EP0526904A1 - Locking cylinder, especially for a mortise lock - Google Patents

Abstract

What is indicated is a lock cylinder which has a cylinder housing (2), a lock-cylinder core (6) mounted in the cylinder housing (2) and an electromagnetic blocking device (15, 15a, 15b) securing the cylinder core (6) in its locked position against unauthorised rotation. The blocking device (15, 15a, 15b) comprises a blocking bolt (18, 18b) displaceable perpendicularly to the axis of the cylinder core (6), engaging into a recess (20, 20b) of the cylinder core (6) for securing the cylinder core (6) and moveable out of the cylinder-core recess (20, 20b) for releasing the cylinder core (6), an electromagnetic coil (23, 23b) and an armature (24, 24a, 24b) which is mounted in the cylinder housing (2) displaceably between a blocking position and a release position and is moveable by means of the coil (23, 23b) and which, in its blocking position, blocks the blocking bolt (18, 18b) and, in its release position, releases the blocking bolt (18, 18b). In one embodiment, during the rotation of the cylinder core (6) out of the locked position, the released blocking bolt (18, 18b) is shifted out of the cylinder-core recess by the cylinder core (6). In another embodiment of the invention, the blocking bolt (18) for securing the cylinder core (6) is shifted by the armature (24) when the latter is moved into the blocking position. The lock cylinder can be produced simply and cheaply and requires only a small number of parts. <IMAGE>

Description

The invention relates to a lock cylinder, in particular for mortise locks with a cylinder housing, a lock cylinder core, which is rotatably mounted in the cylinder housing about its axis and can be rotated by means of a key, and an electromagnetic locking device which secures the cylinder core in its closed position against unauthorized rotation and which can be displaced transversely to the axis of the cylinder core stored, for engaging to secure the cylinder core in a recess of the cylinder core and movable to release the cylinder core from the cylinder core recess movable locking pin, an electromagnetic coil controllable by means of an electrical control device and a slidably guided between a blocking position and a release position in the cylinder housing by means of the coil the direction of action of a return device has movable armature, which in its blocking position the locking pin with respect to the move out gens blocked from the cylinder core recess and releases the locking pin in its release position.

The invention further relates to a lock cylinder of the type mentioned above, in which a spring is provided which biases the locking pin in the direction away from the cylinder core and which, when released by the armature, moves the locking pin out of the cylinder core recess, the armature being one that removed from the cylinder core Free the end of the released locking bolt receiving space, which is defined in particular by a locking recess provided in the anchor.

A lock cylinder with the features listed above is known from the European patent application with the publication number 0 278 906. In this known locking cylinder, the electromagnetic locking device has a coil with a coil axis that runs essentially parallel to the cylinder core axis, an armature that is displaceably guided coaxially to the coil and that is pulled into the coil when the coil is activated, and one that is displaceable parallel to the locking bolt by means of a Has spring biased towards the cylinder core release bolt which engages with a driver shoulder on the locking pin and presses the latter into a groove provided on the cylinder core circumference to secure the cylinder core against unauthorized unlocking. As long as no suitable key is inserted into the locking cylinder, the release bolt engages with its end on the cylinder core side in a tumbler cutout of the cylinder core and presses a tumbler pin guided in this cylinder core recess in the direction of the cylinder core axis, the tumbler pin with its end facing away from the release bolt into a key channel Cylinder core protrudes. To unlock the locking cylinder core, the tumbler pin is moved into its mechanical unlocking position by a suitable key inserted into the key channel. He pushes the release bolt out of the guard locking recess. The locking pin, which is supported on the driver shoulder of the release pin, moves together with the release pin in the direction away from the cylinder core. It engages with its end remote from the cylinder core in a groove of the anchor in its blocking position. In this position, the locking pin has not completely left the cylinder core recess, so that the cylinder core is still secured. If an electronic coding of the key now matches the electronic coding of a control device controlling the coil and arranged in the cylinder housing, the latter activates the coil, which then pulls the armature from its blocking position into its release position. The locking pin slides out of the groove of the armature and engages under the force of a prestressing spring which biases it in the direction away from the cylinder core into a further groove, which is cut deeper than the first groove in the armature. In this position, the locking pin has completely left the cylinder core recess to release the cylinder core. If the key is pulled out of the key channel, the release bolt moves back into the guard locking recess under the force of its spring that prestresses it. With his drive shoulder, he lifts the locking pin out of the locking joint of the anchor and into the cylinder core recess. At the same time, the release bolt actuates a resilient return lever, which moves the armature back into its blocking position.

In addition to the electromagnetic locking device, the known locking cylinder has the usual mechanical tumblers which can be moved into its mechanical unlocking position by means of a key suitable for the lock.

A disadvantage of this known lock cylinder is that its electromagnetic locking device is comparatively complicated and contains numerous individual parts, the manufacture of which is complex and cost-intensive.

