EP0686950A1 - Anti-theft electronic security device - Google Patents

Anti-theft electronic security device Download PDF

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Publication number
EP0686950A1
EP0686950A1 EP94810341A EP94810341A EP0686950A1 EP 0686950 A1 EP0686950 A1 EP 0686950A1 EP 94810341 A EP94810341 A EP 94810341A EP 94810341 A EP94810341 A EP 94810341A EP 0686950 A1 EP0686950 A1 EP 0686950A1
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EP
European Patent Office
Prior art keywords
coil
code
fixed
electronic
component
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP94810341A
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German (de)
French (fr)
Inventor
Ake Gustafson
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Individual
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Individual
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Priority to EP94810341A priority Critical patent/EP0686950A1/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1445—Mechanical actuation by lifting or attempted removal of hand-portable articles with detection of interference with a cable tethering an article, e.g. alarm activated by detecting detachment of article, breaking or stretching of cable

Definitions

  • the present invention relates to an electronic theft security device, intended to be fixed against the object to be monitored and comprising means of connection to a central monitoring station.
  • the device according to the invention comprises in particular an electromagnetic transponder consisting of an electronic circuit element comprising an electronic code and connected to a coil generally acting as an antenna.
  • transponders are already used for many applications, in particular for sealing or marking objects, as described in applications WO93 / 12513 and European application 93810267.0
  • the present application relates to a particular application of such a transponder to a security device against theft.
  • the fixing cable comprises two electrical conductors, the point of fixing of the cable on the object comprising means for interrupting the continuity of the electric circuit when the object is detached from the cable. The resulting circuit interruption causes an alarm.
  • An object of the present invention is to provide a security device for objects as mentioned above which, when it is separated from the object to be protected, signals this fact and indicates which object is in question, this by electronic means requiring only very simple wiring in the shelving as well as for the device, the various elements constituting the overall security system also being simple in design.
  • Another object of the invention is to provide a reliable security device and low cost of use.
  • yet another object of the invention is to be able to associate the security device with a device for marking an object.
  • FIG. 1 shows a portion of an object to be protected 1, in particular comprising a portion of planar wall 10, on which is installed a security device 2 connected to a security installation shown diagrammatically at 3 by means of connection means 30, 34 and 35.
  • the object to be protected 1 can be any, the main being that it has a flat wall portion 10 of a few cm2 which can receive the safety device 2.
  • This is mainly composed of a first portion 20 comprising an electronic component 2 coded and a second portion 21 for activating and reading the code.
  • the electronic component 22, preferably an integrated circuit further comprises two terminals connected together by means of a thin wire forming a coil 23.
  • the coil 23 has only been shown with a single turn, but it is understood that it can include a large number of turns.
  • Component 22 and part of the coil 23 are housed in an encapsulation 24, preferably made of synthetic material.
  • the encapsulation 24 is shown here as if it were transparent in order to show the elements it contains.
  • the face of the encapsulation 24 facing the object to be protected 1 is covered with an adhesive layer 25, at least a portion of the length of the fine wire constituting the coil 23 being included in this adhesive layer.
  • the second portion 21 for activating and reading the code comprises another coil 26, which is also included in an encapsulation 27 similar to the previous one.
  • the two portions 20 and 21 of the safety device also comprise, on their adjacent faces, a detachable connecting device 28, consisting for example of an adhesive tape on its two sides or of two portions of a strip of VELCRO type (brand deposited), thus making it possible to connect or separate the portions 20 and 21 of the device.
  • the portion 21 of the security device 2, respectively the coil 26 is connected by a two-wire electric cable 30 to a central unit 31 of the security installation 3.
  • the central unit 31 comprises display means , for example a screen 32 as well as data input means, shown diagrammatically by the keyboard 33.
  • One or more data transmission buses 34 are connected to the central unit 31 of the connectors being arranged on said bus, to which connection cables 30 can be connected.
  • the cable 30 will be provided with a sheath having a relatively high mechanical resistance or else will also comprise a mechanically resistant element, such as for example a steel cable, in order to offer a mechanical tensile strength constituting a first element of deterrent against theft.
  • the connectors 35 preferably comprise means preventing their disconnection by a simple tractor, either by a bayonet system, or by a screw or snap system; the mechanical resistance offered by each connector 35 is preferably coordinated with the mechanical resistance offered by the cable 30 as mentioned.
  • a determined electronic alphanumeric code was introduced into the component 22 during its manufacture or else during the installation of the device 2 on the object 1, after which this code is locked, that is to say that it cannot be altered or modified.
  • the electronic component 22 responds to its code when it is activated by an HF signal from the coil 26; this code is then read by the coil 26, the transmission being effected by inductive coupling between the coils 23 and 26 acting as antennas, then is transmitted to the central unit 31 where it is checked.
  • the electronic component 22 therefore does not have any specific power supply means, being only activated by the HF interrogation signal from the coil 26.
