DE20312231U1 - Anti theft protection system has wire loop connected to a sensor circuit that has switches that responds if it is cut to activate an alarm - Google Patents

Abstract

The anti theft alarm systems has a wire loop that passes around an object an is secured using a key. The loop [20] is coupled into a battery powered [52] circuit. Within the circuit is a relay coil [54] actuated switch [56] This operates in an AND logic function with a second switch [53] to control an acoustic alarm if the wire loop is cut or broken.

Description

BOEHMERT & BOEHMERT

Boehmcrt & Boehmert · Office Landshut ■ PO Box 26 64 · D-84010 Landshut

DR.-INQ KARLBOEHMERT ₁ PA(IWi-IWJ) DIK-.-INQ ALBERTBOEHMERT. PA(19O2.u»J) WILHELM JH STAHtBERQ RA ₁ BmM _n DR.-ING WALTER HOORMANN, pa·,»«™ DIPU PHYS. DR. HEINZ GODDAR, pa·, MonA« DR-NQ ROLANDLIESEOANQ PA'.MQnd™ WOLF-DETER KUNTZE, RA. Dnm", Al™* DIPL-PHyS-ROBERTMONZHUBER ₁ PA(IeM-IeSi) DR LUDWKi KOUKER, RA ₁ Bm _n DR (CHEM.) ANDREAS WINKLER, PA·, IW» MICHAELA HUTHJJIERIQ RA, Munich DIPL-PHYS. DR. MARION TÖNHARDT, DR. ANDREAS EBERT-WEJDENFELLER, RA. B™ DIPL-INQ EVA LIESEGANQ PA·, Meuten DR. AXEL NORDEMANN, RA, Berlin DIPL-PHYS. DR. DOROTHEE WEBER-BRULS,: DIPL-PHYS. DR . STEFAN SCHOHE, PA·, Mi-Ao, DR-INQ MATTHIAS PHHJPP ₁ pa·, Bielefeld DR. MARTIN WIRTZ, ra. ra«!d™r DR DETMAR SCHÄFER, RA, B™» DR JAN BERND NORDEMANN, LL. M., RA ₁ BeHa DR, CHRISTIAN CZYCHOWSKL RA. Berlin DR CARL-RICHARD HAARMANN, RA, MOnehe» DIPL-PHYS. CHRISTIAN W. APPELT, PA·, MSnd» DiPL-PHYS. DR--INQ UWE MANASSE, PA·. &Bgr;&pgr;&eegr; DIPL-PHYS. DR. THOMAS L BFTTNER, pa·. b* DR VOLKER SCHMTTZ, M. Juris (Oxford), RA. l DIPL-BlOL DR. JAN B. KRAUSS, PA'.Bertm

PA - Patent Attorney

RA · Rechtsanwall/Attorney al Law

• - European Palent Attorney

^&agr; - Mail to Law

⁰ - Use of law

O - Diplörw dEtudes Approfondies en Conception de Produits el

innovation

Alk zu Representation before the European Ministry of Foreign Affairs, Altem» Profetiiuml ReprwentaHon ■! the Community Training Office, Alictnte

PROF. DR. WILHELM NORDEMANN, RA, BRB"

DIPL MTfS. EDUARD BAUMANN. PA'.Hi

DR.-INQ GERALD KLÖPSCH, pa·. DOacUat

DIPL-INQ HANS W. GROENINQ pa\Müh*«

DIPL-ING SEGFRIED SCHIRMER, pa·. Bielefeld

DIPL-PHYS. LORENZ HANEWINKEL. &eegr;

DIPL-ING ANTON FREIHERR RIEDERER V. PAAR, pa·. l*

DIPL-ING DR. JAN TÖNNES, PA. RA, kid

DIPL-PHYS. CHRISTIAN BEHU PA*. K*

DR. ANKE NORDEMANN-SCHIFFEL, LAWYER. Poodm

DR. KLAUS TIM BRÖCKER, ra. Eferim

DR. ANDREAS DUSTMANN. LLM., RA-Pou*™

DIPL-INQ NILS T. F. SCHMID, PA'o.MOn*m,P»U

DR. FLORIAN SCHWAB, LLM. RA-.MOnd?