The invention has for its object to provide a lock cylinder of the type mentioned, which has a simple and cost-effective, built with few individual parts electromagnetic locking device.

This object is achieved in that in a locking cylinder according to the preamble of claim 1 a spring biasing the locking pin against the cylinder core is seen that the locking pin engages under the force of the spring in the cylinder core recess when the cylinder core is rotated into its closed position, and that after its release by the armature the locking bolt is displaced by the locking cylinder core and pushed out of the cylinder core recess when the locking cylinder core is out its closed position is unscrewed.

The electromagnetic blocking device implemented in this way requires only a few, comparatively simple and therefore cost-saving parts to manufacture and is of a very simple construction. In particular, it dispenses with separate trigger mechanisms controlled by tumbler pins, as are known from the prior art.

The coil can in particular be arranged in a housing web of the cylinder core housing in such a way that its coil axis runs essentially parallel to the cylinder core axis. The armature is preferably a bolt which is mounted coaxially to the coil and, in its blocking position, penetrates into the displacement path of the locking bolt in order to prevent the latter from moving out of the cylinder core recess. To release the locking bolt, the anchor can be moved out of the displacement path of the locking bolt. There are various options for realizing the release position and the blocking position of the anchor. For example, to realize the blocking position of the armature when the coil is not activated by means of a spring in the direction away from the coil in the displacement path of the locking bolt. By activating the coil, the armature is then pulled out of the displacement path of the locking bolt against the force of the spring in order to reach the release position. With such a configuration, the coil would therefore have to be supplied with current in order to release the locking bolt.

Another way of realizing the release or blocking of the locking pin by means of the armature is, for example, that the armature is provided with a recess into which the locking pin can move as it moves out of the cylinder core. The anchor would have to be positioned in its release position so that its recess is aligned with the locking bolt. In the blocking position, the anchor would have to be positioned so that its recess is offset from the locking pin. With such a configuration, the armature can also be in the blocking position in its state attracted by the coil and can be moved into the release position by means of a return spring when the coil current is switched off.

The cylinder core recess is preferably a countersink, in particular a 90 ° countersink, from the inclined surface of which the locking bolt is displaced when the cylinder core is rotated without the risk of jamming when the cylinder core is rotated out of its closed position. The lowering has the particular advantage that it can be produced in a simple manner with a countersink. As an additional measure to simplify the movement of the locking pin out of the cylinder core recess, it is proposed to round off the end of the locking bolt which engages in the cylinder core recess, in particular in a hemispherical manner.

To solve the problem it is also proposed to design a locking cylinder according to the preamble of claim 3 so that the locking pin is displaced by the armature while moving out of the vacated space in the cylinder core recess when the anchor is moved to secure the locking cylinder core in its blocking position.

This lock cylinder according to the invention also has a magnetic locking device which is constructed in a special manner simply from a few inexpensive parts.

As has been mentioned, the armature can in particular be guided so as to be displaceable parallel to the cylinder core axis. In this case, the armature is preferably provided with a latching recess which receives the end of the released locking bolt which is distant from the cylinder core and defines the vacated space and in which the released locking bolt is supported on the armature. When the armature moves into the blocking position, the locking bolt is displaced from an inclined surface of the latching recess and pressed into the cylinder core recess. Even in the blocking position of the anchor, the locking bolt is always supported on the anchor.

The latching cutout is preferably an annular groove with bevelled groove walls that runs tangentially around the armature.

The armature can in particular have a further annular groove with beveled groove walls, which receives the end of the locking bolt remote from the cylinder core when the armature is moved into its blocking position.

As already mentioned with reference to the locking cylinder according to the invention described first, the restoring device which prestresses the armature can either be a spring which prestresses the armature into its blocking position or a spring which prestresses the armature into its release position.

In one embodiment of the invention, permanent magnets are arranged at the opposite ends of the displacement path of the armature, which exert an attractive force on the armature, which holds the armature in its respective end position, the armature using the coil between its end positions can be moved back and forth electromagnetically in order to bring it from the blocking position into the release position or from the release position into the blocking position when the locking cylinder is in its closing position.

In this embodiment, there is no need for a mechanical spring that prestresses the armature. A particular advantage of this solution is that only a short-term current pulse of appropriate polarity is to be fed to the coil in order to move the armature from one end position to the other end position.

The invention further relates to a lock cylinder with a cylinder housing, a lock cylinder core rotatably mounted in the cylinder housing about its axis, rotatable by means of a key, and an electromagnetic locking device securing the cylinder core in its closed position against unauthorized rotation, which has a coil arranged in the cylinder housing with transverse to the cylinder core axis extending coil axis and a coaxial to the coil in the cylinder housing slidably guided locking bolt which can be positioned to secure the cylinder core in a locking position in which it engages in a recess in the cylinder core. The last-mentioned locking cylinder is characterized according to the invention in that the coil has a fixed coil core that limits the end of the displacement path of the locking pin on the coil side, that the locking pin has a permanent magnetic area at its end facing the coil core and that the coil can be activated in such a way that it can be activated with magnetically interacts with the permanent magnetic area in order to exert a magnetic force positioning the locking pin on the locking pin.

