EP0977929B1 - Locking device - Google Patents

Abstract

A locking device including at least one key and a lock cylinder having at least one cylinder core pivotally mounted in a cylinder housing and having a keyway is provided with a blocking element which in its blocked position prevents rotation of the cylinder core with the key, and in its release position permits rotation of the cylinder core with the key. Further provided are an actuator which blocks the blocking element in the blocked position and releases it in the release position, and an electronic code transmitter in the key and an electronic code evaluator which controls the actuator. The lock cylinder is provided with a cylinder armor having an armor housing covering the cylinder housing and an armor disk pivotally mounted therein with a key insertion slot flush with the keyway of the cylinder core. The blocking element and the actuator are disposed in the armor housing. In its blocked position the blocking element acts on the armor disk so as to prevent rotation, releasing it in the release position.

Description

The invention relates to a locking device an electronically coded key according to the generic term of claim 1.

Such a locking device is from DE 195 17 728 A1 known. The locking cylinder is with a cylinder bag provided, the actuator designed as an electric motor receives. The key channel is to the peripheral surface of the Open cylinder core. The locking element is a bracket trained, which with its two ends in two Recesses in the peripheral surface of the cylinder core on the one or the other side of the open key channel in the axial area of the Engages the cylinder core. The trained as an electric motor, The electric motor arranged in the cylinder bag has a shaft two opposite cams on in the locked position engage on the bracket or on the cylinder housing.

The known locking device with electronic-mechanical encoded key has been on the whole proven. However, the entire cylinder lock needs to be replaced become. Also only cylinder locks with cylinder bags be converted to this locking device.

DE 42 07 161 A1 discloses a locking device with a Lock cylinder emerged, in the form of a additional coverage an additional electronic Lock is provided. This contains a cap, which rotates with the cylinder core.

DE 297 03 063 U1 is an additional electromagnetic Locking for the cylinder core known, which in Recesses attacks on the circumference of the cylinder core.

Furthermore, in DE 196 53 113 A1 the configuration of a ring-shaped coil as an antenna for data transmission a cylinder lock with additional electronic Protection described.

The object of the invention is practically all Cylinder locks in one without having to replace them such locking device with electronic, in particular to convert electronic-mechanical coding.

This is according to the invention with that in claim 1 marked locking device reached. In the Advantageous refinements of the Invention reproduced.

The security of locking cylinders often still allows wish left. For example, they can be turned a screw in the key channel or through others Demolition tools are broken open. To lock cylinder to better secure them, they are therefore protected with a so-called Cylinder armor provided from one to the Lock cylinder slipped massive armored housing consists in a massive armored disc with a Key slot is rotatably mounted. Armor housing and armor plate consist of a hard Steel, e.g. Stainless steel.

The invention is based only on the idea that electronic coding of the key to access the Key channel in the cylinder core with the armored disk too check. For this purpose, the lock cylinder according to the invention provided with such cylinder armor. The Cylinder armor contains the actuator in the tank housing as well as the blocking element which he can actuate, in one such an arrangement that it is in the locked position on the Armor plate attacks in its rotation preventing Release position releases the armored disk.

That means, as with a conventional cylinder armor the armored disk prevents access to the key channel in the Cylinder core with a screw or the like. Breaking tool. At the same time, the armored disk has the function, one Rotation of the cylinder core only if applicable electronically allow encoded key.

The locking member preferably engages in a recess on Circumference of the armored disk. It is in its locked position preferably spring-loaded. The power to engage the Locking organ in the locked position, i.e. in the recess in The circumference of the armored disk is thus by the spring applied. The disengagement of the locking member from the recess in the armored disk, thus releasing the rotation of the Armored disc, done by manual force when turning of the key inserted in the cylinder core.

To facilitate disengagement, sliding surfaces or Rolling elements, for example a ball or a roller on Blocking member or be provided in the recess. In order to sets the blocking organ in the blocking position of a violent Rotation of the armored disk counteracts a high shear force. On the other hand, it slides or rolls out of the recess and then over the circumference of the armored disk if the Cylinder core is turned with the key.

The actuator can be an electromagnet, for example. However, it is preferably by an electric motor formed which moves a limb in the locked position preferably both on the locking member and on the tank housing attacks. The actuator is thus bi-stable. That is, the Electric motor has both in the locked position as the Release position of the armored disk in a de-energized state on.

