DE4409559C2 - Key for locking system - Google Patents

Description

The invention relates to a key for a locking system according to the preamble of claim 1.

Such locking systems are used primarily in motor vehicles used and serve to lock and unlock the doors of one Motor vehicle via a central locking system. If necessary, you can also use the key of the locking system the ignition lock of the motor vehicle are operated.

DE 34 36 761 A1 describes an electronic locking system known for a motor vehicle that from a to electronics intended for the intended operation Key and a recipient exists at the central Place is arranged in the motor vehicle. The electronic The key sends a coded operating signal to the wireless Receiver. There are decryption means in the motor vehicle of the coded operating signal is provided so that a positive evaluation of the operating signal Central locking system for locking or unlocking the car doors operated.

The known electronic key also serves as Ignition key for the ignition lock of the motor vehicle. Is the electronic key inserted into the ignition lock, so is another coded operating signal from the electronic Key can be transferred to the ignition lock. If successful  Decoding of this operating signal will start up made an operating unit of the motor vehicle.

DE 37 37 468 A1 also includes a motor vehicle a central locking system for the doors and the tailgate known. The central locking system has an electronic one Actuator, which by means of a transmitter electronic key and a recipient in Motor vehicle is remotely controllable. The central locking system acts to lock and unlock the doors and the Tailgate of the motor vehicle. An additional one mechanical locking cylinder is located in the driver's door and in the tailgate for alternative locking and unlocking using a separate mechanical key. On Indenting the additional anti-theft position for the central locking system is to avoid a hazard the user is only possible by operating the transmitter.

The disadvantage of this known key is that none in sufficient security can be achieved in practice. So are at Passing on the motor vehicle to third parties all functions the locking system can be operated with the key provided, regardless of whether the corresponding functions for the Third parties are actually necessary to operate the vehicle. In particular, for example, when visiting a workshop the trunk or the glove compartment is inspected by a third party become. The owner is therefore forced to do this beforehand Glove box and empty the trunk.

Finally, in GB 2 201 454 A Lighting unit described using Fasteners on a mechanical key is attachable. In addition to the actual function for The key holder on the lock can be illuminated  Lighting unit on the key with a signal generator be provided so that an electronic code from the key on the lock for additional security of the Locking function is transferable. The castle is in this Case can only be operated with the mechanical key if the transmitted code is OK. This key too therefore allows all locking functions of the associated locking system so that when used in a motor vehicle also the disadvantages mentioned having.

The invention is based on DE 37 37 468 A1 Task based on the key to an electronic To improve locking system so that security is increased.

This task is accomplished with a generic key the characterizing features of claim 1 solved.

Further refinements of the invention are the subject of Subclaims. So the key consists of two Partial keys for operating different functions of the locking system, which are two electronic Partial key or one electronic and one mechanical part key can act. In particular, can to operate the lock on the trunk and on Glove compartment a separate key can be provided. At the Housing of the partial keys can be connecting means,  for example hinges, locking devices, key rings o. Like., Be arranged, with the help of the partial key connectable to the entire key and also separable again are.

The advantages achieved with the invention exist in particular that all functions of the Locking system with a simply designed, entire Keys can be operated. On the other hand, this whole Keys are separated into partial keys, so that with the Partial keys only single, the corresponding one Functions assigned to subkeys can be actuated. Respective third parties then receive the partial key with the for they have certain functions, which ensures that these people only use the locking system as part of their Can use authorization. This will prevent theft and the risk of abuse significantly reduced. At a For example, the owner gives a visit to the workshop Partial key to the workshop, the car doors and that Ignition lock operated. Access to the trunk and to Glove box is then not possible for third parties.

The key can be so while maintaining security be designed so that an emergency opening at least one Car door is possible. If the power supply of the Motor vehicle off, for example because the car battery is empty the authorized user can still go to the Motor vehicle arrive.

Embodiments of the invention are in the drawings are shown and are described in more detail below. It demonstrate

Fig. 1 shows schematically a functional overview of the locking system in a motor vehicle,

Fig. 2 is a block diagram for the electronics of the lock system with an associated key,

Fig. 3 is a key as well as the two partial keys according to a first embodiment in a perspective view;

Fig. 4 shows a key as well as the two part key, in another embodiment,

Fig. 5 is a key in yet another embodiment and

Fig. 6 shows a key in yet another embodiment.