This embodiment of the invention is also characterized in that it can be produced using simple and inexpensive means. To insert the locking pin into the cylinder core recess, it is sufficient to switch on the coil current with the appropriate polarity, so that a repulsive magnetic force acts on the locking pin, which moves the locking pin towards the cylinder core and finally holds it in the position in which the locking pin secures the cylinder core . Moving the locking bolt out of the cylinder core recess can be effected, for example, by switching off the coil current and sliding the locking bolt out of the cylinder core recess under the effect of gravity. However, there is also the possibility of generating a magnetic force attracting the locking pin by reversing the polarity of the coil magnetic field in order to move the locking pin out of the cylinder core recess.

According to a preferred embodiment of a locking cylinder according to the invention, the key carries interchangeable electrical and / or magnetic locking authorization information which can be checked by the control device and which identify it as suitable for the locking cylinder between the key and the locking cylinder. When the suitable key is recognized, the control device switches the coil current in such a way that the armature or the locking bolt is moved into its position releasing the cylinder core.

The key can, for example, be designed such that it has an electronic circuit, in particular programmable, that stores the locking authorization information in its key handle. The locking authorization information is read in the locking cylinder by a corresponding reading device of the control device. The control device can be arranged in whole or in part in the lock cylinder housing.

In an alternative embodiment, the electromagnetic blocking device can be controlled remotely. Such a solution is suitable for a locking system to be controlled by a locking center with a plurality of locking cylinders according to the invention. From the locking center, the coil current can be controlled by means of a corresponding control device, so that the cylinder core can either be secured or unlocked and, in its secured state, cannot be rotated out of its closed position even with a key that mechanically matches the locking cylinder.

The locking cylinders according to the invention are preferably also secured in a known manner against unauthorized rotation by mechanical tumblers, the key having mechanical codings for actuating the tumblers.

The additional mechanical tumblers increase the security of the locking cylinder from being broken open.

According to a development of the invention, the electromagnetic blocking device is arranged in an installation housing that can be inserted into the cylinder housing.

With a locking cylinder with mechanical tumblers, this solution has the advantage that it can be used without any problems even without an electromagnetic locking device and can be provided with the electromagnetic locking device in a simple manner if required. Furthermore, the solution mentioned enables the electromagnetic blocking device to be replaced easily.

The invention also provides one Locking cylinder, in particular for mortise locks, with a cylinder housing, a locking cylinder core which is rotatably mounted in the cylinder housing about its axis and can be rotated by means of a key, and an electromagnetic locking device which secures the cylinder core in a closed position against unauthorized rotation and which is mounted transversely to the axis of the cylinder core Securing of the cylinder core in a recess of the cylinder core engaging and movable to release the cylinder core from the cylinder core recess locking member, an electromagnetic coil controllable by means of an electrical control device and an armature guided between a blocking position and a release position in the cylinder housing, which has the blocking member in its blocking position holds in the cylinder core recess and in its release position allows the locking member to be moved out of the cylinder core recess. This lock cylinder is characterized in that the armature is fixed both in the blocking position and in the release position by permanent magnets and current pulses can be supplied to the coil for switching the position of the armature.

The invention is explained in more detail below on the basis of exemplary embodiments.