DIPL.-BIOCHEM. DR. MARKUS ENGELHARD, pa. M<*d*n

DIPL.-CHEM. DR. KARL-HEINZ METTEN. PA*. Mo&trade;*",

PASCAL DECKER, Attorney at Law

DIPL-CHEM. DR. JÖRK ZWICKER, pa-Md-a&trade; DR. CHRISTIAN MElSSNER, RA.MONdH» DIPL-PHYS. DR. MICHAEL HARTIQ &Rgr;α,&Mgr;&lgr;«*&trade;

h Cooperation with/in cooperation with DIPL-CHEM. DR. HANS ULRICH MAY, PA·. M

Ulrich Carthäuser, Oberschneiding Ingrid Edbauer, Stephansposching

Anti-theft device

The innovation relates to an anti-theft device, whether in conjunction with a lockable housing as a storage location for objects or as an anchoring option for objects to be secured, in particular with an alarm source that can be switched on and off by means of a first switch and an electrically driven sensor circuit that triggers the alarm of the alarm source and can be switched on and off by means of a second switch, which responds to a change associated with an attempted theft, optionally additionally with a fixed anchoring base matched to the device.

Freyung 615 ■ D-84028 Landshut ■ PO Box 26 64 · D-84010 Landshut ■

n "t49-871-22J70 < Fax +49-871-22143

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MUNICH - BREMEN

- BERIJN - J)UsSeCAJrF - FRANlsrtjlSr- bIeLEFEM) - POWDAM · KIEL - PADERBORN - L{iNDSHL{r - iJjHEiiKIRCHEN - AUCANTE - PARIS - SHANGHAI

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The alarm source triggered by a theft attempt can be the source of an acoustic alarm, a visual alarm and/or a radio alarm. The anti-theft device according to the innovation is particularly intended for the storage of smaller objects, for example on the beach, in the gymnasium, in schools, etc. According to a simpler version of the anti-theft device, this does not have an alarm source, but instead has an anchoring device that can only be destroyed with great effort. An anti-theft device for a movable container with an acoustic alarm is known, for example, from US-PS 2 273 440. The container has a retractable protruding sensor pin on the bottom, which is moved downwards when the container is lifted and thereby triggers the alarm. In another container with an anti-theft device and acoustic alarm, known from DE-UM 87 00 011, pressure sensors are located on the base of the container. Such anti-theft devices are, however, somewhat unsafe. The protrusion of the sensor pin can be prevented by first sliding a cardboard box or newspaper underneath it. And the pressure sensors, which respond when the surface pressure on the underside is reduced, can easily lead to false alarms, triggered by the container shaking in the wind, by people or animals bumping into it, or by the container being under-loaded.

In another context, namely in the case of an opening device for a valuables transport container, it is known from EP 1 041 233 A that, after the anti-theft device has been firmly attached, in the event of sabotage intended to remove the device, a cable is sheared internally, thereby causing a blockage which makes opening impossible.

The innovation is intended to provide simple, easy and sufficiently secure protection against "small" thefts. This is achieved, based on an anti-theft device of the type mentioned above, by the sensor circuit being a cable loop included in an electrical circuit made of a conductive cable that can be laid to lock the anti-theft device.

and further contains a third switch which can be switched by the sensor circuit, via which the alarm source is supplied with power, which is functionally connected to the first switch in an AND connection and which passes or blocks the current to the alarm source depending on a control dependent on the current in the cable loop, for example in that the sensor circuit comprises a holding element coupled to the third switch which keeps the third switch open in the current-supplied state, while its current-interrupted state results in the third switch being closed, wherein preferably the first and the second switch are the same switch which is in series with the third switch in the circuit of the alarm source; preferred possibilities for this are that the third switch is a relay switch whose relay coil is in series with the cable loop, or that the third switch is an electronic switch which can be switched or blocked by a control voltage dependent on the current in the cable loop.