The link that is moved by the electric motor can Mother of a worm gear, which in the Armored housing is slidably guided and into which a thread engages on the motor shaft. It is also possible to link for example as an eccentric on the camshaft to form two opposing cams, the two cams in the locked position of the armored disc on the Support the locking device or the tank housing.

Because the displacement of the locking member in the locked position done by the spring mentioned, while the force to Movement of the blocking member in the release position at Turning the cylinder core is applied manually, one can very small trained motor can be used in the Armored housing can be accommodated to save space.

Its energy consumption is also low. For energy supply a battery of the actuator or motor can be provided, that can be placed in the door. Preferably but also the power supply in the cylinder armor integrated, for example a button battery in the Armored housing provided. Likewise, the code evaluator in be arranged in the tank housing.

The main advantage of the invention is therefore that the locking cylinder already in the door is completely can remain unchanged because only the cylinder armor with the locking member and the actuator and, if necessary, the electronic code interpreter and the Power supply unit on the lock cylinder on the security-endangered, i.e. put the outside on and on needs to be attached to it.

The cylinder armor can be dimensioned so that it fits on almost every locking cylinder. It is with it fabrikat independent. That is, practically everyone Lock cylinder, as for example Euro profile, round or Oval cylinder is easy to assemble at any time retrofittable according to the invention.

It is understood that both Cylinder locks with a cylinder core, like Double cylinder locks retrofitted with two cylinder cores can be. In the latter case, the cylinder core on the security end, for example on the Outside of a door, with the invention Cylinder armor provided.

The cylinder core on the inside of the door is then only through the mechanical coding of the key can be unlocked.

According to the invention, the key can only be electronically encoded. However, since usually conventional locking cylinders with mechanical tumblers the cylinder armor according to the invention are provided, electronic coding generally only provides one additional code to the mechanical code of the key.

The electronic code transmitter in the key is preferred through a transponder and the electronic code interpreter in the cylinder armor, preferably by a Transponder reading device, formed. The Key preferably a ferrite antenna. If he as Reversible key is formed, are two ferrite antennas provided, one on one and the other on other side of the key bow. The arrangement of the Ferrite antennas on the tank housing and on the key so that when the lock cylinder is inserted Key only a narrow air gap between the Ferrite antenna in the tank housing and the ferrite antenna of the Key arises, so that only minimal transfer Energy losses occur.

The transponder reading device comprises a microprocessor and a non-volatile memory. Furthermore, in generally a clock for the date and time function with a quartz oscillator is provided as a time base. The actuator is controlled directly by the microprocessor.

If the key is removed, that is Key ferrite antenna from the ferrite antenna in the Moved the tank housing, the locking element moves the Actuator in the locked position. When turning the in Lock cylinder inserted key moves Ferrite antenna of the key but also of the ferrite antenna away in the tank housing. That said, you wouldn't get any additional Take action if the actuator were to turn the Actuated lock cylinder, and he would try that Push the locking device into the locked position.

To prevent this, i.e. the actuator when turning the A twist sensor, for example a piezo element or a switch Detection of the rotational position of the armored disk or the Cylinder core may be provided. Because when turning the Armor plate or the cylinder core itself in the locking element the release position, the switch is preferred trained so that it is actuated by the locking member, if this is in the release position.

The terms "locking cylinder", "cylinder housing", "cylinder core", "Key channel" and "key" are according to the invention to interpret widely. For example, the invention extends also on rotatably mounted carriers in a housing, if the driver has a recess, e.g. a Polygonal recess, has a key-like tool, e.g. with polygon, is pluggable. Likewise, the tank housing can also be replaced by a Fitting part are formed.

Fig. 1

eine perspektivische Ansicht einer Zylinderpanzerung nach einer Ausführungsform der Erfindung;

Fig. 2

einen Längsschnitt durch einen Schließzylinder mit der Zylinderpanzerung nach Fig. 1 in der Sperrstellung;

Fig. 3

einen Querschnitt entlang der Linie III-III in Fig. 2;

Fig. 4

einen Längsschnitt durch eine andere Ausführungsform in der Freigabestellung;

Fig. 5

einen Querschnitt entlang der Linie V-V in Fig. 4;

Fig. 6

einen Längsschnitt durch eine andere Ausführungsform in der Sperrstellung;

Fig. 7

einen Querschnitt entlang der Linie VII-VII in Fig. 6 und

Fig. 8

einen Längsschnitt durch noch eine andere Ausführungsform in der Sperrstellung.