• Fig. 1: ein erstes Ausführungsbeispiel der Erfindung in einer Teilschnittseitenansicht, bei dem der Schließzylinderkern in seiner gegen unbefugtes Verdrehen gesicherten Schließstellung dargestellt ist,
• Fig. 2: eine Querschnittansicht des Schließzylinders nach Fig. 1 mit der in Fig. 1 durch 11 gekennzeichneten Schnittebene,
• Fig. 3: das in Fig. 1 gezeigte Ausführungsbeispiel, wobei der Schließzylinderkern aus seiner Schließstellung herausgedreht ist,
• Fig. 4: eine Querschnittdarstellung des Ausführungsbeispiels gemäß Fig. 1-3, mit der in Fig. 3 mit IV gekennzeichneten Schnittebene,
• Fig. 5: ein zweites Ausführungsbeispiel in einer Teilschnittseitenansicht mit einem in seiner Schließstellung verriegelten Zylinderkern,
• Fig. 6: eine Querschnittdarstellung des Schließzylinders nach Fig. 5 mit der durch VI in Fig. 5 gekennzeichneten Schnittebene,
• Fig. 7: das Ausführungsbeispiel nach Fig. 5 in einer Teilschnittseitenansicht, wobei der Schließzylinderkern aus seiner Schließstellung herausgedreht ist,
• Fig. 8: eine Querschnittdarstellung des Schließzylinders gemäß den Fig. 5-7 mit der in Fig. 7 mit VIII gekennzeichneten Schnittebene,
• Fig. 9: ein drittes Ausführungsbeispiel der Erfindung in einer Teilschnittseitenansicht, wobei der Schließzylinderkern in seiner Schließstellung gesichert ist,
• Fig. 10: eine Querschnittsansicht des Ausführungsbeispiels nach Fig. 9 mit der in Fig. 9 mit X gekennzeichneten Schnittebene,
• Fig. 11: das Ausführungsbeispiel nach Fig. 9 und 10, wobei die Verriegelung des Schließzylinderkerns durch die elektomagnetische Sperreinrichtung aufgehoben ist,
• Fig. 12: eine Querschnittsdarstellung des Ausführungsbeispiels gemäß Fig. 9-11, mit der in Fig. 11 mit XII gekennzeichneten Schnittebene,
• Fig. 13: eine Teilschnittseitenansicht eines vierten Ausführungsbeispiels der Erfindung mit einem in seiner Schließstellung gesicherten Schließzylinderkern,
• Fig. 14: eine Querschnittsdarstellung des Schließzylinders nach Fig. 13 mit der in Fig. 13 mit XIV gekennzeichneten Schnittebene,
• Fig. 15: das vierte Ausführungsbeispiel in der Ansicht gemäß Fig. 13, wobei der Schließzylinderkern von der elektromagnetischen Sperreinrichtung freigegeben ist, und
• Fig. 16: eine Querschnittsdarstellung des Ausführungsbeispiels gemäß Fig. 13-15 mit der in Fig. 15 mit XVI gekennzeichneten Schnittebene.
• Fig. 17: eine Detailschnittansicht einer elektromagnetischen Sperreinrichtung, bei der das Sperrorgan durch Permanentmagnete in seinen Endstellungen fixiert wird. In der nachfolgenden Beschreibung und in den Figuren sind gleiche oder gleichwirkende Teile mit den gleichen Bezugsziffern gekennzeichnet.

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• 1: a first embodiment of the invention in a partial sectional side view, in which the lock cylinder core is shown in its closed position secured against unauthorized rotation,
• 2: a cross-sectional view of the lock cylinder according to FIG. 1 with the sectional plane identified by 11 in FIG. 1,
• 3: the embodiment shown in Fig. 1, wherein the lock cylinder core is rotated out of its closed position,
• 4: a cross-sectional illustration of the exemplary embodiment according to FIGS. 1-3, with the sectional plane identified by IV in FIG. 3,
• 5: a second embodiment in a partial sectional side view with a cylinder core locked in its closed position,
• 6 shows a cross-sectional illustration of the locking cylinder according to FIG. 5 with the sectional plane identified by VI in FIG. 5, FIG.
• 7: the exemplary embodiment according to FIG. 5 in a partial sectional side view, the locking cylinder core being rotated out of its closed position,
• 8: a cross-sectional representation of the locking cylinder according to FIGS. 5-7 with the sectional plane identified by VIII in FIG. 7,
• 9: a third exemplary embodiment of the invention in a partial sectional side view, the locking cylinder core being secured in its closed position,
• 10: a cross-sectional view of the exemplary embodiment according to FIG. 9 with the sectional plane identified by X in FIG. 9,
• 11: the embodiment of FIGS. 9 and 10, wherein the locking of the lock cylinder core is released by the electromagnetic locking device,
• 12: a cross-sectional representation of the exemplary embodiment according to FIGS. 9-11, with the sectional plane identified by XII in FIG. 11,
• 13: a partial sectional side view of a fourth exemplary embodiment of the invention with a locking cylinder core secured in its closed position,
• 14: a cross-sectional view of the locking cylinder according to FIG. 13 with the section plane marked XIV in FIG. 13,
• FIG. 15: the fourth exemplary embodiment in the view according to FIG. 13, the locking cylinder core being released by the electromagnetic locking device, and
• FIG. 16: a cross-sectional illustration of the exemplary embodiment according to FIGS. 13-15 with the sectional plane identified by XVI in FIG. 15.
• 17: a detailed sectional view of an electromagnetic locking device in which the locking member is fixed in its end positions by permanent magnets. In the following description and in the figures, identical or equivalent parts are identified by the same reference numbers.

1-4, a double-profile locking cylinder 1 is shown as the first embodiment of the invention, which is particularly intended for mortise locks. The locking cylinder has a cylinder housing 2, which consists of two ring-cylindrical parts 3, 3 'and a flat web 3 "connecting the ring-cylindrical parts to one another.