The most important use of the security device is in conjunction with a container, with the first and second switches housed in a lockable housing. The cable loop can be laid around any more or less permanent installation, such as a fence post, the support of a deck chair or part of a bicycle frame, or even around the post and the bicycle frame at the same time to secure the latter as well. On the beach, for example, if a deck chair or bicycle is carried away, it will be noticed. However, if the thief thinks that he can discreetly get hold of the container by cutting the cable, he will set off the alarm, which is in the simplest case an acoustic alarm. Using a siren or an oscillator, a piercing noise can be generated with a moderate amount of energy and a voltage of, for example, around 9 V. The anti-theft device can therefore also be used just for security reasons, e.g. For example, it could be a bicycle lock without a container, which can be used to tie the bicycle to a fixed base using a cable loop, or as a security device for drilling machines, valuable tools, tool boxes or scaffolding. However, according to the preferred design, it is in

a lockable container in such a way that the device can only be released from inside the container so that it is no longer "armed ^" . The container itself can be locked with a normal lock and key, with a combination lock or with other locking devices and thus be inaccessible to the thief.

In addition, or according to a simpler embodiment exclusively, the anti-theft device can also be connected to a lockable housing and have a stationary anchoring base as an additional component such that coupling structures are formed on the anchoring base and coupling elements are present in the housing which can be coupled to the coupling structures, which protrude from the housing through an opening and can only be adjusted between a coupled and an uncoupled position inside the housing. The coupling elements are, for example, a screw or a bayonet lock and the coupling structures are a thread or the bayonet counterpart, for example in a firmly anchored pipe to which the container can be fastened or released as long as it is open. Such pipes with, for example, threaded holes arranged at a distance can then be installed in vestibules of gyms or the like.

The cable loop can be designed in various ways, for example as a separate component which, after being wound around a base, is connected and secured with its ends to the anti-theft device, for example by means of screws at the end. The fact that anyone could unscrew the screws does not matter, since this is what sets off the alarm. The cable loop can also consist of a cable strand firmly anchored in the housing at one end, which is then attached and connected with its other end to the prepared point. This prepared point can be located not only on the outside wall of the housing, but also inside the housing, where it is only accessible when the housing is open; and can be located, for example, on the winding core of a drum located in the housing, by the rotation of which the cable strand can be wound up and pulled tight around the base. Finally

The cable loop can also be attached and connected on both sides inside the container, and in this case in particular to two winding drums, whereby a point in the loop is then pulled through an opening into the housing and attached inside. The base is then double-spanned. The drum or drums can be conveniently locked in their rotating position, which can be done automatically, for example, by closing the lid, so that the tight wrapping of the base, which may be desired in some circumstances, does not loosen. The winding drums either have points of engagement for a turning tool such as a wrench, they can also be turned manually by gripping them with the hand, or they have a spring drive or an electric drive for automatically pulling in and tightening the cable.

If the base to which the container with the anti-theft device is to be anchored has an approximately cylindrical structure and is, for example, a pipe or a branch, the container can be designed in such a way that it has a groove-like structure along one of its outer surfaces, which may also have longitudinal ribs and is placed on the cylindrical base. The secured container then sits tightly against such a base in a vibration-proof manner.

Further features, advantages and developments of the innovation emerge from the following description of preferred embodiments with reference to the drawing. They show:

Fig. 1 different designs of anti-theft devices at the respective location;

Fig. 2 is a perspective view of an embodiment of an anti-theft device with container;

Fig. 3 shows a perspective view corresponding to Fig. 2, showing the bottom of the anti-theft device container of Fig. 2;

Fig. 4 is a front view of the container of Fig. 2 with the lid opened;

Fig. 5 a view corresponding to Fig. 4 with closed lid

Fig. 6 is a side view of the container of Fig. 2, with the lid shown in different positions;