Various embodiments of the locking device according to the invention are explained in more detail below using the drawing as an example. In it show:

Fig. 1

a perspective view of a cylinder armor according to an embodiment of the invention;

Fig. 2

a longitudinal section through a lock cylinder with the cylinder armor of Figure 1 in the locked position.

Fig. 3

a cross section along the line III-III in Fig. 2;

Fig. 4

a longitudinal section through another embodiment in the release position;

Fig. 5

a cross section along the line VV in Fig. 4;

Fig. 6

a longitudinal section through another embodiment in the locked position;

Fig. 7

a cross section along the line VII-VII in Fig. 6 and

Fig. 8

a longitudinal section through yet another embodiment in the locked position.

1, a cylinder armor 1 consists of a Armored housing 2 with an end wall 3 and a peripheral wall 4. In the end wall 3 is an armored disk in a bore 6 rotatably mounted, the key slot 7th having. The armored housing 2 and the armored disk 3 consist of several millimeters thick steel, e.g. Stainless steel.

In Fig. 2 is a double cylinder lock 10 with two Cylinder housing halves 8, 9 shown, each in one Cylinder core 11, 12 is rotatably supported. each Cylinder housing half 8, 9 is with a cylinder bag 13, 14 Mistake. There is a between the cylinder housing halves 8, 9 Recess for a lock bit 16 provided with a Coupling, not shown, with the cylinder cores 11 and 12 is rotatably connected. The bore 18 is used for attachment of the double cylinder lock 10 with a screw on the door.

For example arranged on the outside of the door Cylinder housing half 8, the cylinder armor 1 is inserted, so the face and the circumference of the Cylinder housing half 8 covered by the cylinder armor 1 become. The cylinder armor 1 is on the Cylinder housing half 8 attached, in such a way that the Key slot 7 with the key channel of (unactuated) cylinder core is aligned. The armored disk 6 is by an annular shoulder 15 which is in an annular groove 17 the inside of the end wall 3 of the armored housing 2 is arranged, secured against pulling.

In the peripheral wall 4 of the cylinder armor 1 is on the the armor plate 6 facing away from the lower side in a corresponding longitudinal shot on the inside as an actuator an electric motor 19 is arranged. In the front wall 3 of the Cylinder armor 1 is in a corresponding guide the inside of a locking member 21 radially back and forth slidably mounted.

The blocking member 21 prevents in Fig. 2 and 3rd shown blocking position the rotation of the armored disk 6, while it is in the release position shown in Fig. 5 allows the rotation of the armored disk 6. By blocking the rotation of the armored disk 6 according to FIGS. 2 and 3 at the same time the rotation of the cylinder core 11 with the key 22 prevented and thus the lock 10 locked while at armor disk 6 released for rotation according to FIGS. 4 and 5 the cylinder core 11 rotated and thus the lock 10 opened can be provided that the (not shown) Wells or other mechanical coding of the Key 22 moves the tumblers (not shown) of the cylinder lock 10 in the release position.

The locking member 21 is a bracket with two ends 24, 25th formed in two recesses 26, 27 on the circumference of the Armored disk 6 on one or the other side of the Key slot 7 engage, which Locking element or the bracket 21 by springs 28, 29 in the Are engaged position (Fig. 3).

The motor shaft 31 of the electric motor 19 is threaded 32 provided which engages in a nut 33 which in a corresponding longitudinal recess 34 on the inside of the Cylinder armor 1 is slidably mounted such that 2 and 3 between the Locking element or bracket 21 and the peripheral wall 4 of the Cylinder armor 1 is arranged while in the 4 and 5 to the electric motor 19 is shifted so that the locking member or the bracket 21st against the force of the springs 28, 29 from the armored disk 6 is radially displaceable.

That is, that shown in Figs. 4 and 5 Release position by turning the in the cylinder core 11 inserted key 22 the ends 24, 25 of the bracket 21st out of the recesses 26, 27 in the armored disk 6 the force of the springs 28, 29 pressed, whereupon the cylinder core 11 is freely rotatable.

In the end wall 6 of the tank housing 2 is a twist sensor 35 arranged, which detects the position of the locking member 21 and thus prevents the electric motor 19 after the release of the Armored disk 6 actuated when rotating the armored disk 6 becomes.