The ring-cylindrical parts close between a locking bar recess 4 in which a locking bar 5 is received. A lock cylinder core 6 is rotatably supported in the ring-cylindrical housing parts 3, 3 '. 1 and 2, one of the lock cylinder cores is shown secured in its closed position against unauthorized rotation. In order to secure the lock cylinder core, mechanical pin tumblers 7 are provided in the usual way, each consisting of at least one core pin 8, a housing pin 9 and a tumbler spring 10. As long as the lock cylinder core 6 is in the closed position shown in FIG. 1, a bearing bore 11 is aligned coaxially with a bearing bore 12. The core pin 8 is axially displaceably mounted in the bearing bore 11 and the housing pin 9 is axially displaceably mounted in the bearing bore 12. As long as no key is inserted into the key channel of the cylinder core 6 identified by 13, the pins 8, 9 are prestressed in this locking position securing the cylinder core by means of the tumbler spring 10. By means of a key 14 to be inserted into the key channel 13 with mechanical codings corresponding to the tumblers 7, the tumbler pins can be displaced against the force of the tumbler spring to such an extent that they no longer block the cylinder core 6 in its closed position.

In addition to the mechanical pin tumblers, an electromagnetic locking device 15 which secures the locking cylinder core 6 in its closed position is provided. The electromagnetic locking device 15 has a locking bolt 18, which is guided axially displaceably and is essentially displaceable axially displaceably to the axis 16 of the cylinder core 6 in a bearing bore 17 "provided in the housing web 3" and engages with its end 19 adjacent to the cylinder core 6 in a recess 20 in the cylinder core 6. 1 and 2 when the cylinder core 6 is in its closed position, the locking pin 18 is biased towards the cylinder core 6 by a spring 21 arranged in an enlarged part of the bearing bore 17. The electromagnetic blocking device 15 comprises furthermore an electromagnetic coil 23 arranged in the housing web 3 "according to FIG. 1 below the mechanical pin tumblers 7, the coil axis of which runs essentially parallel to the cylinder core axis 16 and a coil armature 24 which is between a blocking position shown in FIG. 1 and a blocking position in FIG. 3 Shown release position coaxial to the coil 23 is also led. One end 26 of the armature 24 is supported in the core bore 25 of the coil. The other end 27 of the armature 24, which is remote from the coil 23, is mounted in a guide bore 28 provided in the housing web 3 ″. In the region of the end 27 which is remote from the coil 23, the armature 24 is flattened on its side 29 facing the cylinder core 6 a recess 30 is provided in the area of the end 27 of the armature 23, which serves to receive the end 22 of the locking bolt, which extends into the guide bore 28 of the armature 23 and is remote from the cylinder core 6, as shown in FIG. 3, when the Armature 24 is in its release position and the locking pin 18 is moved out of the cylinder core recess 20.

In the state of the lock cylinder 1 according to the invention shown in FIG. 1, the coil current is switched on, so that the coil 23 supports the armature 24 against the force of one which is supported on the one hand on the coil and on the other hand on a shoulder 32 of the armature 24 in one between the coil 23 and the guide bore 28 extending extended bore 33 received compression spring 34 or return spring so far into itself that the end 26 of the armature 24 near the coil comes into contact with a stop 35. The recess 30 in the armature 24 held in this way in its blocking position by the coil 23 is offset with respect to the locking pin 18 and the outermost region 36 of the end of the armature 24 remote from the coil is at the end remote from the cylinder core 6 22 of the locking pin 18 is guided into the displacement path of the locking pin 18, so that the locking pin 18 is blocked and cannot be moved out of the cylinder core recess 20. The cylinder core 6 is secured against unauthorized rotation in this way.

To unlock the cylinder core 6, a suitable key 14 is to be inserted into the key channel 13, which moves the mechanical pin tumblers 7 into their unlocked position. Furthermore, the coil current is to be switched off in the manner still to be described, so that the coil 23 releases the armature 24 and the latter is moved into its release position according to FIG. 3 under the force of the return spring 34. The cylinder core 6 is now unlocked and can be rotated by means of the key 14, so that the lock bit 5 coupled to the cylinder core 6 via a conventional coupling can be pivoted accordingly.

When the cylinder core 6 rotates, the locking pin 18 is displaced by the cylinder core 6 against the force of the spring 21, so that the locking pin 18 comes out of the cylinder core recess 20 and, with its end 22 remote from the cylinder core 6, dodges into the recess 30 of the armature. Thereafter, the locking pin 18 is supported under the force of the spring 21 on the circumference of the cylinder core.

The displacement of the locking pin 18 from the cylinder core recess 20 is made possible by the fact that the cylinder core recess 20 becomes wider with increasing radial distance from the cylinder core axis and therefore has inclined surfaces 37, along which the cylinder core end 19 of the locking bolt 18 can slide out of the cylinder core recess 20 if the Cylinder core 6 is rotated. In the special case shown in FIGS. 1-4, the cylinder core recess 20 is a 90 ° depression. The end 19 of the locking pin 18 engaging in the cylinder core recess 20 is rounded in a hemispherical manner in order to additionally facilitate the displacement of the locking pin 18.

