EP1369825A2 - Lock cylinder with wireless signal transmission - Google Patents

Abstract

The lock cylinder has locking noses (13) operated for releasing the lock upon decoding an authorization signal transmitted between a transmitter and receiver upon insertion of a key or a chip card. A reception antenna (14,15) on each opposite side (11,12) of the lock cylinder is coupled to a common electronic evaluation unit (20) via a change-over switch (17), operated in dependence on the side of the lock cylinder at which the key or the chip card is inserted.

Description

The invention relates to a lock cylinder with contactless transmission of an authorization signal, the provided with two opposite lock cores, each by a key or each by a knob or a knob or a key are actuated to the Locking lug for unlocking a lock, and with an electronic decoding device cooperates, which at least one receiver and / or Transmitter for wireless transmission of a coded Authorization signal and an evaluation unit for Decode the authorization signal to only at Authorization to allow the unlocking of the lock which receiver interacts with antennas, the one Authorization signal from the key or a code card receive.

Such electromechanically operating lock cylinders are well known. The advantage here is that in addition to a mechanically fitting key also coded authorization signal for opening the lock must be transferred. This will be an unauthorized Access considerably more difficult. Also exists the Possibility to lock the lock cylinder in one Access control system to integrate, since the received Signals directly to a central computer of the Access control system can be passed.

A lock cylinder, on both sides with a Turn knob is provided, EP 0 999 328 A1 describes. A lock cylinder, on one side by a Turn knob and on the other side by a key is operable, is described in DE 199 30 054 A1. Here is the arrangement made so that the knob always rotatably connected to the locking lug. On the Side, which is actuated by the key, points that Housing of the lock cylinder on an antenna that with a corresponding antenna in the key interacts. A wireless transmission of the Authorization signal is possible hereby. DE 195 17 728 A1 discloses an electromechanically operating Lock cylinder, on both sides by a Reversible key is actuated. Here is the arrangement that two ferrite antennas are present, the in each case the outside and the inside of the door assigned. The antennas are in the cylinder bag in the Near the lock core arranged to one as possible small distance between the antenna and the antenna of the reached key.

From DE 201 02 853 U1 a lock cylinder is known, on one side by a key and on the other side by a rotary knob is actuated. On Both faces have an antenna. The one Antenna always acts with an antenna in the Rotary knob for wireless transmission of a signal together. From WO 99/29542 A2 an arrangement of several parallel antennas known, the one uniform transmission of signals around a vehicle around and in the Innraum effect. It is a switcher provided to the antenna groups in the interior or in the Outdoor space to switch. Also, the antennas receive a signal simultaneously. This works but reliable only with a single transmitter in the Range of antennas.

The decoding devices are often called Transponder systems are formed, one of which is passive Transponder is arranged in the key while the Transponder reading device including the antenna, the evaluation unit and the power supply in or on Lock cylinder housing or are arranged in the rotary knob. This basic arrangement has the advantage that on Key itself no separate power supply is required. When switching on the Decoding device is the antenna of the Transponder reading device activated such that this the antenna of the passive transponder on the key or on a code card stimulates, so that the stored transponder signal with the Authorization signal can be transmitted. If that Authorization signal has the appropriate access code, is the electromechanical lock by the Evaluation unit released.

In the arrangement of two antennas, it is therefore required when operating the decoding device to activate both antennas. But this is one causes relatively high energy consumption. This is included battery-powered electromechanical lock cylinders but not desired. There is also a disadvantage that with two activated antennas the transmitted Transponder signal with the authorization signal from the Evaluation unit not always reliably evaluated can be. In particular, that is the case when on the a page, for example, a matching key is plugged in, but not actuated while on the introduced a key on the other side of the lock will be to open the door. There is an overlay the signals that lead to erroneous evaluations.

Of course it would be possible to have two To provide evaluation units, each for the Receive and evaluate transponder signal and then to a microprocessor to release the Pass on castle. However, this requires one increased circuit complexity, which in the low existing installation space in the lock cylinder not always to be realized. It will also be necessary when operating the decoding device both To activate evaluation units, whereby the Energy consumption is also increasing.

The invention is based on the object, a Lock cylinder of the type described above so train that secure data transmission at a low energy consumption is possible.

The object is achieved according to the invention in that on each of the two opposite sides of the Locking cylinder in each case an antenna is present, the connected via a switch with the evaluation are due to the introduced key or the operated and / or activated knob the Evaluation unit with that antenna of the Locking cylinder connects, which is arranged on the side is where the key is in the lock core introduced or on which the knob has been actuated and / or activated. The provision such a switch has on the one hand the advantage that the evaluation unit actually only with that Antenna is connected to the authorization signal Will be received. On the other hand, there is an advantage that when activating the decoding device only one Antenna needs to be stimulated, so that the Energy consumption can be kept low. The Life of a battery can thus be increased.