  • the central unit 31 is arranged in a place in the store that is easily monitored at all times, for example near the store cash register, and very simple wiring is provided through the shelving since it consists of one or more cables or buses 34, with a single bus 34 for shelving or a plurality of shelving, a plurality of connectors 35, one for each object to be protected, being installed on each bus and regularly arranged on the shelving.
  • the installation can be very discreet since in fact a single cable, a bus 34, passes along the shelving.
  • the first portion 20 of a safety device is affixed, to which the second portion 21 is applied by means of the fixing device 28.
  • the code has been entered in the component 22 during from its manufacture, it is then introduced into the central unit 31, either by the keyboard 33, or by an automatic reading; in the case where the code can be chosen during installation, it is now chosen and is introduced by the same means both in the component 22 and in the central unit 31.
  • the central unit 31 interrogates sequentially each security device 2 for reading the code written in the corresponding component 22 and signals, on the screen 32 and / or by an auxiliary acoustic or light device 36, the case where a code cannot be read correctly.
  • each object 1 to be monitored is provided with a device 2, which is sequentially interrogated by the central unit 31 in order to control its own code and to detect any damage to said security device, respectively an attempted theft. Since each device 2 responds to its own code, the central unit 31 indicates which object is no longer responding to its code, which facilitates the intervention of store staff.
  • the seller deactivates the code in question via the keyboard 33 and can detach the two portions of the device 2 without an alarm being signaled.
  • the portion 20 can remain attached to the object provided that it has been arranged on a non-visible face, for example the rear face or the bottom face of the 'apparatus.
  • a smaller object for example a camera, it is necessary to detach the portion 20, by suitable means available to the seller.
  • each component 22 of the portion 20 responds to a particular code, it is also possible to use this code later for recognition of the object in question, this code then being able to correspond for example to the serial number of the object in question, number which is generally engraved in an appropriate place of the object.
  • the advantage of recognition by electronic code rather than by engraved number lies in the inviolability of the code while the engraving can be erased.
  • the procedure is rather as shown in Figure 2 where the portion 20 is directly included in the object 1 during the manufacture of the latter. It suffices then, for the exposure in store, to stick a portion of fixing band 28 near the portion 20 by an adhesive 25, and to fix there a second portion 21 similar to that described above.
  • the protective effect is the same as that described above with the additional advantage that the code contained in the circuit 22 can be read later, when the device 1 has been purchased, by means of a suitable transmitter-detector in order to to verify the serial number of the device. This subsequent reading allows the device to be checked for maintenance or else allows verification in the event of theft. In the case of such use, it is preferable that the code is introduced into component 22 at the factory.
  • FIG. 3 shows a simpler embodiment of a security device 2, composed only of a portion 20 comprising an electronic component 22 responding to a code, this component being able to transmit its code only when an electrical connection in fine wire 23 connects two of its terminals.
  • the component 22 is directly interrogated via the cable 30.
  • FIG 4 An embodiment derived from the previous one is shown in Figure 4, where the cable 30 here consists of a narrow and flexible strip of synthetic material 37 (PCB), on which the two electrical connections are made by metallized tracks 38.
  • the component 22 containing the code is connected to the metallized tracks 38 by means of two fine wire connections 29 embedded in the mass of adhesive 25.
  • the device 2 is covered with an encapsulation 24 made of synthetic material. An attempt to tear off the device 2 from the object 1 or to cut the cable 30 will also have the effect of interrupting the reading of the code and of signaling an alarm.
  • the complete anti-theft surveillance system is relatively inexpensive since, as already seen previously, the wiring in the shelving is very simple; on the other hand, in the case of the embodiment corresponding to Figure 1, the cable 30 and the portion 21 of the device generally remain attached to the shelving, and it suffices to have in stock a series portions 20 which will be fixed to the objects to be protected. These portions 20 which can be considered as consumable elements do not excessively increase the cost of using the system given the low cost price of the coded components 22. In the case of the embodiment of FIG. 2, the cost of use is even less expensive since the only consumable element is one half of the fixing device 28, the cost of the portion 20 can be included in that of the object 1 since it can be used later for its identification. In the case of form of executions corresponding to FIGS. 3 and 4, the consumable material is slightly more expensive since the portion 20 as well as at least part of the cable 30 are consumable, although possibly being regenerated.
  • the safety device 2 has been described passing through the bus 34, but other connection means are also possible, in particular some safety devices 2 can be connected to a transmitter device. receiver by radio waves, infrared radiation or other electromagnetic radiation at the monitoring station, possibly without going through bus 34.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The security device (2) is attachable to an object which is to be protected against theft. This includes an electronic identity circuit (22) linked to an aerial (23) embedded within a housing (24). A second unit of similar size (21) is fastened to the identity circuit by hooked pile fastener (28), and includes a second aerial enabling communication between the two units. The second unit is connected by cable (30) to a central monitoring station (31) which is able to read the identity of the attached unit, and monitors its continued presence. In the event of any attempted theft, the lack of an identified unit adjacent to the aerial (26) activates an alarm. <IMAGE>