If the cylinder core 6 is rotated back into its closed position by means of the key 14, then the locking bolt 18 prestressed by the spring 21 automatically engages again in the cylinder core recess 20. To block the locking bolt 18 in this position, the coil current must be switched on, so that the coil armature 24 is attracted by the coil 23 and brought into the blocking position shown in FIGS. 1 and 2.

Lines 38 are provided for supplying power to the coil 23. The lines 38 are to be connected to a control device, not shown, for switching the coil current on and off.

The coil current can be controlled in various ways. For example, a key code checking device known per se can be connected to the locking cylinder 1, which checks the electrical and / or magnetic locking authorization codes of the key 14 when the latter is inserted into the key channel 13. If the key code checking device recognizes the key 14 as suitable for the locking cylinder 1, it switches the coil current - i.e. in the present case - so that the armature 24 comes into its release position.

The key code information can be stored, for example, in a circuit to be accommodated in the key handle 39.

The key code test device or control device controlling the coil current does not necessarily have to be completely accommodated in the cylinder housing 2. It can also be installed outside of the cylinder housing 2, except for its part reading the key code.

Remote control of the electromagnetic locking device 15 is also possible. The coil current is to be controlled, for example, from a locking center remote from the locking cylinder 1. In this case it is proposed to provide a device which checks whether the cylinder core 6 is in its closed position so that the coil current can be prevented from being switched on when the cylinder core 6 is turned out of its closed position. This would prevent the locking pin 18 and the armature 24 from jamming in their release positions.

It is to be added that the element marked with 40 is an anti-rotation device for the armature 24 and the element designated with 41 represents a stop for the locking bolt 18, which is fastened to the cylinder housing web 3 "between two shoulders 42 of the locking bolt 18. This together with the shoulders 42 is a stop Limit stop of the locking pin 18 causing stop stop serves to facilitate the assembly of the cylinder core.

A second exemplary embodiment of the invention is described below with reference to FIGS. 5-8. The description is limited to the deviations from the first embodiment.

In contrast to the first exemplary embodiment, the end region 27a of the armature 24a removed from the coil 23 does not have a recess which receives the locking pin 18. The release of the locking pin 18 is effected in that the armature 24a is pulled completely out of the displacement path of the locking pin 18, as shown in FIG. 7. The blocking bolt 18 is locked in its engagement position with the cylinder core 6 accordingly in that the end region 27a of the armature 24a removed from the coil 23 is guided into the displacement path of the locking bolt 18, as shown in FIG. 5. According to FIG. 5, the armature 24a is pressed into its blocking position by the compression spring 34 when the coil current 23 is switched off and the armature 24a is therefore not attracted to the coil 23.

7, the armature 24a is in its release position when it is attracted by the coil 23 when the coil current is switched on.

A third exemplary embodiment of the invention will be described below with reference to FIGS. 9-12, the description being limited to differences from the first two exemplary embodiments.

The locking pin 18b is biased towards the armature 24b by means of a biasing spring 21b and is supported on the armature 24b by its end 22b remote from the cylinder core 6. The end 19b of the locking bolt 18b which is adjacent to the cylinder core is cylindrical in shape and engages in a blind bore 20b in the circumference of the cylinder core 6 to secure the cylinder core 6, as can be seen from FIGS. 9 and 10. The armature 24b is rotationally symmetrical with respect to its axis and has at its end 27b remote from the coil 23b two ring grooves 30b, 36b cut into the armature 24b at different depths for receiving the end 22b of the locking bolt 18b remote from the cylinder core 6.

The position of the armature 24b shown in FIG. 9, in which the armature 24b is drawn into the coil 23b up to the stop 35b, is the blocking position of the armature 24b.

In this position, the end 22b of the locking pin 18b engages in the less deeply cut annular groove 36b, the locking pin 18b engaging with its end 19b to secure the cylinder core 6 against unauthorized rotation in the recess 20b designed as a blind bore and by the armature 24b in this engagement position is blocked. 11 and 12, the armature 24b is shown in its other end position, which corresponds to the release position. In this position, the end 22b of the locking bolt 18b remote from the cylinder core 6 snaps into the deeper-cut annular groove 30b. The annular groove 30b is cut so deep into the armature 24b that the locking pin 18b comes out of the blind bore 20b of the cylinder core 6 and therefore releases the cylinder core 6.

If the armature 24b is shifted from the release position shown in FIG. 11 to the blocking position shown in FIG. 9 when the cylinder core 6 is rotated in the closed position, it displaces the locking pin 18b from the deeper-cut annular groove 30b. The end 19b of the locking pin 18b is moved into the blind bore 20b of the cylinder core 6. The displacement of the locking pin 18b is made possible by the fact that the annular grooves 30b, 36b widen with increasing distance from the anchor axis 43b, so that they have inclined surfaces 37b, along which the end 22b of the locking pin 18b without the risk of jamming out of the respective annular groove 30b or 36b can slide out. The displacement of the locking pin 18b is additionally facilitated in that the end 22b remote from the cylinder core is shaped conically or hemispherically.