The locking system 1 shown schematically in FIG. 1 is intended for a motor vehicle 13 and has a receiver which is contained in a device 6 which is arranged, for example, in the car door 12 of the motor vehicle 13 . The electronic key 2 intended for the locking system 1 , which is shown in FIG. 1 both from the front and from the back, contains electronics 14 which are intended for use, as a result of which the key 2 with the receiver in the device 6 generates a coded operating signal 7 when the key 2 approaches the car door 12 . Electronics 19 located in the motor vehicle is connected to device 6 via lines 18 . The electronics 19 , which may be located in the car door 12 , contains means for decoding the coded operating signal 7 . If the operating signal 7 in the electronics 19 is evaluated positively, ie if it is the authorized key 2 , a control unit 20 located in the car door 12 , which is connected to the electronics 19 via lines 18 ′, is used to carry out functions of the Locking system 1 , such as locking or unlocking the car doors 12 operated. The control unit 20 can be, for example, a central locking system known per se.

The key 2 for the locking system 1 can also be used for remote-controlled actuation of the control unit 20 up to a certain maximum distance from the motor vehicle 13 . For remote control of the electronics is supplied the key 2 in the key of a 2, located, for example, formed as a battery energy storage 30 14 as shown in Fig. 1 is indicated at the bottom, visible from the back side key 2. When a key 10 is pressed on the key 2 , a coded operating signal 8 is sent unidirectionally, which may possibly be a different code from the operating signal 7 . The operating signal 8 is in turn received by the device 6 on the car door 12 or alternatively by a receiver arranged centrally in the motor vehicle, for example on the inside mirror, and evaluated in the electronics 19 . If the code is correct, the control unit 20 in turn locks or unlocks the car doors 12 .

With the electronic key 2 , an electronic ignition lock 3 can also be actuated. The ignition lock 3 is connected to an associated operating unit 5 via connecting lines 4 . The operating unit 5 can be, for example, the electronic engine control, an immobilizer of the motor vehicle or the like. By means of the key 2 inserted into a receptacle 11 of the ignition lock 3 , the operating unit 5 can be put into operation after the exchange of at least one coded operating signal 9 between the key 2 and the ignition lock 3 and its positive evaluation.

In addition to the functions already described, namely the locking and unlocking of the car doors 12 and the release of the ignition lock 3 , further functions can be actuated by means of the locking system 1 . The locking system 1 is designed such that the locking and unlocking for the glove compartment 36 and for the trunk 37 can be carried out. In a first embodiment, the locking system 1 in the glove compartment 36 and the trunk 37 each has a mechanical lock 35 .

As can be seen from the upper key 2 shown in FIG. 1 from the front, the key 2 consists of two partial keys 38 , 39 , which are each designed to actuate different functions of the locking system 1 . The first partial key 38 serves to actuate the locking and unlocking of the car doors 12 and the release of the ignition lock 3 . The second partial key 39 is designed as a mechanical key and is intended for actuating the locking and unlocking of the mechanical lock 35 on the glove compartment 36 and on the trunk 37 , which is shown in FIG. 1 by the arrows 40 .

As already mentioned, the partial key 38 of the key 2 and the part of the locking system 1 which acts for the car doors 12 and the ignition lock 3 each work with electronics 14 , 19 . The more detailed configuration of this electronics 14 , 19 is shown by way of example in a block diagram in FIG. 2, which explains the principle.

The device 6 containing the receiver has means for the inductive contactless transmission of energy to the key 2 . These means consist of an induction coil 31 , which is arranged in the device 6 containing the receiver and is fed by an energy transmission electronics 32 connected to the on-board power supply line 33 . In the key 2 , an electromagnetic transmission coil 34 is arranged, so that when the key 2 approaches the corresponding car door 12, the energy transmission 41 begins by the induction coil 31 and the electromagnetic transmission coil 34 interacting accordingly. The electronics 14 of the key 2 can be activated and operated as intended by the energy consumption according to the energy transmission 41 . The electronics 14 are then supplied with energy by the device 6 containing the receiver, so that the energy store 30 present in the key 2 is only required when the remote control is actuated.