Fig. 7 is a section through the container of Fig. 2 in a plane VII-VII in Fig. 5

Fig. 8 is a perspective view of components of the anti-theft device of the container of Fig. 2 in their functional position;

Fig. 9 is a plan view of the container of Fig. 2 with the lid and top wall parts removed;

Fig. 10 is a section through the container of Fig. 2 in a plane X-X in Fig. 9;

Fig. 11 is a side view of the container of Fig. 2 in a viewing direction XI in Fig. 9;

Fig. 12 is a bottom view of the container according to a modified embodiment;

Fig. 13 is a section through the container in a plane XIII-XIII in Fig. 12, attached to a pipe;

Fig. 14 a vertical section through a backpack with integrated safety device;

Fig. 15 is a circuit diagram of the anti-theft device in relay circuit;

Fig. 16 is a circuit diagram of the anti-theft device in electronic circuit.

Fig. 1 is intended to illustrate the usability of the anti-theft device according to the invention integrated into a container. It shows a plurality of such containers, namely a container la, which is anchored to a fence post with a taut cable, a container Ib, which hangs on a branch with a long, loose cable, whereby the containers la and Ib can each be opened with a key, a container Ic, which is also attached to the branch and can be opened by entering a number, and a container Id hanging on this branch, which can be opened and also gives an alarm via a radio connection. A container

Ie is anchored to a prepared tube 2, which has holes 3 in its wall thickness that are provided with a thread. A container If is a backpack that is attached using the securing device. Finally, a containerless securing device 4 is shown, with the help of which a bicycle is anchored to the fence.

Fig. 2 shows a container with an integrated anti-theft device, which corresponds in terms of technology to the container la in Fig. 1, but has a different shape. This container 1 has a housing 5 with an interior 9, long side walls 10 and short side walls 11 as well as a base 12 (Fig. 3) and a lid 13 which can be opened and closed with the aid of a hinge 14. The lid 13 can be locked in its closed position with the aid of a lock 15 and a key (not shown in Fig. 2), so that the objects contained therein cannot be removed and the control elements contained therein cannot be operated.

Components of the anti-theft device are located in the side walls 11, which have an increased thickness. This includes an extendable cable 20 in the form of a conductive metal cable, expediently insulated over its length, which in the embodiment shown in Fig. 9 is wound on a winding drum 21 in one of the side walls 11 and is electrically connected at its end and is guided outwards through a cable outlet opening 22 so that it can be pulled out. In the other of the side walls 11 it is guided through a cable outlet opening 23 and in the embodiment shown its cable strand end is fastened inside and electrically connected. According to other embodiments not shown, winding drums are arranged on both sides and/or the winding drums are spring-loaded so that they always try to wind up the cable. In the embodiment according to Figs. 2 and 3, a cable insertion slot 24 is located centrally in the container bottom 12 and next to it a hook 25, which are arranged in such a way that the cable 20, which has a length of 1.20 m, for example, looped around an anchoring base such as a branch or a pole, can be guided in one area of its path by

the slot 24 is introduced into the interior of the container, where it forms a loop that can then be placed around the hook 25. According to Fig. 2, to facilitate this hooking onto the cable, an eye hook 26 is provided that can be moved along the cable with the aid of a sleeve and can be coupled to the hook 25. In the version with two symmetrical winding drums (not shown), the eye hook 26 can also be firmly mounted in the middle of the cable.

As far as it has been described so far, the operation of the anti-theft device is as follows: The container 1 is brought to the anchoring base while still open and the cable 20 is pulled out as far as necessary and looped from both ends around the anchoring base, such as a rod (Fig. 8). The "distal" end of the cable loop, with or without the eye hook 26, is pushed through the cable insertion slot 24 from the bottom into the container interior 9 and hooked onto the hook 26, whereupon the cable 20 is tightened by rotating the winding drum 21. The container 1 can now be filled with the objects to be stored, whereupon the lid 13 is closed and locked. The container 1 is thus firmly anchored to the anchoring structure, but there is still a risk that the cable 20 will be severed in order to steal the container 1. This risk will be counteracted in a manner described in more detail later.

