EP3131067B1 - Key for an electronic or mechatronic lock and key system and lock and key system for a key - Google Patents

Description

The invention relates to a mechatronic lock-key system, comprising a key with a shank and bow, in which a 13.56 MHz RFID chip is read out contactlessly, and a lock, the lock having a lock cylinder housing in which a cylinder core is rotatably mounted , which is provided with a key channel, into which the shaft of the key can be inserted to carry out a locking process, and wherein an electronic coding of the key evaluating electronics is arranged in the lock.

Such a system is from the EP 2709074 A1 refer to.

The invention is based on the object of creating a lock and key system with a key, in which a 13.56 MHz RFID chip can be read out contactlessly and whose security against manipulation is thereby improved.

This object is achieved with a lock and key system according to claim 1.

Preferably further developments result from the subclaims.

The implementation of the contactless reading with a fully inserted key requires a relatively large antenna surface with the current RFID media (13.56 MHz). In this case, a metal key cannot be used, as the metal of the key would make reading impossible. As already known, the antenna can also be integrated into the key bow. There is the problem of reading, since the reading antenna arranged in the cylinder core can only read the medium with difficulty over this distance / angular position. The 13.56 MHz RFID antenna can be embedded in a ceramic key shaft. Technical ceramics are no longer brittle today; they can even achieve a certain elasticity (as with knife edges, for example). Hence there is According to the invention, the key shaft made of technical ceramic, in which an antenna made of tungsten wire is inserted. The antenna wire must have a high temperature resistance because the ceramic has to be fired after molding and pressing. The ends of the tungsten wire would then protrude from the part of the key shaft facing the bow and are then connected to the RFID chip. The RFID chip is located in the key's plastic bow, which then surrounds the ceramic key shaft in a form-fitting manner. The power supply for the electronics located in the core can be accommodated in the cylinder housing.

Furthermore, simple profiles or countersinks for coding purposes can also be provided in the production form of the ceramic.

In order to rule out that such a key is made entirely of plastic, a material query / check is integrated in the cylinder core. This material query should query the properties of the ceramic, i.e. the hardness and the smooth surface. A hardened plate can be used for this purpose, which allows a sharp edge to slide over the ceramic surface when the key is inserted. By means of spring force, this hardened edge presses on the key shaft and is brought into a certain position by the key surface, in which it releases a tumbler that is arranged in the cylinder housing.

If a key with a plastic shaft were used, the edge of the plate would “hook in” and make further key insertion significantly more difficult or impossible, and would not reach the required position for releasing the tumbler.

One of the advantages is an "extravagant" key, in which the key shaft can consist of technical ceramic (different colors are also possible - white, blue ...). The key shaft can contain the RFID antenna because it is made of non-conductive ceramic Features such as profiling or constant coding can also be incorporated into the form.

• Fig. 1 zeigt einen Profilzylinder (5) mit halb eingeführtem Schlüssel (1) und Schnittlinie A-A.
• Fig. 2 zeigt den Schnitt A-A mit ebenfalls halb eingeführtem Schlüssel,
  Die üblichen Bestandteile eines Schloss - Schlüssel - Systems sind der Schlüssel 1, der Schließzylinder 5 und der drehbar in diesem gelagerte Zylinderkern 6. Der Zylinderkern weist einen Schlüsselkanal auf, in den der Schlüssel zur Ausführung eines Schließvorganges einführbar ist.
  Eine Platte 7 steht mit seiner Anlaufschräge 13 etwas in den Schließkanal hinein und wird durch einen Stift 8 in seiner Position gehalten. Seine Führung 11 im Zylinderkern 6 lässt ein Verkippen zu; ebenso seine Bohrung 12, die größer ist als der hindurch gehende Stift 8. Der federbelastete Gehäusestift 10 drückt über einen ballig geformten Stift 9 die Platte 7 in Richtung Schließkanal.
• Fig, 2a zeigt einen vergrößerten Ausschnitt des federbelasteten Stiftes 10, der im Zylindergehäuse 5 angeordnet ist. Dieser drückt durch seine Feder 15 den balligen Stift 9 in Richtung Schließkanal.
• Fig. 3 zeigt ebenso den Schnitt A-A, allerdings ist der Schlüssel jetzt vollständig eingeführt, Die scharfe Kante 14 der Platte 7 "kratzt" beim Einführen des Schlüssels über dessen Oberfläche und prüft damit die Oberflächenbeschaffenheit und die Härte, da die Platte federbelastet ist,
  Wird der korrekte Schlüssel identifiziert, dann steht die Platte 7 in einer Position in der der Stift 9 den federbelasteten Stift 10 so weit in das Zylindergehäuse 5 drückt, dass der Zylinderkern 6 gedreht werden kann.
  Im Zylinderkern 6 ist die Elektronik 4 so angeordnet, dass die Antenne des Schlüssels mit der Antenne der Elektronik kommunizieren kann.
• Fig. 4 zeigt die Vorderansicht des Profilzylinders mit eingeführtem Schlüssel (1). Hier ist die Schnittlinie B-B eingezeichnet.
• Fig. 5 zeigt den Schnitt B-B, wobei der Schlüssel mit seiner integrierten Antenne 3 zu sehen ist. Die Schlüsselreide 18 aus Kunststoff umschließt den keramischen Schlüsselschaft 16. In der Reide 18 befindet sich der RFID-Chip 2, der mit der Antenne 3 verbunden ist.
  Im Zylindergehäuse 5 befindet sich die Spannungsversorgung 17 für die im Zylinderkern angeordnete Elektronik 4.
• Fig. 6 zeigt den Schlüssel mit Kunststoff-Reide 18 und Keramik-Schaft 16, in dem auch Profilmerkmale 19 und / oder Codiermerkmale 20 vorhanden sein können.