1 to 3 is on the end wall 3 of the tank housing 2 a ferrite antenna 36 in a corresponding bore arranged. The antenna 36 is connected to an electronic one Code evaluator 37, for example one Transponder reader connected in a Recess on the inside of the peripheral wall 4 of the Armored housing 2 is arranged. The Energy supply device 38 is by a Button battery formed in a recess on the Inside of the peripheral wall 4 of the cylinder housing 2 on the the code evaluator 37 is arranged opposite side.

The key 22 is on the key cord 40 with a Provided ferrite antenna 41, which is connected to an electronic module 42 is connected, which is the data carrier or encoder contains. The module 42 can be designed as a transponder his.

The embodiment according to FIGS. 4 and 5 differs from 2 and 3 essentially in that the Code interpreter and the power supply unit not in that Cylinder armor 1 are arranged, but for example the inside of the door.

In the embodiment according to FIGS. 6 and 7, the Code evaluator 37 connected antenna as ring antenna 43 trained concentrically around the hole for the Armor plate 2 on the end wall 3 of the armor housing 2 is arranged. The ring antenna 43 has a larger one Performance, i.e. the advantage in addition to a longer range faster data transmission and therefore shorter Closed. In addition, in this embodiment, if necessary the rotation sensor 35 can be dispensed with.

In the embodiment according to FIG. 8, the ferrite antenna is 44 arranged in an inner recess in the end wall 3, that is offset inwards and therefore not accessible from the outside. The Key 22 is designed as a reversible key. Accordingly, there is a ferrite antenna 45, 46 in the area of each Narrow side of the key shaft provided, namely in the area of the key shaft that is in the Armored disc 6 is located when the key 22 in the Key channel of the cylinder core 11 is inserted.

Claims (13)

1. A locking device comprising at least one key and a lock cylinder having at least one cylinder core or similar driver pivotally mounted in a cylinder housing and having a keyway, a blocking element which in its blocked position prevents rotation of the cylinder core with the key and in its release position permits rotation of the cylinder core with the key, an actuator for blocking the blocking element in the blocked position and releasing it in the release position, and an electronic code transmitter in the key and an electronic code evaluator which controls the actuator, characterized in that the lock cylinder (10) is provided with a cylinder armor (1) having an armor housing (2) covering the cylinder housing (8) and an armor disk (6) pivotally mounted therein with a key insertion slot (7) flush with the keyway of the cylinder core (11), the blocking element (21) and the actuator are disposed in the armor housing (2), and the blocking element (21) in its blocked position acts on the armor disk (6) so as to prevent rotation and in its release position releases the armor disk (6).
2. A locking device according to claim 1, characterized in that the blocking element (21) in its blocked position engages at least one recess (26, 27) disposed on the circumference of the armor disk (6).
3. A locking device according to claim 2, characterized in that the blocking element (21) is formed as a stirrup engaging at its two ends (24, 25) two recesses (26, 27) on the circumference of the armor disk (6) on either side of the key insertion slot (7).
4. A locking device according to any of claims 1 to 3, characterized in that the blocking element (21) is springloaded to its blocked position.
5. A locking device according to any of the above claims, characterized in that the power supply unit (38) and/or the code evaluator (37) are disposed in the armor housing (2).
6. A locking device according to any of the above claims, characterized in that the actuator is formed by an electric motor (19) or an electromagnet.
7. A locking device according to claim 6, characterized in that the electric motor (19) moves a member which in the blocked position acts on the blocking element (21), on the one hand, and on the armor housing (2), on the other hand.
8. A locking device according to claim 7, characterized in that the member is formed by the nut (33) of a worm gear.
9. A locking device according to claim 1, characterized in that an antenna (36, 43, 44) is provided in the armor housing (2) for receiving the code information of the electronic code transmitter (42) in the key (22).
10. A locking device according to claim 9, characterized in that the antenna for receiving the code information extends in the end wall (3) of the armor (2) around the armor disk (6) as a ring antenna (43).
11. A locking device according to claim 9, characterized in that the antenna (45, 46) is provided on the key (22) in the area of the key shaft disposed in the armor disk (6) when the key (22) is inserted in the cylinder core (11).
12. A locking device according to any of the above claims, characterized in that the electronic code transmitter is formed by a transponder (42), and the electronic code evaluator (37) by a transponder reading device.
13. A locking device according to claim 1, characterized in that a rotation sensor (35) is provided in the armor housing (2) for detecting the position of the blocking element (21) for nonoperation of the actuator upon rotation of the key (22).

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