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| Control that enables/disables a user interface |
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| Adaptive geographic mapping in vehicle information systems |
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| Photoelectric keyboard |
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| Seal membrane with integral microphone support |
| OF THE PREFERRED EMBODIMENT Referring now to the drawings and in particular to FIG. 3, a unitarily ... |
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| Weatherproof electronic keypad with replaceable graphics overlay |
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| Splash water protected keyboard |
| In a splash-water protected keyboard having a contact foil arranged in a housing and a rubber mat ... |
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Electronic key
| Details |
Inventors: Mattes, Johannes; Muller, Karl;
Assignee: Marquardt GmbH (Rietheim-Wilheim, DE)
Primary Examiner: Horabik; Michael
Assistant Examiner: Dalencourt; Yves
Attorney, Agent or Firm: Venable, Kinberg; Robert
An electronic key for use with a vehicle locking system controls at least one of a door locking feature and an ignition lock feature on the vehicle. The electronic key has a transmitter/receiver for transmitting at least one coded operating signal generated by the electronic key and transmitted from the electronic key to the locking system to activate at least one function of the locking system upon positive evaluation of the transmitted operating signal by the locking system. Actuating members are provided on the key and operated by the user to cause the transmitter/receiver to transmit the coded operating signal, and the activating elements are also adapted for the user to enter an individual code. A circuit is provided for receiving the entered individual code and comparing it with a programmed individual code and, upon entry of the programmed individual code being detected, changing the key over from a first, activated state in which transmission of the coded operating signal is prevented to a second, inactivated state in which transmission of the coded operating signal is permitted. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
1 shows diagrammatically, in terms of some of its functions, a locking system 1 which is intended for an automobile.
With the aid of an electronic key 2, the locking system 1 can be activated by remote control for access authorization, in the present case the automobile doors 4 and the automobile trunk lid, not shown in any more detail, can be locked and unlocked by remote control up to a certain maximum distance from the automobile, and, if appropriate, further functions on the automobile can also be triggered.
Actuating members 14, 15, 16 on the housing 17 of the key 2 serve for activating said functions and are actuated manually by the user.
The actuating members 14, 15, 16 of the key 2 are designed as buttons and are provided with symbols which indicate the corresponding functions.
In the present case, there are three buttons, specifically a locking button 14 for locking the automobile doors 4, an opening button 15 for unlocking the automobile doors 4 and a trunk button 16 for opening the trunk lid.
Means serving for the intended operation of the key 2 are arranged in the housing 17.
These means, which are assigned to the front part 18 of the housing 17 and which are supplied with energy from a battery 33 or other energy source shown diagrammatically in FIG.
3 and located in the housing 17, are a transmitter 22 and, if appropriate, a receiver 23, which are to be seen in more detail in FIG.
2.
A coded operating signal 8 can thereby be transmitted between the key 2 and a reception and transmission device 10 for the locking system 1, said device being arranged centrally in the automobile, for example on the interior mirror 7, the transmission of the operating signal 8 being triggerable by means of the actuating members 14, 15, 16.
The transmitted operating signal 8 is fed to a signal processing device 6 located in the automobile, and, after positive evaluation of the operating signal 8, that is to say if the key 2 is authorized, a control unit 5, which is located, for example, in the respective automobile door 4 and which is connected to the signal processing device 6, for example via a bus system 12, such as the known CAN bus, is actuated in order to lock or unlock the automobile doors 4 or the trunk lid
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Coded 