As the switch between antenna and the Evaluation device or the electromotive actuator is switched, is basically arbitrary. It comes in particular, that a perfect Enable signal for driving the electromotive Actuator is generated. It can be provided that each antenna. Receiver is assigned, and that the Switch between receiver and evaluation unit is switched. Alternatively, it is possible that the Receiver a signal read circuit and in particular an A / D converter whose output is connected to the Evaluation unit directly or indirectly via the Switch is connected to the evaluation unit.

It can be provided that the switch so is formed, that the evaluation unit with that Antenna of the lock cylinder is connected on the Page is arranged, in which the key last inserted or on which the rotary knob last operated and / or activated. this has the advantage that even in one, for example on the Inside stuck key, opening the door through insertion of the key on the outside possible is because the permission signal only from this last inserted key to the evaluation unit is passed on. An overlay is not too fear, so releasing the lock with Security is possible.

How the switch is designed is basically any. It may be semiconductor circuits or else bistable or monostable relays are provided. In particular, the provision of a relay is simple Means and without circuit complexity possible. Also, the Switch by two independent inputs one Be implemented microprocessor of the evaluation, the be switched according to the activated antenna.

It is useful if the switch due to Switching signals are switched by switches, by operated the key when inserted into the lock core become. Such switches are basically known. It can be provided that the switch as a microswitch are formed, the full insertion of the Key in the lock core not only the Activate decoding device, but also the required switching to the antenna to be activated cause. The switches can also as be formed contactless proximity switch. There on each side of the lock cylinder such Switch must be present, is an assignment without further possible.

If the lock cylinder has a knob, is it is expedient 'if the switch due to Switching signals from switches that switches due to a Operation and / or activation of the rotary knob operated become. Here the arrangement can be made such that the knob, for example, axially pressed to to activate the decoding device. simultaneously the relevant antenna can be excited. Also can be provided that at a slight turn of the rotary knob a switching signal is generated, due of which the decoding device and the associated Antenna activated. But here too can one Proximity switch, which approximates a person recognizes within a certain radius, appropriate be.

It can be provided that the switches directly interact with the switch. It can be useful but also if the switches over the Coordinate evaluation unit with the switch. Because the Excitation of the antenna in the lock cylinder is associated with the activation of the decoding device is this Embodiment, which is a control of the switch by the evaluation unit contains, basically possible.

Furthermore, it can be provided that the switch the Antenna with the evaluation unit for a predetermined Time connects. This predetermined time may change over time according to the decoding device an activation remains in operation and then turns off to minimize energy consumption. To a failed closing process must be the closing process be repeated after this time. In particular, together with the measure that the antenna with the evaluation unit is connected to the side of the lock cylinder acts, in which the key was last introduced is an accidental or intentional blockage of the castle by one on the other side key is prevented.

It is expedient if the evaluation unit, the Switch and the antennas in the lock cylinder housing are integrated. This will be a lock cylinder created that easily into conventional locks can be used. Complementary measures and in particular the laying of antennas and the like are not required.

It is useful if the antennas are in the range of Lock core or in the forehead of the Lock cylinder housing are arranged. This will a small distance to the antennas in the key achieved, so the energy needed to stimulate the Antenna of the transponder reading device is required, can be kept low.

In a lock cylinder with knob is expedient if the antennas are arranged in the rotary knob are. This also ensures that no additional antennas in the surrounding door area be required. The for transferring it Authorization signal commonly used code card or Chipanhänger can be held here in front of the knob then unlock the lock can be operated.

According to a preferred embodiment of the invention provided that the switch in front of the A / D converter the Evaluation unit is switched. The evaluation device usually includes a microprocessor, a Signaling circuit, and the antenna. Of the Signaling circuit converts this from the antenna received analog authorization signal in a digital Form around, which is evaluated by microprocessor and with the Access code can be compared. The microprocessor also controls the unlocking and / or Operation of the lock required electronic Components. If the switch now before the A / D converter the evaluation unit, ie before the signal read circuit switched, there is an advantage in that only one such needs to be present. It takes place in particular a clean separation of the analog signals. If the switch is connected behind the A / D converter if it were necessary for such a separation, to provide two signal circuits. This would increase the installation space.

It can be provided that the key and the Lock core are designed as a reversible key system. This has the advantage that such key systems for the mechanical locking only the cylindrical one Need recordings of the lock cylinder housing. in the Locking cylinder sack that extends below these shots Therefore, there is sufficient space available to the to record electronic components.