The invention is explained in more detail below with reference to the drawings.

• Fig. 1 shows a profile cylinder (5) with half-inserted key (1) and section line AA.
• Fig. 2 shows the section AA with the key also half inserted,
  The usual components of a lock-key system are the key 1, the lock cylinder 5 and the cylinder core 6 rotatably mounted in it. The cylinder core has a key channel into which the key can be inserted for performing a locking process.
  A plate 7 projects with its run-on bevel 13 somewhat into the closing channel and is held in its position by a pin 8. Its guide 11 in the cylinder core 6 allows tilting; likewise its bore 12, which is larger than the pin 8 passing through it. The spring-loaded housing pin 10 presses the plate 7 in the direction of the locking channel via a crowned pin 9.
• Fig, 2a shows an enlarged section of the spring-loaded pin 10, which is arranged in the cylinder housing 5. This presses the spherical pin 9 in the direction of the closing channel by its spring 15.
• Fig. 3 also shows the section AA, but the key is now completely inserted. The sharp edge 14 of the plate 7 "scratches" over its surface when the key is inserted and thus checks the surface quality and hardness, since the plate is spring-loaded,
  If the correct key is identified, the plate 7 is in a position in which the pin 9 presses the spring-loaded pin 10 into the cylinder housing 5 so far that the cylinder core 6 can be rotated.
  The electronics 4 are arranged in the cylinder core 6 in such a way that the antenna of the key can communicate with the antenna of the electronics.
• Fig. 4 shows the front view of the profile cylinder with inserted key (1). The section line BB is drawn in here.
• Fig. 5 shows the section BB, the key with its integrated antenna 3 can be seen. The key head 18 made of plastic encloses the ceramic key shaft 16. The RFID chip 2, which is connected to the antenna 3, is located in the head 18.
  The power supply 17 for the electronics 4 arranged in the cylinder core is located in the cylinder housing 5.
• Fig. 6 shows the key with plastic bow 18 and ceramic shaft 16, in which profile features 19 and / or coding features 20 can also be present.

Claims (3)

1. Mechatronic lock-key system, comprising a key with shaft and key bow, in which a 13.56 MHz RFID chip is read out contactlessly, and a lock, the lock having a lock cylinder housing (5), in which a cylinder core (6) is mounted rotatably and is provided with a key channel, into which the shaft (16) of the key (1) can be inserted in order to implement a locking process, and an electronics unit (4) which evaluates an electronic coding of the key (1) being disposed in the lock,
   characterised in that
   the shaft of the key consists of a ceramic material, and in that an RFID antenna made of tungsten wire is embedded in the latter and is connected conductively to the RFID chip disposed in the key bow,
   in that a voltage supply (17) for the electronics unit (4) disposed in the cylinder core (6) for reading out the RFID chip (2) disposed in the key (1) is present in the cylinder housing (5),
   in that a testing element which is pivotable in the key channel is provided in the cylinder core (6), which testing element consists of a pivotable hardened plate (7) with a starting bevel (13) and a sharp edge (14) which can be pressed against the shaft (16) of the key (1), which is partially inserted into the key channel,
   during insertion of the key shaft, the sharp edge (14) scratching over the ceramic surface thereof and hence testing the hardness and smoothness of the shaft material,
   the starting bevel (13) being able to be pressed back out of the key channel into the cylinder core respectively according to the surface property and the hardness of the shaft,
   and in that the plate (7) is in engagement on the side orientated away from the key channel with a locking pin (10) which is provided in the wall of the lock cylinder housing, is springloaded and can be pressed over the separating plane between cylinder core and lock cylinder housing, the dimensions of the plate (7), the starting bevel (13) thereof, the sharp edge (14) thereof, and of the locking pin (10) being coordinated to each other such that when a tested key with key shaft made of a ceramic material has been inserted fully in the key channel, the locking pin (10) is pressed into the wall of the lock cylinder housing, so that the separating plane is released and rotation of the cylinder core and hence a locking process can be implemented.
2. Key according to claim 1,
   characterised in that
   the key bow of the key consists of plastic material.
3. Key according to one of the preceding claims,
   characterised in that
   the shaft has a mechanical coding with profile- and/or coding features.

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