Although the drive of the armature 24b could also be implemented in the manner already provided for in the first two exemplary embodiments, another solution is implemented in the exemplary embodiment shown in FIGS. 9-12.

Permanent magnet plates 35b and 44b are provided as stop stops at the two ends of the displacement path of the armature 24b. The permanent magnet plates 35b, 44b exert an attractive force on the armature 24b and hold it in the respective end position in which it is currently located.

The armature 24b is moved out of the end position shown in FIG. 9, which represents the blocking position, when the coil 23b receives a brief current pulse, so that the armature 24b is magnetized in such a way that it is released from the magnetic plate 35b and is thereby accelerated that it reaches the end position shown in Fig. 11, in which it is held by the magnetic plate 44b. The locking pin 18b slides from the less deeply cut ring groove 36b into the deeper cut ring groove 30b. The locking pin 18b also has play in the blocking position, so that it can be raised during the transition from one to the other annular groove.

In order to move the armature from the release position according to FIG. 11 into the blocking position according to FIG. 9, a short current pulse must be applied to the coil again.

A mechanical return spring corresponding to spring 34 in FIG. 1 is not required in the exemplary embodiment of the invention described above. In this case, the coil, together with the magnetic plates 35b and 44b, takes over the task of returning the armature 24b to the respective end position or of holding it in the end position.

In the exemplary embodiment according to FIGS. 9-12, in particular large transverse forces can be absorbed by the locking bolt 18b when an attempt is made to rotate the cylinder core 6 by force. A particular advantage of this exemplary embodiment is that the coil does not require continuous current in any of the positions of the armature 24b.

The coil current can be controlled in the manner already described by means of a key code checking device or a remote control.

13-16 shows a fourth embodiment of the invention.

In the fourth exemplary embodiment, the coil 23c according to FIGS. 13-16 is arranged below the locking pin 18c coaxially to the locking pin 18c in the housing web 3 ". The coil has a fixed coil core 45c which forms a stop for the locking pin 18c when the latter is brought into its position releasing the cylinder core 6. A permanent magnet plate 47c is attached to the end 22c of the locking bolt 18c remote from the cylinder core 6.

To secure the cylinder core 6, the locking pin 18c can be moved into the locking position shown in FIGS. 13 and 14, in which it engages in a blind bore 20c of the cylinder core 6. The locking bolt 18c is moved magnetically into the locking position. For this purpose, the coil 23c is supplied with current so that it interacts magnetically with the permanent magnet plate 47c with the formation of a repulsive magnetic force. The magnetic force shifts the locking pin 18c and finally fixes it in its Locked position. To release the cylinder core 6, the coil current must either be switched off or reversed. In the first case, the locking pin 18c slides out of the cylinder core bore 20c under the action of gravity. In the second case it is supported by the magnetic force, which is now attracting. In the exemplary embodiment described above, the coil 23c with its coil core 45c and the locking bolt 18c are accommodated in a separate plug-in housing 48c, which is inserted into an opening provided in the housing web 3 ". This solution allows an uncomplicated exchange of the electromagnetic locking device. Furthermore, the lock cylinder 15c, which is functional even without the electromagnetic locking device 15c, can be retrofitted.

17 shows a blocking device 15d of a further exemplary embodiment in a partial partial sectional illustration.

In this locking device 15d, a coil 23d is provided with a coil axis running transversely to the cylinder core axis 16. The locking bolt 18d, which is displaceable coaxially to the coil 23d in the housing web 3 ", forms the coil armature and engages with its end 19d on the cylinder core side in a cylinder core recess 20d in order to secure the cylinder core 6 against unauthorized rotation. In the direction of the displacement path of the armature or locking bolt 18d permanent magnets 35d, 44d are arranged at a distance from one another on the cylinder housing, the coil 23d being closer to one of the permanent magnets 35d than the other permanent magnet 44d. The permanent magnets 35d, 44d face each other with the same magnetic polarities in the direction of the displacement path of the locking bolt 18d The armature or locking bolt 18d has pole faces opposite the permanent magnets 35d, 44d, and the pole face of the locking bolt 18d facing the permanent magnet 35d close to the coil forms its lower end face as shown in Fig. 17. The pole face of the coil opposite the ring-shaped permanent magnet 44d Erbbolzens 18d is the surface 50 facing the cylinder core of an annular shoulder 51 d of the locking bolt 18d. In order to switch the position of the armature or locking pin 18d, current pulses are to be supplied to the coil 23d. The locking pin 18d is thus held by the permanent magnet 44d in the blocking position shown in FIG. 17, from which it can be guided out electromagnetically by means of the coil 23d. In the release position, in which it is pulled out of the cylinder core recess 25d, it is held by the permanent magnet 35d. The control of the coil current can also be implemented in the manner described in the embodiment described last.