Fig. 1

einen Aufbau eines Schließzylinders gemäß der Erfindung und

Fig. 2

einen Aufbau eines Schließzylinders gemäß einer anderen Ausführungsform der Erfindung.

The invention will be explained in more detail below with reference to the schematic drawing. Show it:

Fig. 1

a structure of a lock cylinder according to the invention and

Fig. 2

a structure of a lock cylinder according to another embodiment of the invention.

The lock cylinder shown in FIG. 1 has its opposite sides 11, 12 each one hollow cylindrical receptacle for a lock core, the is rotatable by a key in the receptacle. Of the Key includes mechanical protrusions and Wells in the usual way with mechanical Tumblers cooperate in the lock core, so only in agreement, a rotation of the lock core possible is. The key can be used as a conventional flat key or be designed as a reversible key. Of the Locking core is only schematically shown with one Locking nose 13 connected to the matching key to Unlocking a lock, not shown twisted can be. In this respect, the lock cylinder corresponds a conventional lock cylinder and requires none further explanation.

In addition to this mechanical coding, the shown Lock cylinder an electronic decoder with evaluation device 20, which is a transponder system includes. There are in the lock cylinder antennas 14, 15th present, which is an authorization signal from an antenna received, which at a key, not shown is available. The antenna in the key can For example, include a passive transponder, the from the respective antennas 14, 15 in the shooting cylinder for transmitting the transponder signal with the Authorization signal is excited.

The locking cylinder shown is from both sides with an electronically encoded key, and on the opposite sides 11, 12 is respectively an antenna 14, 15 is arranged. These antennas are located in a preferred manner in the forehead of the Lock cylinder housing 16, leaving a short Data link to the imported key is effected. The antennas 14, 15 are above a Switch 17 in conjunction with a receiver with Signaling circuit 18, which receives the received signals preferably converted into a digital form and a Microprocessor 19 of the evaluation 20 passes.

The receiver 18 can also be used as a transceiver be trained, for example, a passive Transponder of a key or another mobile Encourage code carrier. Also, the Signaling circuit of the receiver in the Be integrated evaluation unit.

In the evaluation device, the received signals evaluated and compared with the authorization code to to cause an unlocking of the castle. For this not shown in detail electronic control means 21st provided by the microprocessor 19 be controlled, for example, when appropriate mechanical and with suitable electronic key a rotation of the lock core in the respective recording to allow. The switched by the control means 21 and schematically illustrated motor 22 would then a Drive locking element. It can also be provided be that with appropriate mechanical and suitable electronic key a power connection between the lock core and the locking lug 13 is made. In this case, the engine 22 would become a coupling drive.

Basically, the lock cylinder shown is located at rest, that is, that the evaluation unit 20 not in operation and thus no or only one has minimal quiescent current consumption. Will now be Key inserted in one or the other recording, one of the switches 23 or 24 is actuated, whereby the Evaluation unit 20 is activated. The antennas 14, 15 are activated to the passive transponder in the stimulate introduced key to the Authorization signal to receive.

In detail, the arrangement is such that the microprocessor 19 detects those switching 23, 24, which has been actuated by the inserted key is. The microprocessor 19 interacts with the switch 17 together, the one antenna 14, 15 with the receiver and the signal reading circuit 18 connected on the Side are arranged, in which the key is introduced has been. In other words, this means that if the key has been introduced on page 11 and the switch 23 is actuated, the evaluation unit 20th is activated, whereupon the antenna 14 is excited and ready to receive. Accordingly, at a key introduced on page 12 Switch 24 is actuated, whereby on the one hand the Evaluation unit 20 is activated, so that the antenna 15th can stimulate the passive transponder in the key. In principle, it is also possible for the switches 23, 24 interact directly with the switch 17. This is shown in dashed lines in the drawing.

For the sake of clarity, in the drawing only the Reception of the authorization signal shown. The Excitation of a passive transponder only via one Antenna can be done accordingly.

It is thus achieved that only one antenna 14, 15 is activated for signal transmission. This has the Advantage that overlays of analog signals be avoided. This would otherwise be the case if the key is stuck on one side while one Actuation of the lock cylinder from the other side should be done. Also, the energy consumption is clear reduced, since only one antenna 14 or 15 for Stimulation of the passive transponder in the bowl stimulated needs to be.

The lock cylinder shown in Fig. 2 corresponds to essential to that of FIG. 1, and they are the same or equivalent elements with the same reference numbers Mistake. Here, each antenna 14, 15 is a receiver with Signal reading circuit 18, 18 'associated with the output of the Switch 17 are connected. The arrangement can be so be taken that the switch 17 in the Evaluation unit 20 integrated and / or by two independent inputs of the microprocessor 19 formed becomes. The switches 23, 24 interact with the microprocessor together so that the relevant input is activated becomes. Here is exploited that antenna, receiver and Signaling circuit often a structural unit form. In the drawing, these are for clarity half shown separately.