Description

La présente invention concerne un dispositif électronique de sécurité contre le vol, destiné à être fixé contre l'objet à surveiller et comportant des moyens de liaison vers une centrale de surveillance.The present invention relates to an electronic theft security device, intended to be fixed against the object to be monitored and comprising means of connection to a central monitoring station.

Le dispositif selon l'invention comprend en particulier un transpondeur électromagnétique constitué d'un élément de circuit électronique comportant un code électronique et relié à une bobine faisant généralement office d'antenne.The device according to the invention comprises in particular an electromagnetic transponder consisting of an electronic circuit element comprising an electronic code and connected to a coil generally acting as an antenna.

De tels transpondeurs sont déjà utilisés pour de nombreuses applications, en particulier pour le scellage ou le marquage d'objets, comme décrit dans les demandes WO93/12513 et européenne 93810267.0
   La présente demande concerne une application particulière d'un tel transpondeur à un dispositif de sécurité contre le vol.Such transponders are already used for many applications, in particular for sealing or marking objects, as described in applications WO93 / 12513 and European application 93810267.0
The present application relates to a particular application of such a transponder to a security device against theft.

Dans de nombreux commerces, les objets en vente sont exposés de manière à pouvoir être examinés de près par les clients, voire même de manière à pouvoir être manipulés par ceux-ci. Lorsqu'il s'agit d'objets d'une certaine valeur, ils sont généralement protégés par un câble métallique fixé d'une part à l'objet et d'autre part au rayonnage. Ce système de protection est peu fiable et assez onéreux, dans la mesure où il suffit de couper le câble pour s'emparer de l'objet, sans qu'une alarme quelconque ne soit déclenchée. Ce système nécessite en outre des moyens de fixation sur l'objet, moyens qui ne sont pas toujours évidents à réaliser selon la forme dudit objet. Dans un système plus élaboré, le câble de fixation comprend deux conducteurs électriques, le point de fixation du câble sur l'objet comportant des moyens d'interruption de la continuité du circuit électrique lorsque l'objet est détaché du câble. L'interruption de circuit qui en résulte provoque une alarme. Dans ce cas, et pour un système bon marché, tous les circuits sont montés en série, l'interruption d'un seul circuit provoquant l'alarme sans qu'il soit possible de détecter quel est le circuit ayant commandé l'alarme respectivement l'objet qui a été dérobé; pour un système nettement plus onéreux, chaque circuit est relié indépendamment au dispositif central de contrôle, ce qui permet alors de distinguer le circuit interrompu mais avec un réseau de câbles important dans les rayonnages et un dispositif central de contrôle compliqué.In many shops, objects for sale are displayed so that they can be examined closely by customers, or even so that they can be handled by them. When it comes to objects of a certain value, they are generally protected by a metal cable fixed on the one hand to the object and on the other to the shelving. This protection system is unreliable and quite expensive, since it suffices to cut the cable to take possession of the object, without any alarm being triggered. This system also requires fixing means on the object, means which are not always easy to produce depending on the shape of said object. In a more elaborate system, the fixing cable comprises two electrical conductors, the point of fixing of the cable on the object comprising means for interrupting the continuity of the electric circuit when the object is detached from the cable. The resulting circuit interruption causes an alarm. In this case, and for a cheap system, all the circuits are connected in series, the interruption of a single circuit causing the alarm without it being possible to detect which circuit has commanded the alarm respectively. object that has been stolen; for a much more expensive system, each circuit is independently linked to the central control device, which then makes it possible to distinguish the interrupted circuit but with a large network of cables in the shelving and a complicated central control device.

Un but de la présente invention est de proposer un dispositif de sécurité pour des objets tels que mentionnés ci-dessus qui, lorsqu'il est séparé de l'objet à protéger signale ce fait et indique quel est l'objet en question, ceci par des moyens électroniques ne nécessitant qu'un câblage très simple dans les rayonnages ainsi que pour le dispositif, les divers éléments constituant le système global de sécurité étant aussi simples de conception.An object of the present invention is to provide a security device for objects as mentioned above which, when it is separated from the object to be protected, signals this fact and indicates which object is in question, this by electronic means requiring only very simple wiring in the shelving as well as for the device, the various elements constituting the overall security system also being simple in design.

Un autre but de l'invention est de proposer un dispositif de sécurité fiable et de faible coût d'utilisation.Another object of the invention is to provide a reliable security device and low cost of use.

Enfin, encore un autre but de l'invention est de pouvoir associer le dispositif de sécurité à un dispositif de marquage d'un objet. Ces différents buts sont obtenus par un dispositif possédant les caractéristiques mentionnées dans les revendications.Finally, yet another object of the invention is to be able to associate the security device with a device for marking an object. These various aims are obtained by a device having the characteristics mentioned in the claims.

Plusieurs formes d'exécution d'un dispositif de sécurité selon l'invention sont décrites ci-après en regard du dessin comportant les figures ou:

  • la figure 1 représente une première forme d'exécution d'un dispositif de sécurité selon l'invention connecté à une installation de sécurité,
  • la figure 2 représente une variante de la forme d'exécution précédente,
  • les figures 3 et 4 représentent d'autres formes d'exécution de dispositifs de sécurité selon l'invention.
Several embodiments of a safety device according to the invention are described below with reference to the drawing comprising the figures or:
  • FIG. 1 represents a first embodiment of a security device according to the invention connected to a security installation,
  • FIG. 2 represents a variant of the previous embodiment,
  • Figures 3 and 4 show other embodiments of safety devices according to the invention.

