaped bookmark attached to the paperback book etc., it refuses beforehand that it is not necessarily limited to the external appearance.

  The structure of the sensor according to the present embodiment is the same as that of the sensor described in the first embodiment, that is, is configured by an antenna section and a connector section. Also in the antenna portion, as in the previous embodiment, the antenna portion is made of a conductive yarn having conductivity, an insulating yarn having insulation, or an insulated conductive yarn obtained by insulating the conductive yarn. These conductive yarns, insulating yarns, or insulated conductive yarns are as described above, and in this embodiment, the number N of conductive yarns. Is N ≧ 1 + a (a is a natural number of 0 or 1 or more), the number M of insulating yarns is M ≧ 1 + a (a is a natural number of 0 or 1 or more), and the number P of insulated conductive yarns P Is P ≧ 1 + a (a is a natural number of 0 or 1 or more). The connector portion is provided at both ends of the antenna portion, and the connector portions at both ends of the antenna portion can be coupled as a pair, and the antenna portion is configured by coupling the connector portions. All the conductive yarns are connected to form a single loop.

  However, in the second embodiment, the shape of the antenna portion is different from that in the previous embodiment. That is, it is an appearance that can be said to be a flat band shape, and a conceptual diagram thereof is shown in FIG. FIG. 3 is a diagram showing the concept of the antenna unit 20 of the sensor according to the present embodiment. This figure is a mere conceptual diagram, and is not simply a straight line joined as shown in the figure. For example, a plain weave, a three-slanted pattern, a four-slanted pattern, a five-pointed satin, It may be woven fabrics such as satin weave and back satin weave, and various knitted fabrics other than these can be captured in the same way, but here it is very simplified for ease of explanation. It is refused beforehand that it is what was illustrated in the state which carried out. In FIG. 3, the opposite side of “a” in the drawing is “B” (omitted in the middle), but both ends of one conductive thread 11 are “A” with respect to “a”. , “B” for “b”, “E” for “e”, but the above deviation is intended to simplify the adapter installation. For example, as shown in FIG. 4, the attachment of the connector portion is complicated, but “A” is located at a portion corresponding to “a”. Therefore, it can be simplified from the viewpoint of the method of weaving.

  Further, as shown in FIG. 3, the sensor according to the second embodiment includes the insulated conductive yarn 11 and the insulating yarn 12, but is not limited thereto. In the case of this embodiment, unlike the antenna portion of the sensor described in the first embodiment, it is planar or flat, and the total amount of yarn required is also that of the first embodiment. In some cases, the number of the conductive yarns may increase, and although the insulated conductive yarn 11 is used, the insulating yarn 12 is used to ensure the insulation of the conductive yarn more reliably. Further, there are various methods of weaving and knitting so that the conductive yarns do not contact each other even if conductive yarns are used instead of using the insulated conductive yarns 11 as compared with the first embodiment. Therefore, the conductive yarn may be used on the assumption that it is woven or knitted as such, but since the basic configuration and concept are the same, in the following description, the insulated conductive yarn 11 and the insulating yarn 12 are used. The description will be continued assuming that

  The concept of the antenna unit 20 of the sensor according to the present embodiment is the same as that in the first embodiment. That is, in the case illustrated in FIG. 3, both ends of the antenna unit 20 woven into a flat belt shape using the five insulated conductive yarns 11 and the insulating yarns 12 are derived, and the antenna unit 20 The lead-out portions at both ends are coupled using the connector portions 31 and 32, but are coupled so as to be shifted one by one, resulting in a coupling that forms one loop as a whole. The portion to be derived is the same as that described in the first embodiment, and the description thereof is omitted here.

  The difference from the first embodiment is that it is flat as described repeatedly, but by being flat, the design is better than in the case of the first embodiment. Can be easily imparted to the antenna unit 20.

  That is, it is woven into a flat band or string using the insulated conductive thread 11 and the insulating thread 12, but in short, this is exactly the same as the process of making a band or string by weaving a normal thread. That is, for example, it is possible to present a design that is not monotonous by selecting the color of the yarn to be used, and more specifically, for example, plain weave, three-slanted pattern weave, four-slanted pattern weave, five-sheet satin weaving, double satin weaving By using a complicated weaving method, such as back satin weaving, it can be made into a belt-like shape with a certain degree of design.

