DE19861400B4 - lock cylinder - Google Patents

Abstract

A lock cylinder, comprising: a cylinder housing (1) which can be inserted into a door lock, a lock bit (3) rotatably mounted with respect to the housing (1) for actuating locking devices of the door lock, a door-side handle (4) rigidly connected to the cylinder core (2) and the lock bit (3) is coupled to its actuation, a rotatable rotary shaft directed coaxially with the cylinder core (2) towards the outside of the door and rigidly connected to a handle (6) arranged on the outside of the door, an electromagnet (8) arranged in the cylinder core, the one within the cylinder housing (1) mounted clutch actuated, which establish a rotational connection between the rotary shaft and the cylinder core (2) and can pick up again, an access control electronics (7) for verifying the access authorization of an access person requesting the access control electronics (7 ) a data exchange with an identifier of a Accessing person according to a specified access control protocol to verify the access authorization and wherein the access control electronics (7) in the door inner handle (4) is arranged, and the solenoid controls so that the electromagnet, the outside door handle (6) for actuating the Schließbarts (3) coupled with the cylinder core (2).

Description

The invention relates to a lock cylinder, in particular an electronic lock cylinder for use in mortise locks for doors.

Mortise locks for doors according to DIN 18251 are provided in large numbers with mechanical lock cylinders according to DIN 18252. Such lock cylinders have a cylinder housing and therein a cylinder core, which can be rotated with a matching key in the housing and then an approximately from the center of the cylinder housing, within the mortise from the cylinder housing protruding cam (driver) moves to the castle up or lock up.

The known mechanical lock cylinder can be many wishes in terms of security, lock layout and flexibility, because the mechanical keys are easily copied, closing tarpaulins that indicate which person to which door access must be structured substantially hierarchical and key loss and locking plan modification, the lock cylinder completely replaced.

To avoid these problems, electronic locking systems have been proposed. An example of such a locking system is in DE 44 38 832 A1 and DE 195 02 288 A1 specified. For him, a mortise lock for doors is modified so that the lock cylinder is replaced by a linkage, which has on the inside and the outside of the door each have a knob. The linkage includes a driver, which operates the lock as in a mechanical lock cylinder. The driver is rotatably connected to the inside door knob and an electromagnetically actuated clutch with the outside door knob. An electronic controls the clutch so that it produces a rotational connection only when the outside of the door within the range of an antenna is an identifier, such as a button or card-shaped radio frequency transponder, which has received an access authorization in a previous programming operation. Electronics, antenna and an electromagnetic actuator for actuating the clutch are distributed on inside and outside door fittings. However, this arrangement is very expensive to protect against manipulation and appropriate security measures lead to expensive and unsightly door fittings.

In U.S. 4,901,545 and U.S. 5,447,047 Door locks are specified, in which in addition to a mechanical lock electronic access control components are included in the door outside pommel or pusher. This arrangement is susceptible to manipulation. A special lock with integrated electronics, which is partially housed in the outer door fitting, is in U.S. 4,820,330 specified.

DE 34 01 108 A1 writes the arrangement of an electronics, here for a light switch, in a door handle.

Finally, reference is made to the press release in the magazine W & S 5/97, page 77, entitled "Locking System in the Smallest Space", in which an electronic locking system based on a rosette fitting is briefly discussed.

The patent application DE 196 12 156 A1 Finally, refers to a door lock with a nut and the nut rotatably protruding pusher pin on which the pusher on the inside and the outside of the door is attached.

The invention has for its object to provide a simple yet secure, flexible lock system. The solution of this problem is achieved by creating a lock cylinder according to the claims.

A lock cylinder is relatively compact and can be produced inexpensively. He offers little attack surface against manipulation attempts from the outside of the door. Nevertheless, there is sufficient space in the door-side handle for the access control electronics that verifies the access authorization of a person requiring access. There, the access control electronics are protected against violent manipulation attempts from the outside of the door.

The subclaims are directed to preferred embodiments of the invention. In this case, the features of the dependent claims particularly expedient electronic embodiments. The wireless exchange of information between an identifier and the access control electronics by means of a magnetic alternating field allows in comparison to a purely electric E-alternating field (for example, a high-frequency field) and a secure execution of the access control protocol between identifiers the outside of the door and access control electronics on the inside of the door through heavily secured metal-armored doors.

The remaining subclaims relate to mechanically expedient embodiments of the invention. Since the access control electronics housed in the door knob, the cylinder housing to the outside of the door can be a massive and highly effective Bohrschutz and otherwise a robust electrically or electromagnetically actuated by the access control electronics coupling between the Take the outside door handle and the cam. Instead of a clutch that rotatably coupled with otherwise verifiable access authorization the otherwise freely rotatable outside door handle with the lock bit, a lock can be provided which releases the otherwise obstructed against the cylinder housing outside door handle, so that it can be manually operated with entrainment of Schließbarts.

Advantageously, the lock cylinder is free of conventional mechanical access control components such as tumblers for interacting with mechanical keys, so that there is sufficient space for a secure Bohrschutz and a robust electromechanical coupling available. In addition, the outer dimensions of the cylinder housing should correspond to those of a mechanical standard cylinder (DIN 18252 Part 2) in order to produce compatibility with conventional mortise locks.

In the drawing, the single figure is a sectional view through a lock cylinder according to a preferred embodiment of the invention.

The lock cylinder shown has a cylinder housing 1 with the substantially standardized outer dimensions of a profile cylinder on (DIN 18252 Part 2) and is therefore suitable for installation in mortise locks for doors. The cylinder housing 1 takes a rotatable cylinder core 2 on, on the one hand rigidly rotationally fixed with an approximately in the middle of the cylinder from the cylinder housing 1 outstanding cam-lock 3 and on the other hand also non-rotatably with a arranged on the inside of the door outside the cylinder housing handle in the form of a rotary knob 4 connected is.