La figure 1 montre une portion d'un objet à protéger 1, comportant en particulier une portion de paroi plane 10, sur laquelle est installé un dispositif de sécurité 2 relié à une installation de sécurité représentée schématiquement en 3 par l'intermédiaire de moyens de liaison 30, 34 et 35. L'objet à protéger 1 peut être quelconque, le principal étant qu'il présente une portion de paroi plane 10 de quelques cm² pouvant recevoir le dispositif de sécurité 2. Celui-ci est composé principalement d'une première portion 20 comportant un composant électronique 2 codé et d'une deuxième portion 21 d'activation et de lecture du code. Le composant électronique 22, de préférence un circuit intégré, comporte en outre deux bornes reliées entre elles au moyen d'un fil fin formant une bobine 23. Pour la clarté de la figure, la bobine 23 n'a été représentée qu'avec une seule spire, mais il est bien entendu qu'elle peut comporter un grand nombre de spires. Le composant 22 ainsi qu'une partie de la bobine 23 sont logés dans un encapsulage 24, de préférence en matériau synthétique. L'encapsulage 24 est représenté ici comme s'il était transparent afin de montrer les éléments qu'il contient. La face de l'encapsulage 24 tournée vers l'objet à protéger 1 est recouverte d'une couche adhésive 25, au moins une portion de longueur du fil fin constituant le bobinage 23 étant incluse dans cette couche adhésive. La deuxième portion 21 d'activation et de lecture de code comprend une autre bobine 26, elle aussi comprise dans un encapsulage 27 semblable au précédent. Les deux portions 20 et 21 du dispositif de sécurité comprennent encore, sur leurs faces adjacentes, un dispositif de liaison détachable 28, constitué par exemple d'un ruban autocollant sur ses deux faces ou de deux portions d'une bande de type VELCRO (marque déposée), permettant ainsi de relier ou séparer les portions 20 et 21 du dispositif. La portion 21 du dispositif de sécurité 2, respectivement la bobine 26 est reliée par un câble électrique bifilaire 30 à une centrale 31 de l'installation de sécurité 3. Comme on le voit sur la figure, la centrale 31 comprend des moyens d'affichage, par exemple un écran 32 ainsi que des moyens d'introduction de données, schématisés par le clavier 33. Un ou plusieurs bus de transmission de données 34 sont reliés à la centrale 31 des connecteurs étant disposés sur ledit bus, auxquels des câbles de liaison 30 peuvent être connectés. De préférence le câble 30 sera muni d'une gaine ayant une relativement forte résistance mécanique ou alors comprendra aussi un élément résistant mécaniquement, comme par exemple un câble d'acier, afin d'offrir une résistance mécanique à la traction constituant un premier élément de dissuasion contre le vol. Les connecteurs 35 comportent de préférence des moyens empêchant leur déconnexion par une simple tracton, soit par un système à baïonnette, soit par un système à vis ou encliquetage; la résistance mécanique offerte par chaque connecteur 35 est de préférence coordonnée avec la résistance mécanique offerte par le câble 30 telle que mentionnée. En variante, il est aussi possible de s'affranchir des connecteurs 35, chaque câble 30 étant relié au bus 34 par des moyens non déconnectables.FIG. 1 shows a portion of an object to be protected 1, in particular comprising a portion of planar wall 10, on which is installed a security device 2 connected to a security installation shown diagrammatically at 3 by means of connection means 30, 34 and 35. The object to be protected 1 can be any, the main being that it has a flat wall portion 10 of a few cm² which can receive the safety device 2. This is mainly composed of a first portion 20 comprising an electronic component 2 coded and a second portion 21 for activating and reading the code. The electronic component 22, preferably an integrated circuit, further comprises two terminals connected together by means of a thin wire forming a coil 23. For clarity of the figure, the coil 23 has only been shown with a single turn, but it is understood that it can include a large number of turns. Component 22 and part of the coil 23 are housed in an encapsulation 24, preferably made of synthetic material. The encapsulation 24 is shown here as if it were transparent in order to show the elements it contains. The face of the encapsulation 24 facing the object to be protected 1 is covered with an adhesive layer 25, at least a portion of the length of the fine wire constituting the coil 23 being included in this adhesive layer. The second portion 21 for activating and reading the code comprises another coil 26, which is also included in an encapsulation 27 similar to the previous one. The two portions 20 and 21 of the safety device also comprise, on their adjacent faces, a detachable connecting device 28, consisting for example of an adhesive tape on its two sides or of two portions of a strip of VELCRO type (brand deposited), thus making it possible to connect or separate the portions 20 and 21 of the device. The portion 21 of the security device 2, respectively the coil 26 is connected by a two-wire electric cable 30 to a central unit 31 of the security installation 3. As can be seen in the figure, the central unit 31 comprises display means , for example a screen 32 as well as data input means, shown diagrammatically by the keyboard 33. One or more data transmission buses 34 are connected to the central unit 31 of the connectors being arranged on said bus, to which connection cables 30 can be connected. Preferably the cable 30 will be provided with a sheath having a relatively high mechanical resistance or else will also comprise a mechanically resistant element, such as for example a steel cable, in order to offer a mechanical tensile strength constituting a first element of deterrent against theft. The connectors 35 preferably comprise means preventing their disconnection by a simple tractor, either by a bayonet system, or by a screw or snap system; the mechanical resistance offered by each connector 35 is preferably coordinated with the mechanical resistance offered by the cable 30 as mentioned. Alternatively, it is also possible to dispense with the connectors 35, each cable 30 being connected to the bus 34 by means that cannot be disconnected.

Un code alphanumérique électronique déterminé a été introduit dans le composant 22 lors de sa fabrication ou alors lors de l'installation du dispositif 2 sur l'objet 1, suite de quoi ce code est verrouillé, c'est-à-dire qu'il ne peut être altéré ou modifié. Le composant électronique 22 répond à son code lorsqu'il est activé par un signal HF en provenance de la bobine 26; ce code est alors lu par la bobine 26, la transmission s'effectuant par couplage inductif entre les bobines 23 et 26 faisant office d'antennes, puis est transmis à la centrale 31 où il est vérifié. Le composant électronique 22 ne comporte donc aucun moyen propre d'alimentation en énergie, étant seulement activé par le signal HF d'interrogation en provenance de la bobine 26.A determined electronic alphanumeric code was introduced into the component 22 during its manufacture or else during the installation of the device 2 on the object 1, after which this code is locked, that is to say that it cannot be altered or modified. The electronic component 22 responds to its code when it is activated by an HF signal from the coil 26; this code is then read by the coil 26, the transmission being effected by inductive coupling between the coils 23 and 26 acting as antennas, then is transmitted to the central unit 31 where it is checked. The electronic component 22 therefore does not have any specific power supply means, being only activated by the HF interrogation signal from the coil 26.