First, however, further details of the mechanics of the container 1 will be described, first of all the winding drum 21, specifically with reference to Fig. 10. The front drum side 30 is star-shaped, and at the end of the lid 13 that comes into the area of this drum side 30, a lid edge 31 with a complementary design is arranged, which engages in the star configuration of the drum side 30 when the lid 13 is closed. When the lid 13 is closed, the winding drum 21 is thus locked in the direction of rotation and the cable 20 cannot be pulled out and loosened. The star configuration of the drum side 30 also provides a convenient grip for manually rotating the drum when winding up the cable 20. If in the case

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If a stiffer cable requires a higher torque for winding, a hexagon can also be fitted in the axial extension of the winding core, which can be accessed using a wrench.

The container 1 has a channel structure on its underside, namely by means of a subfloor component 35 in which a channel 36 is formed which runs in the longitudinal direction of the container 1 and is approximately triangular in cross section and has a longitudinal corrugation 37. This structure facilitates the fastening of the container 1 to a substantially cylindrical anchoring base such as a branch, a pole or a pipe. The cable insertion slot 24 is located in the bottom of the channel.

Fig. 12 shows the container 1 from below. Its base component 35 has two elongated rail-like base surfaces 40 on which it rests when placed on the ground. Between the cable outlet openings 22 and 23, which are formed in one of the base surfaces 40, a cable guide channel 41 is shown, which is formed in the base component 35. The cable 20, which is sunk into the cable guide channel 41 when not in use, does not itself rest on the ground and is therefore protected against crushing and contamination. A recessed grip 42 makes it easier to pull the cable off. No cable insertion slot 24 is shown in Fig. 12; this could be arranged off-center or on a side wall of the container 1, or the container 1 of this embodiment could be one in which a mechanism (not shown) for holding and electrically connecting the inserted cable end is present on the inside of the cable outlet opening 23.

In the embodiment shown in Figs. 12 and 13, there is a bore 43 in the channel 36 centrally for inserting a wing screw 44 for using the container as a container Ie according to Fig. 1. In a simplified embodiment, this container Ie has no cable and the mechanical and electrical components connected to it, but only the bore 43 and the wing screw 44, with the help of which the container can be screwed onto and off the pipe 2 as long as the lid 13 is open, but is not accessible when the lid 13 is closed.

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Fig. 14 shows a backpack 45 in a vertical cross-section, as shown as a container If in Fig. 1. It contains a large compartment 46 for less valuable goods and a small compartment 47 for small valuables. This compartment 47 corresponds to the interior 9 of the previously described embodiments, which can be locked with the help of the lock 15 and, in addition to any valuables, contains the switches and locking means. The compartment 47 is located on the side of the backpack 45 facing the wearer's back. This side is covered by a flexible, in particular cushioning layer in the form of a back mat 48, and in this back mat 48 a groove 49 is formed, in which, when retracted, the part of the cable 20 running outside the backpack, which is shown in dashed lines in Fig. 14, is sunk. On the inside, the back mat 48 is connected to a flexible carrier plate with an electrical circuit 50, which is a component of the anti-theft device.

To prevent theft by cutting the cable 20, it is provided that the anti-theft device in this case gives an alarm with the help of the electrical or electronic circuit 50. As an alarm device, an acoustic oscillator 51 is built into one of the side walls 11 of the containers 1a, 1b, 1c and 1f and in the security device 4 (Fig. 11), which emits a siren-like noise when an alarm is triggered. Possible circuits that can be used for this purpose are shown in Figs. 15 and 16. An electric battery 52 serves as the power source, the voltage of which must be sufficient to feed the acoustic oscillator 51. The other parts of the circuit could also be operated with a lower voltage. The battery circuit runs according to Fig. 15 on the one hand via a main switch 53 that can only be operated inside the container, a relay coil 54 of a relay and the loop of the cable 20 from one connection terminal of the battery source to the other. Another circuit runs via the main switch 53 and the normally closed contact 55 of the relay switch 56 to the acoustic oscillator 51. When the circuit is switched on, i.e. when the main switch 53 is closed, the relay armature is pulled in and keeps the circuit of the acoustic oscillator 51 interrupted. During the fuse time, the relay coil 54 remains constantly energized.