Coaxial to the cylinder core 2 , towards the outside of the door, takes the cylinder housing 1 a likewise rotatable rotating shaft 5 on. This is rigid with one on the outside of the door outside the cylinder housing 1 arranged handle 6 connected in the form of a knob.

The terms inner door and door outside are here in view of the preferred installation direction of the lock cylinder in the mortise lock 1 a door used. It should be a particularly high level of security against the use of force from the outside of the door and opening the door lock from this side only be possible with established access authorization. In contrast, the lock can be operated from the inside of the door without verification of the access authorization or at least not as strong as secured from the outside of the door.

In the inside door knob 4 is an access control electronics 7 arranged for the verification of the access authorization of an accessing person. The access control electronics 7 controls an electromagnet 8th on, who has a clutch 9 operated, the a rotational connection between the rotary shaft 5 and the cylinder core 2 can make or pick up again.

In the rotation shaft 5 is a drill protection 10 made of very hard material, a boring of the turning shaft 5 from the outside of the door with the aim of forcibly closing the clutch 9 to prevent. In a drilling trial, the drill is thus in the Bohrschutz 10 wedge and this with the rotation shaft 5 turn around without getting into the drill protection 10 to be able to work into it.

In the door outside turning knob 6 there is enough space for a battery 11 available to the access control electronics 7 with the electromagnet 8th can supply energy for a long period of time.

At rest, the electromagnet 8th de-energized and the clutch 9 open. Therefore, only a turn on the inside door knob 4 for movement of the Schliessbarts 3 and thus to unlock or lock a lock into which the lock cylinder is inserted. The outside door knob 6 turns blank.

A person who wants to open or close the lock from the outside of the door needs an identifier with a transponder for wireless communication with the access control electronics 7 , The transponder can work passively or actively and be permanently activated at all times or only at the push of a button. With the transponder activated within the range of the wireless communication to the access control electronics 7 both exchange data according to a defined access control protocol, which enables the access control electronics to determine the identity of the identifier and to verify that it grants access authorization to the room secured by the present lock cylinder. Only if this is the case, the access control electronics briefly controls the electromagnet 8th on, the clutch 9 so actuated that a rotational connection between the rotary shaft 5 and the cylinder core 2 will be produced. This is the outside door knob 6 for a short time with the cam 3 coupled and the door can be locked or unlocked from the outside. After a few seconds, the access control electronics will stop 7 the electromagnet 8th again de-energized and the clutch 9 separated by spring force the connection between the rotating shaft 5 and the cylinder core 2 so that the outside door knob 6 turns empty again.

The electromagnet 8th is in the cylinder core 2 arranged and contains a cylindrical coil 12 and a core axially displaceable therein 13 , The coupling 9 may include any pair of interlocking elements such as claws or teeth associated with the rotary shaft 5 or the cylinder core 2 coupled and from the magnetic core 13 can be brought into engagement.

The outer knob 6 is preferably removable to the battery 11 to be able to change.

For communication with the identifier is the access control electronics 7 preferably with a ferrite rod antenna 14 Mistake. This is how communication takes place via a B-field in the long-wave, long-wave or medium-wave frequency range, which can also penetrate heavily metal-reinforced doors. This allows the antenna 14 together with the access control electronics 7 in the inside door knob 4 Where it is protected from manipulation from the outside of the door.

Claims (8)

Lock cylinder, comprising: a cylinder housing which can be inserted into a door lock ( 1 ), one with respect to the housing ( 1 ) rotatably mounted cam ( 3 ) for actuating closing devices of the door lock, a door-side handle ( 4 ), the rigid rotation with the cylinder core ( 2 ) and the cam ( 3 ) is coupled to its actuation, a coaxial with the cylinder core ( 2 ) to the outside of the door directed rotatable rotary shaft which is rigid with a arranged on the outside of the door handle ( 6 ), a cylinder core arranged in the electromagnet ( 8th ), one within the cylinder housing ( 1 ) mounted clutch, which is a rotationally locked connection between the rotary shaft and the cylinder core ( 2 ) and can remove it, an access control 7 ) for verifying the access authorization of an accessing person, the access control electronics ( 7 ) performs a data exchange with an identifier of a person requesting access according to a defined access control protocol in order to verify the access authorization and wherein the access control electronics ( 7 ) in the door inner side handle ( 4 ) is arranged, and the solenoid is controlled so that the electromagnet, the outside door handle ( 6 ) for actuating the lock bar ( 3 ) with the cylinder core ( 2 ) couples. Lock cylinder according to claim 1, wherein the identifier contains a transponder and the data exchange with the access control electronics takes place wirelessly. Lock cylinder according to claim 2, wherein the data exchange takes place via an alternating B-field. Locking cylinder according to claim 1, wherein the coupling ( 9 ) includes two interlocking and disengageable interlocking elements, one of which with an anchor ( 13 ) one of the access control electronics ( 7 ) controlled electromagnet and is connected to a return spring. Lock cylinder according to one of claims 1 to 4, wherein the door inner side handle ( 4 ) a rotary knob and the outside door handle ( 6 ) a battery ( 11 ) containing rotary knob. Locking cylinder according to one of claims 1 to 5, wherein an antenna ( 14 ) together with the access control electronics ( 7 ) in the door inner side handle ( 4 ) is provided. Locking cylinder according to claim 6, wherein the antenna ( 14 ) is preferably a ferrite rod antenna. Lock cylinder according to one of claims 1 to 7, wherein in the cylinder core between the outside door handle ( 6 ) and cam ( 3 ) a drill protection ( 10 ) is arranged from hard material.

Images