La mise en place et l'utilisation du système peuvent être décrits comme suit: la centrale 31 est disposée en un endroit du magasin facilement surveillé en permanence, par exemple à proximité de la caisse du magasin et un câblage très simple est aménagé à travers les rayonnages puisque constitué d'un ou plusieurs câbles ou bus 34, avec un seul bus 34 pour un rayonnage ou une pluralité de rayonnages, une pluralité de connecteurs 35, un pour chaque objet à protéger, étant installés sur chaque bus et régulièrement disposés sur les rayonnages. L'installation peut être très discrète puisque en fait un seul câble, un bus 34, passe le long du rayonnage.The installation and use of the system can be described as follows: the central unit 31 is arranged in a place in the store that is easily monitored at all times, for example near the store cash register, and very simple wiring is provided through the shelving since it consists of one or more cables or buses 34, with a single bus 34 for shelving or a plurality of shelving, a plurality of connectors 35, one for each object to be protected, being installed on each bus and regularly arranged on the shelving. The installation can be very discreet since in fact a single cable, a bus 34, passes along the shelving.

Sur chaque objet à protéger 1, on appose la première portion 20 d'un dispositif de sécurité, à laquelle on applique la deuxième portion 21 au moyen du dispositif de fixation 28. Dans le cas où le code a été inscrit dans le composant 22 lors de sa fabrication, il est alors introduit dans la centrale 31, soit par le clavier 33, soit par une lecture automatique; dans le cas où le code peut être choisi lors de l'installation, il est choisi maintenant et est introduit par les mêmes moyens aussi bien dans le composant 22 que dans la centrale 31. En activant le cycle de surveillance, la centrale 31 interroge séquentiellement chaque dispositif de sécurité 2 pour lire le code inscrit dans le composant 22 correspondant et signale, sur l'écran 32 et/ou par un dispositif acoustique ou lumineux auxiliaire 36 le cas où un code ne peut être lu correctement. Ce cas est provoqué lorsque quelqu'un a tenté de dérober l'objet, soit par déconnexion du connecteur 35 ou coupure du câble 30, le signal n'est alors plus transmis, soit en ayant détaché la portion 21 de la portion 20, le code n'est plus lu par l'antenne 26, soit en ayant essayé de décoller la portion 20 de l'objet 1, ce qui a interrompu la portion de fil du bobinage 23 disposée dans la couche adhésive 25 et par conséquent interrompu la transmission du code.On each object to be protected 1, the first portion 20 of a safety device is affixed, to which the second portion 21 is applied by means of the fixing device 28. In the case where the code has been entered in the component 22 during from its manufacture, it is then introduced into the central unit 31, either by the keyboard 33, or by an automatic reading; in the case where the code can be chosen during installation, it is now chosen and is introduced by the same means both in the component 22 and in the central unit 31. By activating the monitoring cycle, the central unit 31 interrogates sequentially each security device 2 for reading the code written in the corresponding component 22 and signals, on the screen 32 and / or by an auxiliary acoustic or light device 36, the case where a code cannot be read correctly. This case is caused when someone tried to steal the object, either by disconnecting the connector 35 or cutting the cable 30, the signal is then no longer transmitted, or by having detached the portion 21 from the portion 20, the code is no longer read by the antenna 26, either by having tried to take off the portion 20 of the object 1, which interrupted the portion of the wire of the winding 23 disposed in the adhesive layer 25 and consequently interrupted the transmission code.

Ainsi, chaque objet 1 à surveiller, est muni d'un dispositif 2, qui est séquentiellement interrogé par la centrale 31 afin de contrôler son propre code et de détecter un éventuel endommagement dudit dispositif de sécurité, respectivement une tentative de vol. Vu que chaque dispositif 2 répond à son propre code, la centrale 31 indique quel est l'objet ne répondant plus à son code, ce qui facilite l'intervention du personnel du magasin.Thus, each object 1 to be monitored is provided with a device 2, which is sequentially interrogated by the central unit 31 in order to control its own code and to detect any damage to said security device, respectively an attempted theft. Since each device 2 responds to its own code, the central unit 31 indicates which object is no longer responding to its code, which facilitates the intervention of store staff.

Lorsque l'objet 1 est vendu, le vendeur désactive le code en question par l'intermédiaire du clavier 33 et peut détacher les deux portions du dispositif 2 sans qu'une alarme ne soit signalée. Dans le cas d'un objet important, par exemple un poste TV, la portion 20 peut rester attachée à l'objet pour autant qu'elle ait été disposée sur une face non visible par exemple la face arrière ou la face de dessous de l'appareil. Dans le cas d'un plus petit objet, par exemple un appareil de photographie, il est nécessaire de détacher la portion 20, par des moyens appropriés à disposition du vendeur.When the object 1 is sold, the seller deactivates the code in question via the keyboard 33 and can detach the two portions of the device 2 without an alarm being signaled. In the case of an important object, for example a TV set, the portion 20 can remain attached to the object provided that it has been arranged on a non-visible face, for example the rear face or the bottom face of the 'apparatus. In the case of a smaller object, for example a camera, it is necessary to detach the portion 20, by suitable means available to the seller.