If the circuit is interrupted by cutting the cable 20, the relay switch 56 jumps back to the rest contact 55 and thus supplies the acoustic oscillator 51 with power, so that it immediately sounds the alarm. When the main switch 53 is opened, the relay coil 54 is also de-energized and the relay switch 56 jumps back, but by opening the main switch 53, the oscillator 51 is no longer included in the circuit and the alarm is not triggered. However, the main switch 53 can only be opened, as can its closing to "arm" the safety device, when the lid 13 is open and thus when the container is unlocked.

In principle, it would also be possible to distribute the main switch 53 into two switches, one of which switches the relay coil 54 on or off and the other of which switches the acoustic oscillator 51 on or off.

The relay switch 56 can also be replaced by an electronic switch, which can reduce the continuous current load. Fig. 16 shows a corresponding diagram. The main switch 53 is divided into two separate switches 53a for the acoustic oscillator 51 and 53b for the cable loop. A transistor 60 serves as the switch for the oscillator 51, which is controlled by a voltage that is tapped at resistors 21 in the circuit of the cable loop.

The electronics can of course be further refined to achieve special characteristics and false alarm protection; for example, a current sensor circuit can be tuned to a certain current intensity, which in turn depends on a given resistance of the cable 20. If the thief, who knows the anti-theft device, first wants to bridge the cable by connecting an auxiliary cable at two points, between which he then cuts the cable 20, the alarm responds due to the change in the resistance of the cable loop. The cable resistances can be dimensioned for the device specifically, also by means of an inserted series resistor. Instead of the acoustic alarm by the oscillator 51, an optical alarm can also be provided, for example a flash of light, or a radio signal can be triggered.

that triggers an alarm at a remote location or triggers other reactions, such as blocking exit doors or activating a surveillance camera. Of course, several types of alarm can also be triggered simultaneously.

In the safety device 4 shown in Fig. 1, which serves as a bicycle lock, the container containing the operating elements for manually switching off the safety device and releasing the loop may also be missing. In this case, for example, the cable loop can be held or released by the bolt of a key-operated lock and the operation of the switch 53 can also be coupled to the lock.

Claims (23)