The electronics 14 in the key 2 consists of an integrated circuit and contains a first operating signal transmitter 15 , which can be designed as an optoelectronic transmitter, for example an infrared transmitter with an infrared transmitter diode 17 . Electronics 14 further includes a first operating signal encoder 16 , which in turn is connected to first operating signal transmitter 15 . The electronics 19 of the device 6 comprises a first, a optical receiver, such as infra-red receiver with an associated infrared receiver diode 22, formed operating signal receiver 21 and associated with the first operating signal receiver 21 first operating signal decoder 23rd As a result, a first coded operating signal can be generated in the first operating signal encoder 16 and can be transmitted from the first operating signal transmitter 15 of the key 2 to the first operating signal receiver 21 in the device 6 when the key 2 approaches the device 6 , the first operating signal in the first operating signal decoder 23 of the electronics 19 is decrypted and evaluated. In a first embodiment of the locking system 1, the locking or unlocking of the car doors 12 can already be carried out after a positive evaluation of the first operating signal, so that in this case the first operating signal is the operating signal 7 shown in FIG. 1.

In a further development of the locking system 1 , a second operating signal receiver 24 and a second operating signal decoder 26 in the key 2, as well as a second one, as an optoelectronic transmitter, for example an infrared transmitter, can now be formed as an optoelectronic receiver, for example an infrared receiver with an associated infrared receiving diode 25 Associated infrared transmitter diode 28 , trained operating signal transmitter 27 and second operating signal encoder 29 can be arranged in the device 6 . As a result, a second coded operating signal can be generated by the second operating signal encoder 29 and transmitted from the second operating signal transmitter 27 in the device 6 to the second operating signal receiver 24 in the key 2 and then decrypted in the second operating signal decoder 26 . The second operating signal then interacts with the first operating signal in a bidirectional communication, ie a positive evaluation of both the second and the first operating signal is necessary in order to enable the locking and unlocking of the car doors 12 . In this case, the operating signal 7 shown in FIG. 1 is the interacting first and second operating signal. The bidirectional communication achieves an even further improved theft security for the locking system 1 .

The function of the remote control of the central locking system is also carried out by the first operating signal transmitter 15 , in that when the button 10 is pressed, a code encrypted by the first operating signal encoder 16 as the operating signal 8 , the code of the operating signal 8 possibly being different from the code of the operating signal 7 , via which Infrared transmitter diode 17 sends unidirectionally. This operating signal 8 is received by the first operating signal receiver 21 in the device 6 on one of the car doors 12 and evaluated in the electronics 19 .

After a positive evaluation, the locking or unlocking of the car doors 12 is then effected. The electronics 14 in the key 2 are in this case supplied by the energy store 30 , so that the remote control can also function from a distance from the motor vehicle 13 , at which no energy transfer 41 from the respective device 6 to the key 2 is used.

In the described embodiment of the locking system 1 with key 2 , the coded operating signal 7 , 8 is transmitted to the device 6 as an optical signal, for example an infrared signal. The coded operating signal 9 for the ignition lock 9 can be transmitted in the same way as an infrared signal. Of course, other types of signal transmission for the operating signals 7 , 8 , 9 can also be provided by appropriate design of the operating signal transmitters and receivers, for example an RF or radio signal transmission.

As further can be seen now with reference to Fig. 3, has the sub-key 38, a housing 42 having a depression 44 at the surface. The housing 42 serves to accommodate the electronics 14 , as is indicated schematically in FIG. 3 by means of the electromagnetic transmission coil 34 , the energy store 30 and the infrared transmitter diode 17 . The mechanical key bit 45 is attached to the housing 43 of the second partial key 39 . The two housings 42 , 43 have connecting means by means of which the housings 42 , 43 can be connected to form the entire key 2 , the key bit 45 coming to lie in the recess 44 of the housing 42 such that it is essentially flush with the other surface of the housing 42 is. In the present case, the connecting means are hinges 46 . As a result, the second partial key 39 can be folded out on the first partial key 38 . In the folded-in state of the partial key 39 , the entire key 2 is thus used for electronic operation of the locking system 1 on the car doors 12 and the ignition lock 3, while when the partial key 39 is unfolded, the entire key 2 is used for mechanically actuating the locking system 1 on the glove compartment 36 or on the trunk 37 can be used by means of the key bit 45 .