Vu que chaque composant 22 de la portion 20 répond à un code particulier, il est aussi possible d'utiliser ce code ultérieurement pour une reconnaissance de l'objet en question, ce code pouvant alors correspondre par exemple au numéro de série de l'objet en question, numéro qui est généralement gravé en un endroit approprié de l'objet. L'avantage d'une reconnaissance par code électronique plutôt que par numéro gravé réside dans l'inviolabilité du code alors que la gravure peut être effacée. Dans ce cas, on procède plutôt comme représenté à la figure 2 où la portion 20 est directement incluse dans l'objet 1 lors de la fabrication de ce dernier. Il suffit alors, pour l'exposition en magasin, de coller une portion de bande de fixation 28 à proximité de la portion 20 par un adhésif 25, et d'y fixer une deuxième portion 21 semblable à celle décrite plus haut. L'effet de protection est le même que celui décrit précédemment avec en plus l'avantage que le code contenu dans le circuit 22 pourra être lu ultérieurement, lorsque l'appareil 1 aura été acheté, au moyen d'un émetteur-détecteur adéquat afin de vérifier le numéro de série de l'appareil. Cette lecture ultérieure permet le contrôle de l'appareil pour sa maintenance ou alors permet une vérification en cas de vol. Dans le cas d'une telle utilisation, il est préférable que le code soit introduit dans le composant 22 en usine.Since each component 22 of the portion 20 responds to a particular code, it is also possible to use this code later for recognition of the object in question, this code then being able to correspond for example to the serial number of the object in question, number which is generally engraved in an appropriate place of the object. The advantage of recognition by electronic code rather than by engraved number lies in the inviolability of the code while the engraving can be erased. In this case, the procedure is rather as shown in Figure 2 where the portion 20 is directly included in the object 1 during the manufacture of the latter. It suffices then, for the exposure in store, to stick a portion of fixing band 28 near the portion 20 by an adhesive 25, and to fix there a second portion 21 similar to that described above. The protective effect is the same as that described above with the additional advantage that the code contained in the circuit 22 can be read later, when the device 1 has been purchased, by means of a suitable transmitter-detector in order to to verify the serial number of the device. This subsequent reading allows the device to be checked for maintenance or else allows verification in the event of theft. In the case of such use, it is preferable that the code is introduced into component 22 at the factory.

La figure 3 montre une forme d'exécution plus simple d'un dispositif de sécurité 2, composé uniquement d'une portion 20 comportant un composant électronique 22 répondant à un code, ce composant ne pouvant transmettre son code que lorsqu'une liaison électrique en fil fin 23 relie deux de ses bornes. Dans ce cas, le composant 22 est directement interrogé via le câble 30. Comme précédemment, une tentative de détacher le dispositif 2 de l'objet 1 aura pour conséquence d'interrompre la procédure de lecture du code et par conséquent de signaler une alarme.FIG. 3 shows a simpler embodiment of a security device 2, composed only of a portion 20 comprising an electronic component 22 responding to a code, this component being able to transmit its code only when an electrical connection in fine wire 23 connects two of its terminals. In this case, the component 22 is directly interrogated via the cable 30. As previously, an attempt to detach the device 2 from the object 1 will have the consequence of interrupting the procedure for reading the code and consequently of signaling an alarm.

Une forme d'exécution dérivée de la précédente est représentée à la figure 4, où le câble 30 est ici constitué d'une bande étroite et souple en matériau synthétique 37 (PCB), sur laquelle les deux liaisons électriques sont réalisées par des pistes métallisées 38. Le composant 22 contenant le code est relié aux pistes métallisées 38 au moyen de deux connexions en fil fin 29 noyées dans la masse d'adhésif 25. Le dispositif 2 est recouvert d'un encapsulage 24 en matériau synthétique. Une tentative d'arracher le dispositif 2 de l'objet 1 ou de couper le câble 30 aura aussi pour effet d'interrompre la lecture du code et de signaler une alarme.An embodiment derived from the previous one is shown in Figure 4, where the cable 30 here consists of a narrow and flexible strip of synthetic material 37 (PCB), on which the two electrical connections are made by metallized tracks 38. The component 22 containing the code is connected to the metallized tracks 38 by means of two fine wire connections 29 embedded in the mass of adhesive 25. The device 2 is covered with an encapsulation 24 made of synthetic material. An attempt to tear off the device 2 from the object 1 or to cut the cable 30 will also have the effect of interrupting the reading of the code and of signaling an alarm.