  And by giving designability, it may be possible to give new designability to products that use the sensor according to this embodiment, and if it is designed to give off a strong presence, When the sensor according to the embodiment is actually used in a product, it also emphasizes the existence of the shoplifting prevention device itself, which in turn leads to the effect of giving up shoplifting itself psychologically, that is, preventing shoplifting. That is also possible.

  In addition, since the antenna unit 20 can be obtained by weaving and knitting only with yarn, the antenna unit 20 is woven with a loom using the insulated conductive yarns 11 and the insulating yarns 12 in order to make the antenna unit 20 into a strip shape. Any of these can be said to be obtained by any one or more of knitting with a knitting machine, twisting with a twisting machine, and stringing with a stringing machine. It can be said that it is suitable because it can be used for production as it is.

  The connector portions 31 and 32 connected to both ends of the antenna portion 20 are the same as those in the first embodiment described above. That is, the connector portions 31 and 32 are easily combined. Since it is the same for the case where the connection is shifted one by one, the case where it is possible to release the connection without using a dedicated device once the connection is made, and the provision of the chip capacitor is the same, further explanation will be given here. Is omitted.

  Note that the displacement of both end portions described in the explanation of FIG. 3 is configured so that the end portions are connected in the form of being displaced one by one in the connector portions 31 and 32 after all. In other words, it is only necessary to adjust the deviation occurring at the end portion in the connector portions 31 and 32.

It is the schematic which showed an example of the antenna part which comprises the sensor concerning this invention. It is the conceptual diagram which showed an example of the connector part which comprises the sensor concerning this invention. It is the schematic which showed another example of the antenna part. It is the schematic which showed an example of the antenna part by the weaving method different from FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Antenna part 11 Conductive thread 12 Insulating thread 20 Antenna part 31 Connector part 32 Connector part

Claims (5)

A detector used in a shoplifting prevention device using radio waves, comprising a detector installed at a place where people go in and out and a sensor attached to each article,
The sensor comprises an antenna part and a connector part,
The antenna unit is formed using any one of a conductive yarn having conductivity, an insulating yarn having insulation, or an insulated conductive yarn obtained by performing an insulation treatment on the conductive yarn. And
The conductive thread is a metal wire, a micro slit thread formed by micro slitting a metal foil, a micro slit thread formed by micro slitting a conductive laminate formed by laminating at least a conductive material on the surface of a base material, or a synthesis Any one of yarns obtained by wet-plating fibers or twisted yarns thereof, or any one or more of these yarns are twisted with other yarns, and used in the antenna section The number N of conductive yarns is N ≧ 1 + a (a is a natural number of 0 or 1 or more),
The insulating yarn is a yarn made of one or more of natural fiber, regenerated fiber, semi-synthetic fiber, or synthetic fiber, and the number M of the insulating yarns used in the antenna unit is M ≧ 1 + a (a is 0) Or a natural number of 1 or more).
The insulated treated conductive yarn is a twisted yarn obtained by twisting the conductive yarn and the insulating yarn, or the conductive yarn is coated with an insulating material, and is used in the antenna unit. The number P of the insulated conductive yarns is P ≧ 1 + a (a is a natural number of 0 or 1 or more),
The connector part is provided at both ends of the antenna part, and each connector part at both ends of the antenna part can be coupled as a pair.
By connecting the connector part, all the conductive yarns constituting the antenna part are connected to form a single loop,
A sensor for shoplifting prevention devices. The detector for a shoplifting prevention device according to claim 1,
A chip capacitor is provided in the connector portion, and the loop is coupled to the chip capacitor by coupling the connector portion;
A sensor for shoplifting prevention devices. A sensor for shoplifting prevention device according to claim 1 or claim 2,
The antenna portion is in the shape of any one of a thread, a string, a conducting wire, or a band formed using any one of the conductive thread, the insulating thread, and the insulated conductive thread;
A sensor for shoplifting prevention devices. The detector for a shoplifting prevention device according to any one of claims 1 to 3,
The antenna unit is woven with a loom, knitted with a knitting machine, or twisted with a twisting machine, using any one of the conductive yarn, the insulating yarn, and the insulated conductive yarn. To be obtained by one or more of making a string with a string making machine,
A sensor for shoplifting prevention devices, characterized by The detector for a shoplifting prevention device according to any one of claims 1 to 4,
Once the connector part has been joined, it has a configuration that can never be released unless a dedicated release machine is used.
A sensor for shoplifting prevention devices.

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