It can also be provided that only when Inserting the key or pressing the knob 5; on one side of the lock cylinder the corresponding Receiver and / or signal reading circuit 18, 18 ' to be activated. For this purpose, the signal lines 25, 25 ' to the individual receivers with signal reading circuit 18, 18 'provided. This reduces the energy requirement Especially when, for data exchange a the antennas 14, 15 for exciting a passive Transponder must be activated.

In the drawing, a lock cylinder with two through shown a key operated shooting cores. It is of course also possible that on one or but also on both sides of a knob to operate the Locking nose 13 is present. Here it is useful when the antennas 14, 15 are arranged in the rotary knob.

Claims (19)

Lock cylinder with contactless transmission of an authorization signal, which is provided with two opposite lock cores, each actuable by a key or by a rotary knob or by a knob or a key to actuate the locking lug (13) for unlocking a lock, and the cooperates with an electronic decoding device, which has at least one receiver and / or transmitter for wireless transmission of a coded authorization signal and an evaluation unit (20) for decoding the authorization signal to allow by means of an actuator only when authorized the unlocking of the lock or effect which Receiver cooperates with antennas receiving an authorization signal from the key or another mobile code transmitter, characterized in that on each of the two opposite sides (11, 12) of the lock cylinder in each case an An Tenne (14, 15) is present, which are connected via a changeover switch (17) with the evaluation unit (20), due to the inserted key or the operated and / or activated knob, the evaluation unit with that antenna (14, 15) of the lock cylinder connects, which is arranged on the side (11, 12), in which the key is inserted into the lock core or on which the rotary knob has been operated and / or activated. Lock cylinder according to claim 1, characterized in that each antenna is associated with a receiver (18, 18 '), and that the switch between the receiver and the evaluation unit is connected. Lock cylinder according to one of claims 1 or 2, characterized in that the receiver (18, 18 ') comprises a signal read circuit and in particular an A / D converter whose output with the evaluation directly or indirectly via the switch (17) with the evaluation unit (20) is connected. Lock cylinder after one of the. Claims 1 or 2, characterized in that the switch between the receivers of each antenna and a signal switching circuit, in particular an A / D converter is connected, which is in communication with the evaluation unit. Lock cylinder according to one of claims 1 to 4, characterized in that the switch is designed as a bistable or monostable relay. Lock cylinder according to one of claims 1 to 5, characterized in that the changeover switch is realized by two independent inputs of a microprocessor of the evaluation unit. Lock cylinder according to one of claims 1 to 6, characterized in that the switch (17) is designed so that it connects the evaluation unit (20) with that antenna (14, 15) of the lock cylinder, which is arranged on the side, in which the key is inserted last or on which the rotary knob has been pressed and / or activated last. Locking cylinder according to one of claims 1 to 7, characterized in that the changeover switch (17) due to switching signals of switches (23, 24) is switched, which are actuated by the key during insertion into the lock core. Lock cylinder according to one of claims 1 to 8, characterized in that the switch switches on the basis of switching signals from switches which are actuated due to actuation and / or activation of the rotary knob. Lock cylinder according to claim 8 to 9, characterized in that the switches (23, 24) interact directly with the changeover switch (17). Lock cylinder according to claim 8 to 9, characterized in that the switches (23, 24) via the evaluation unit (20) with the switch (17) cooperate. Lock cylinder according to one of claims 8 to 11, characterized in that the switch is designed as a non-contact proximity switch. Lock cylinder according to one of claims 1 to 12, characterized in that the changeover switch (17) connects the antennas (14, 15) with the evaluation unit (20) for a predetermined time. Lock cylinder according to one of claims 1 to 13, characterized in that the switch connects after activation of a switch, the corresponding antenna and / or receiver and / or signal reading unit and / or evaluation unit with the electromotive actuator and / or activated. Lock cylinder according to one of claims 1 to 14, characterized in that the evaluation unit (20), the changeover switch (17) and the antennas (1,4, 15) in the lock cylinder housing (16) are integrated. Lock cylinder according to one of claims 1 to 15, characterized in that the antennas (14, 15) in the region of the lock core or in the front region of the lock cylinder housing (16) are arranged. Lock cylinder according to one of claims 1 to 16, characterized in that the antennas are arranged in the rotary knob. Lock cylinder according to one of claims 1 to 17, characterized in that the key and the lock core are formed as a reversible key system. Lock cylinder according to one of claims 1 to 18, characterized in that the transmitter and the receiver is designed as a transponder system with passive transponder in the key or the code card.

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