Le système complet de surveillance contre le vol est relativement peu onéreux puisque, comme on l'a déjà vu précédemment, le câblage dans les rayonnages est très simple; d'autre part, dans le cas de la forme d'exécution correspondant à la figure 1, le câble 30 ainsi que la portion 21 du dispositif restent généralement attachés au rayonnage, et il suffit d'avoir en stock un série de portions 20 qui seront fixées aux objets à protéger. Ces portions 20 qui peuvent être considérées comme des éléments consommables ne renchérissent pas excessivement le coût d'utilisation du système vu le faible coût de revient des composants codés 22. Dans le cas de la forme d'exécution de la figure 2 le coût d'utilisation est encore moins onéreux puisque le seul élément consommable est une moitié du dispositif de fixation 28, le coût de la portion 20 pouvant être inclus dans celui de l'objet 1 puisqu'il peut servir ultérieurement à son identification. Dans les cas de forme d'exécutions correspondant aux figures 3 et 4, le matériel consommable est légèrement plus coûteux puisque la portion 20 ainsi qu'au moins une partie du câble 30 sont consommables, bien que pouvant éventuellement être régénérés.The complete anti-theft surveillance system is relatively inexpensive since, as already seen previously, the wiring in the shelving is very simple; on the other hand, in the case of the embodiment corresponding to Figure 1, the cable 30 and the portion 21 of the device generally remain attached to the shelving, and it suffices to have in stock a series portions 20 which will be fixed to the objects to be protected. These portions 20 which can be considered as consumable elements do not excessively increase the cost of using the system given the low cost price of the coded components 22. In the case of the embodiment of FIG. 2, the cost of use is even less expensive since the only consumable element is one half of the fixing device 28, the cost of the portion 20 can be included in that of the object 1 since it can be used later for its identification. In the case of form of executions corresponding to FIGS. 3 and 4, the consumable material is slightly more expensive since the portion 20 as well as at least part of the cable 30 are consumable, although possibly being regenerated.

Différentes formes d'exécution du dispositif de sécurité 2 ont été décrites étant bien entendu que d'autres variantes peuvent être envisagées ayant les mêmes effets ou fonctions que ce qui a été décrit plus haut. De plus, la liaison entre les dispositifs 2 et la centrale de surveillance 31 a été décrite passant par le bus 34, mais d'autres moyens de liaison sont aussi envisageables, en particulier quelques dispositifs de sécurité 2 peuvent être reliés à un dispositif émetteur-récepteur par ondes hertziennes, rayonnement infra-rouge ou autre rayonnement électro-magnétique à la centrale de surveillance, éventuellement sans passer par le bus 34.Different embodiments of the safety device 2 have been described, it being understood that other variants can be envisaged having the same effects or functions as what has been described above. In addition, the connection between the devices 2 and the central monitoring station 31 has been described passing through the bus 34, but other connection means are also possible, in particular some safety devices 2 can be connected to a transmitter device. receiver by radio waves, infrared radiation or other electromagnetic radiation at the monitoring station, possibly without going through bus 34.

L'utilisation d'un tel dispositif de sécurité a été décrite appliquée à la surveillance d'objets dans un magasin; il est évident que d'autres utilisations peuvent être envisagées, par exemple la surveillance d'oeuvres d'art ou d'objets de valeur dans un musée ou plus généralement dans tout lieu d'exposition de même que la surveillance d'appareils, par exemple des ordinateurs, dans un bureau.The use of such a security device has been described applied to the surveillance of objects in a store; it is obvious that other uses can be envisaged, for example the surveillance of works of art or valuables in a museum or more generally in any exhibition space as well as the surveillance of devices, for example example of computers, in an office.

Claims (9)