The two partial keys 38 , 39 can now be separated from one another if required by removing the housings 42 , 43 from one another on the hinges 46 . As a result, only those functions that are assigned to the respective partial key 38 , 39 can be actuated on the locking system 1 . Thus, for example, the partial key 38 can be transferred as a workshop key in a workshop, the owner retaining the partial key 39 . As a result, the items stored in the glove compartment 36 or the trunk 37 are secured against unauthorized access.

In a further exemplary embodiment, which is shown in FIG. 4, the first partial key 38 , which in turn is designed as an electronic key, has a housing 42 which has an opening 47 on the rear narrow side. The key bit 45 on the housing 43 of the second partial key 39 , which is designed as a mechanical key, can be inserted into this opening 47 . If the partial key 39 is inserted into the partial key 38 in this way, a locking hook 49 on the housing 43 can be connected to a corresponding locking clip 48 on the housing 42 , so that an entire key 2 is formed. If required, the two partial keys 38 , 39 can also be separated again on the connecting means, which here consist of locking means, namely locking clip 48 , locking hook 49 and opening 47 .

In yet another embodiment shown in FIG. 5, the connecting means are a key ring 50 with which the housings 42 , 43 of the two partial keys 38 , 39 are held together at an eyelet 51 , 52 . If necessary, the two partial keys 38 , 39 can in turn be released from the key ring 50 and thus separated from one another.

A mechanical lock 53 , as indicated schematically in FIG. 1 on the left car door 12, can additionally be integrated in the locking system 1 on at least one car door 12 . This car door 12 can then not only be locked and unlocked by means of the electronic partial key 38 or the entire key 2 , as described above, but can also be unlocked by means of the mechanical partial key 39 on the lock 53 for emergency opening. This ensures that the user has access to the motor vehicle 13 even if the electronics 19 on the locking system 1 fail. This can be the case, for example, in the event of a power failure due to an empty car battery. The mechanical lock 53 can also be attached to a hidden location of the motor vehicle 13 instead of in the car door 12 .

In yet another embodiment, the trunk 37 and the glove compartment 36 also have a device 6 containing a receiver for electronically actuating the locking and unlocking of the trunk 37 and the glove compartment 36 . For this purpose, both partial keys 54 , 55 , which can be seen in FIG. 6, are designed as electronic keys, each of which contains electronics that are used for the intended operation. The operating signal of the two partial keys 54 , 55 is different, so that with the partial key 55 the car doors 12 can be locked and unlocked and the ignition lock 3 can be released and with the partial key 54 the glove compartment 36 and the trunk 37 can be locked and unlocked. This is preferably a different code for the two subkeys 54 , 55 .

The two partial keys 54 , 55 can in turn be combined by connecting means on their housings 56 , 57 to form an electronic overall key 2 . In the present case, the connecting means consist of an opening in the housing 57 of the first partial key 55 , into which the housing 56 of the second partial key 54 can be at least partially inserted. As a result, the two housings 56 , 57 form a unit for the master key 2 . With the help of the total key 2, all functions of the locking system 1 are then actuated. If necessary, the two partial keys 54 , 55 can also be separated from one another again, so that the partial key 55 can be used as a workshop key with the desired restricted functional scope for the locking system 1 .

The invention is not restricted to the exemplary embodiments described and illustrated. Rather, it also includes all professional training within the scope of the inventive concept. Such a locking system can not only be used on motor vehicles, but can also be used on doors with different access authorizations, for example in building technology. 1 locking system
2 keys
3 ignition lock
4 connecting line
5 operating unit
6 facility (containing the recipient)
7 operating signal (when approaching car door)
8 operating signal (with remote control)
9 operating signal (for ignition lock)
10 key (on key)
11 holder (on ignition lock)
12 car door
13 motor vehicle
14 electronics (in the key)
15 first operating signal transmitter
16 first operating signal encoder
17 infrared transmitter diode (in the key)
18 line (from device to electronics)
18 line (from electronics to control unit)
19 electronics (in motor vehicle)
20 control unit
21 first operating signal receiver
22 infrared receiving diode (of the first operating signal receiver)
23 first operating signal decoder
24 second operating signal receiver
25 infrared receiving diode (of the second operating signal receiver)
26 second operating signal decoder
27 second operating signal transmitter
28 infrared transmitter diode (of the second operating signal transmitter)
29 second operating signal encoder
30 energy storage
31 induction coil
32 Power transmission electronics
33 Onboard power supply line
34 electromagnetic transmission coil
35 mechanical lock
36 glove compartment
37 trunk
38 , 39 partial keys
40 arrow
41 Energy transfer
42 , 43 housing (of the partial key)
44 deepening
45 key bit
46 hinge
47 opening
48 locking clip
49 locking hooks
50 key ring
51 , 52 eyelet
53 mechanical lock (on car door)
54 , 55 partial key (further version)
56 , 57 housing (of the partial key)