1. Anti-theft device with an alarm source ( 51 ) that can be switched on and off with the aid of a first switch ( 53 , 53a ) and an electrically driven sensor circuit that triggers the alarm of the alarm source and can be switched on and off with the aid of a second switch ( 53 , 53b ), which responds to a change associated with an attempted theft, characterized in that the sensor circuit comprises a cable loop included in an electrical circuit made of a conductive cable ( 20 ) that can be laid to lock the anti-theft device, and further contains a third switch ( 55 , 60 ) that can be switched by the sensor circuit, via which the alarm source is fed with current, which is functionally connected to the first switch in an AND connection and which lets the current through to the alarm source or blocks it depending on a control that depends on the current in the cable loop. 2. Anti-theft device according to claim 1, characterized in that the sensor circuit comprises a holding member ( 54 ) coupled to the third switch ( 55 , 60 ) which, in the current-fed state, keeps the third switch open, while its current-interrupted state results in a closed state of the third switch. 3. Anti-theft device according to claim 1 or 2, characterized in that the first and the second switch are the same switch ( 53 ) which is connected in series with the third switch ( 55 ) in the circuit of the alarm source ( 51 ). 4. Anti-theft device according to one of claims 1 to 3, characterized in that the third switch ( 55 ) is a relay switch whose relay coil ( 54 ) is in series with the cable loop ( 20 ). 5. Anti-theft device according to one of claims 1 to 3, characterized in that the third switch ( 60 ) is an electronic switch which can be switched on or off by a control voltage dependent on the current in the cable loop. 6. Anti-theft device according to one of claims 1 to 5, characterized in that the first and second switches ( 53 , 53a , 53b ) are accommodated in a lockable housing ( 5 ). 7. Anti-theft device according to claim 6, characterized in that the housing ( 5 ) is a container ( 1 a, 1 b, 1 c, 1 d, 1 e) for storing small valuables, in particular outside the home. 8. Anti-theft device according to claim 6 or 7, characterized in that the cable loop consists of a cable harness with two end terminals and the housing has two counter terminals for clamping the end terminals of the cable harness, which are connection points in the circuit. 9. Anti-theft device according to claim 6 or 7, characterized in that the cable loop ( 20 ) consists of a cable harness which on the one hand is anchored in the housing ( 5 ) and is electrically connected and led out of the housing and on the other hand has an end terminal, and that the housing has a counter terminal for clamping this end terminal of the cable harness, which is a connection point in the circuit. 10. Anti-theft device according to claim 9, characterized in that the counter-clamp of the housing is located on the winding core of a rotatable drum ( 21 ) located in the housing and lockable in the direction of rotation. 11. Anti-theft device according to claim 6 or 7, characterized in that the cable loop ( 20 ) consists of a cable harness which is connected at least at one end in the housing ( 5 ) and is removably wound onto a drum ( 21 ) and led out of the housing, and that the housing has an opening ( 24 ) for inserting a partial length of the length of the cable harness running outside the housing and a holding member ( 25 ) inside the housing for reversibly holding the inserted partial length of the cable harness. 12. Anti-theft device according to claim 11, characterized in that the drum(s) ( 21 ) can be locked at least stepwise in their rotational position. 13. Anti-theft device according to claim 10 or 12, characterized in that the housing ( 5 ) has a closable cover ( 13 ) on which locking contours ( 31 ) are formed which, when the cover is closed, engage in complementary locking contours (on 30) of the drum(s). 14. Anti-theft device according to one of claims 10 to 13, characterized in that the drum(s) ( 21 ) has/have points of engagement for a rotary tool. 15. Anti-theft device according to one of claims 10 to 14, characterized in that the drum(s) ( 21 ) has/have a cable winding spring drive. 16. Anti-theft device with a lockable housing ( 5 ) and a stationary anchoring base ( 2 ), in particular according to one of claims 1 to 15, characterized in that coupling structures ( 3 ) are formed on the anchoring base ( 2 ) and coupling members ( 44 ) which can be coupled to the coupling structures are present in the housing, which protrude from the housing through an opening ( 43 ) and can only be adjusted between a coupled and an uncoupled position in the interior of the housing. 17. Anti-theft device according to claim 16, characterized in that the coupling structures ( 3 ) are a thread and the coupling members are a screw ( 44 ) with a head, in particular a wing head, located in the housing ( 5 ). 18. Anti-theft device according to claim 16, characterized in that the coupling structures and coupling members form a bayonet closure. 19. Anti-theft device according to one of claims 16 to 18, characterized in that the anchoring base is a stationary mounted tube ( 2 ) in which the coupling structures are formed in radial bores ( 3 ). 20. Anti-theft device according to one of claims 6 to 19, characterized in that the housing ( 5 ) has a groove-shaped structure ( 36 ) along one of its outer surfaces. 21. Anti-theft device according to claim 20, characterized in that the channel formed by the channel-shaped structure ( 36 ) has a longitudinal corrugation ( 37 ). 22. Anti-theft device according to one of claims 1 to 5, characterized in that the first and second switches ( 53 , 53a , 53b ) can be switched by a key operation. 23. Anti-theft device according to claim 22, characterized in that the cable loop ( 20 ) consists of a cable harness which is electrically and mechanically connected at least at one end to a terminal of the sensor circuit by a clamp which can be released by means of a key operation.