Dispositif électronique de sécurité (2) contre le vol d'un objet (1), destiné à être fixé contre ledit objet et comportant des moyens de liaison (30,34,35) vers une centrale de surveillance (31), caractérisé en ce qu'il comprend un composant électronique (22) comportant un code électronique, et des moyens de sécurité (23,25,28;29) interrompant la transmission dudit code vers ladite centrale de surveillance (31) lors d'une tentative de vol dudit objet.Electronic security device (2) against the theft of an object (1), intended to be fixed against said object and comprising connecting means (30,34,35) to a central monitoring station (31), characterized in that that it comprises an electronic component (22) comprising an electronic code, and security means (23,25,28; 29) interrupting the transmission of said code to said central monitoring station (31) during an attempt to steal said object. Dispositif selon la revendication 1, caractérisé en ce qu'il comprend une première portion (20) comportant ledit composant électronique (22) et une première bobine (23) composée d'au moins une spire de fil fin, dont les deux extrémités sont reliées audit composant, et une deuxième portion (21) comportant une deuxième bobine (26) composée d'au moins une spire de fil fin, dont les deux extrémités sont reliées auxdits moyens de liaison (30) vers la centrale de surveillance (31), ladite première portion (20) étant fixée sur ledit objet (1), ladite deuxième portion (21) étant fixée à ladite première portion par des moyens de fixation détachables (28), de manière à assurer une liaison inductive entre ladite première bobine (23) et ladite deuxième bobine (26).Device according to claim 1, characterized in that it comprises a first portion (20) comprising said electronic component (22) and a first coil (23) composed of at least one turn of fine wire, the two ends of which are connected to said component, and a second portion (21) comprising a second coil (26) composed of at least one turn of fine wire, the two ends of which are connected to said connecting means (30) towards the monitoring center (31), said first portion (20) being fixed on said object (1), said second portion (21) being fixed to said first portion by detachable fixing means (28), so as to ensure an inductive connection between said first coil (23 ) and said second coil (26). Dispositif selon la revendication 2, caractérisé en ce que la première portion (20) est fixée sur l'objet (1) par des moyens adhésifs (25), une portion de fil d'au moins une spire de ladite première bobine (23) étant incluse dans lesdits moyens adhésifs.Device according to claim 2, characterized in that the first portion (20) is fixed to the object (1) by adhesive means (25), a portion of wire of at least one turn of said first coil (23) being included in said adhesive means. Dispositif selon la revendication 2, caractérisé en ce que la première portion (20) est fixée à l'intérieur d'une partie de paroi (10) de l'objet (1), lesdits moyens de fixation détachables (28) étant fixés à l'extérieur de ladite portion de paroi.Device according to claim 2, characterized in that the first portion (20) is fixed inside a wall part (10) of the object (1), said detachable fixing means (28) being fixed to the exterior of said wall portion. Dispositif selon la revendication 4, caractérisé en ce que ladite première portion (20) est fixée à demeure à l'intérieur de l'objet (1) et sert ultérieurement de moyen d'identification de l'objet par lecture du code électronique inclus dans le composant électronique (22).Device according to claim 4, characterized in that said first portion (20) is permanently fixed inside the object (1) and subsequently serves as a means of identifying the object by reading the electronic code included in the electronic component (22). Dispositif selon la revendication 1, caractérisé en ce qu'il comprend une seule portion (20), fixée sur l'objet (1) par des moyens adhésifs (25), et comportant ledit composant électronique (22) et une bobine (23) composée d'au moins une spire de fil fin, dont les deux extrémités sont reliées audit composant (22), une portion de fil d'au moins une spire de ladite bobine étant incluse dans lesdits moyens adhésifs (25), ledit composant étant relié d'autre part auxdits moyens de liaison (30) vers la centrale de surveillance (31).Device according to claim 1, characterized in that it comprises a single portion (20), fixed to the object (1) by adhesive means (25), and comprising said electronic component (22) and a coil (23) composed of at least one turn of fine wire, the two ends of which are connected to said component (22), a portion of wire of at least one turn of said coil being included in said adhesive means (25), said component being connected on the other hand to said connecting means (30) to the monitoring center (31). Dispositif selon la revendication 1, caractérisé en ce qu'il comprend une seule portion (20), fixée sur l'objet (1) par des moyens adhésifs (25), et comportant ledit composant électronique (22) qui est relié auxdits moyens de liaison (30) vers la centrale de surveillance (31) par l'intermédiaire d'au moins une portion de fil fin (29) incluse dans lesdits moyens adhésifs (25).Device according to claim 1, characterized in that it comprises a single portion (20), fixed to the object (1) by adhesive means (25), and comprising said electronic component (22) which is connected to said means of connection (30) to the central monitoring station (31) by means of at least one portion of fine wire (29) included in said adhesive means (25). Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'une ouverture desdits moyens de fixation détachable (28) ou une séparation desdits moyens adhésifs (25) ou une coupure desdits moyens de liaison (30,35) vers la centrale de surveillance (31) interrompent la lecture du code électronique inclus dans le composant électronique (22), ladite centrale (31) étant alors apte à indiquer une alarme (32,36).Device according to one of the preceding claims, characterized in that an opening of said detachable fixing means (28) or a separation of said adhesive means (25) or a cut-off of said connecting means (30,35) towards the monitoring center (31) interrupt the reading of the electronic code included in the electronic component (22), said central unit (31) then being able to indicate an alarm (32,36). Utilisation d'un dispositif selon l'une des revendications précédentes, pour la surveillance contre le vol d'une pluralité d'objets (1) exposés dans un lieu de vente, d'exposition ou dans un bureau.Use of a device according to one of the preceding claims, for monitoring against theft a plurality of objects (1) displayed in a place of sale, exhibition or in an office.
EP94810341A 1994-06-08 1994-06-08 Anti-theft electronic security device Withdrawn EP0686950A1 (en)

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WO2008136308A1 (en) * 2007-04-27 2008-11-13 Nec Corporation Feed device

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Publication number Priority date Publication date Assignee Title
FR2405526A1 (en) * 1977-10-07 1979-05-04 Etelac Displayed articles antitheft device - uses flexible adhesive strip enclosing open-loop printed circuit connect to alarm system by cable
GB2131213A (en) * 1982-12-02 1984-06-13 Alert Products Limited Alarm apparatus
EP0337283A2 (en) * 1988-04-13 1989-10-18 TELEFUNKEN electronic GmbH Goods marking device
EP0377257A1 (en) * 1988-12-27 1990-07-11 N.V. Nederlandsche Apparatenfabriek NEDAP Identification system
WO1993012513A1 (en) * 1991-12-19 1993-06-24 Ake Gustafson Security sealing device
WO1993018493A1 (en) * 1992-03-03 1993-09-16 N.V. Nederlandsche Apparatenfabriek Nedap Method of making a radio-frequency detection label with a minimum number of electronic components

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2405526A1 (en) * 1977-10-07 1979-05-04 Etelac Displayed articles antitheft device - uses flexible adhesive strip enclosing open-loop printed circuit connect to alarm system by cable
GB2131213A (en) * 1982-12-02 1984-06-13 Alert Products Limited Alarm apparatus
EP0337283A2 (en) * 1988-04-13 1989-10-18 TELEFUNKEN electronic GmbH Goods marking device
EP0377257A1 (en) * 1988-12-27 1990-07-11 N.V. Nederlandsche Apparatenfabriek NEDAP Identification system
WO1993012513A1 (en) * 1991-12-19 1993-06-24 Ake Gustafson Security sealing device
WO1993018493A1 (en) * 1992-03-03 1993-09-16 N.V. Nederlandsche Apparatenfabriek Nedap Method of making a radio-frequency detection label with a minimum number of electronic components

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008136308A1 (en) * 2007-04-27 2008-11-13 Nec Corporation Feed device
US8130157B2 (en) 2007-04-27 2012-03-06 Nec Corporation Feed device

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