Claims (7)

1. Key for an at least partially electronically operating locking system ( 1 ), in particular door locking and / or ignition lock system on a motor vehicle ( 13 ), the key ( 2 ) containing electronics ( 14 ) used for the intended operation and the locking system ( 1 ) has a receiver located on the motor vehicle ( 13 ), whereby the key ( 2 ) exchanges a coded operating signal ( 7 , 8 , 9 ) with the receiver and further means for decoding the coded operating signal ( 7 , 8 , 9 ) are provided, so that a positive evaluation of the operating signal ( 7 , 8 , 9 ) actuates a control device ( 20 ) to perform functions of the locking system ( 1 ), such as locking or unlocking the car doors ( 12 ) in a motor vehicle ( 13 ), releasing the Ignition lock ( 3 ) or the like, wherein the key ( 2 ) consists of two partial keys ( 38 , 39 , 54 , 55 ), each for actuating different radio tions of the locking system ( 1 ) are formed, and wherein the partial keys ( 38 , 39 , 54 , 55 ) each have a housing ( 42 , 43 , 56 , 57 ), characterized in that on the housing ( 42 , 43 , 56 , 57 ) the partial key ( 38 , 39 , 54 , 55 ) connecting means are arranged and that the housing ( 42 , 43 , 56 , 57 ) of the partial key ( 38 , 39 , 54 , 55 ) can be connected to the entire key ( 2 ) with the aid of the connecting means and if required can be separated from each other, such that the housing (42, 43, 56, 57) of the partial keys (38, 39, 54, 55) form a unit for the general key (2), wherein by means of the total key (2) all Functions of the locking system ( 1 ) can be operated. 2. Key according to claim 1, characterized in that the two partial keys ( 54 , 55 ) are designed as electronic keys, each of which contains electronics ( 14 ) used for the intended operation, the operating signal of the two partial keys ( 54 , 55 ) being different is in that the code for the two partial keys ( 54 , 55 ) is preferably different. 3. Key according to claim 1, characterized in that a mechanical lock ( 35 ) is included in the partially electronically operating locking system ( 1 ) and that a partial key ( 38 ) as an electronic key with an electronics ( 14 ) for intended operation and the other partial key ( 39 ) is designed as a mechanical key. 4. Key according to claim 1, 2 or 3, characterized in that in a locking system ( 1 ) for a motor vehicle ( 13 ) a first partial key ( 38 , 55 ) for actuating the car doors ( 12 ) and / or the ignition lock ( 3 ) is formed, while the further second partial key ( 39 , 54 ) is designed for actuation for the glove compartment ( 36 ) and the trunk ( 37 ). 5. Key according to claim 4, characterized in that the second partial key ( 39 ) for the glove compartment ( 36 ) and the trunk ( 37 ) is a mechanical key and that preferably at least one car door ( 12 ) by means of an optionally hidden place of the motor vehicle ( 13 ) attached mechanical lock ( 53 ) can be unlocked for emergency opening, the mechanical lock ( 53 ) also being actuated by means of the second partial key ( 39 ). 6. Key according to one of claims 1 to 5, characterized in that the connecting means consist of hinges ( 46 ) on the housing ( 42 , 43 ) of the partial key ( 38 , 39 ), so that the second partial key ( 39 ) on the first partial key ( 38 ) can be folded out and separated. 7. Key according to one of claims 1 to 5, characterized in that the connecting means consists of an opening ( 47 ) in the housing ( 42 ) of the first partial key ( 38 ) into which the housing ( 43 ) of the second partial key ( 39 ) at least is partially insertable, further locking means ( 48 , 49 ) are preferably arranged on the housing ( 42 , 43 ) of the partial key ( 38 , 39 ).