Claims (20)

1. Locking cylinder, in particular for mortise locks, with a cylinder housing (2), a locking cylinder core (6) which is rotatably mounted about its axis in the cylinder housing (2) and can be rotated by means of a key (14) and one against the cylinder core (6) in a closed position electromagnetic locking device (15, 15a, 15b) which prevents unauthorized rotation and engages in a recess (20, 20b) in the recess (20, 20b) of the cylinder core (6), which is slidably mounted transversely to the axis of the cylinder core (6), and releases it of the cylinder core (6) from the cylinder core recess (20, 20b) movable locking bolts (18, 18b), an electromagnetic coil (23; 23b) controllable by means of an electrical control device and a slidably guided between a blocking position and a release position in the cylinder housing (2) , by means of the coil (23; 23b) opposite to the direction of action of a reset device (34; 23b, 35b, 4 4b) movable armature (24; 24a; 24b) which, in its blocking position, blocks the locking bolt (18; 18b) to prevent it from moving out of the cylinder core recess (20; 20b) and in its release position blocks the locking bolt (18; 18b) to move it out of the cylinder core recess (20; 20b) releases, characterized in that a spring (21) is provided which biases the locking pin (18) constantly towards the cylinder core (6), that the locking pin (18) engages in the cylinder core recess (20) under the force of the spring (21), when the cylinder core (6) is rotated into its closed position and that after its release by the armature (24; 24a) the locking pin (18) is displaced from the cylinder core (6) against the force of the spring (21) and out of the cylinder core recess ( 20) is pushed out when the cylinder core (6) is turned out of its closed position. 2. Lock cylinder according to claim 1, characterized in that the cylinder core recess (20) is a reduction, in particular 90 "reduction, and that the recess (20) engaging end (19) of the locking bolt (18) is rounded in particular hemispherical. 3. Lock cylinder according to the preamble of claim 1, wherein a spring (21 b) is provided which biases the locking bolt (18b) in the direction away from the cylinder core (6) and which lock bolt (18b) when released by the armature (24b) moved out of the cylinder core recess (20b), the armature (24b) clearing a space which receives the end (22b) of the locking bolt (18b) remote from the cylinder core (6), characterized in that the locking bolt (18b) is removed from the armature (24b) is displaced into the cylinder core recess (20b) when the armature (24b) is moved into its blocking position to secure the cylinder core (6). 4. Lock cylinder according to claim 3, wherein the armature (24b) is guided substantially parallel to the axis (16) of the cylinder core (6) in the cylinder housing (2) and one of the cylinder core (6) removed end of the released locking bolt (18b ) receiving catch recess (30b), in which the released locking bolt (18b) is supported on the armature (24b), characterized in that the locking bolt (18b) is supported on the armature (24b) at all times. 5. Lock cylinder according to claim 4, characterized in that the latching recess (20b) is an annular groove which becomes wider with increasing radial distance from the axis (27b) of the armature (24b). 6. Lock cylinder according to claim 5, characterized in that the armature (24b) has a further annular groove (36b) with beveled groove walls which receives the end (22b) of the locking bolt which is removed from the cylinder core (6) when the armature (24b) is in its blocking position is moved. 7. Locking cylinder according to one of claims 3 to 6, characterized in that the end (22b) of the locking bolt (18b) removed from the cylinder core (6) is rounded in particular in a hemispherical manner. 8. Lock cylinder according to one of the preceding claims, characterized in that the return device comprises a return spring (34). 9. Lock cylinder according to one of the preceding claims, characterized in that permanent magnets (35b and 44b) are arranged at the opposite ends of the displacement path of the armature (24b), which hold the armature (24b) in its respective end position attractive force on the armature (24b) and that the armature (24b) can be moved electromagnetically back and forth between its end positions by means of the coil (23b) in order to transfer it from the blocking position into the release position or from the release position into the blocking position if the Cylinder core (6) is in its closed position. 10. Locking cylinder, in particular for mortise locks, with a cylinder housing (2), a locking cylinder core (6) rotatably mounted in the cylinder housing (2) and rotatable by means of a key, and an electromagnetic locking device securing the cylinder core (6) in a closed position against unauthorized rotation ( 15c) which has a coil (23c) arranged in the cylinder housing (2) with a coil axis running transversely to the cylinder core axis (16) and a locking bolt which is guided coaxially to the coil (23c) in the cylinder housing (2) and which secures the cylinder core (6) can be positioned in a blocking position, in which it engages in a recess (20c) in the cylinder core (6), characterized in that the coil (23c) has a fixed coil core (45c) which detects that of the cylinder core (6) distal end of the displacement path of the locking pin (18c) limits that the locking pin (18c) at its end facing the coil core (45c) NEN permanent magnetic area (47c) and that the coil (23c) can be activated such that it interacts magnetically with the permanent magnetic area (47c) to exert a magnetic force positioning the locking pin (18c) on the locking pin (18c). 11. Locking cylinder, in particular for mortise locks, with a cylinder housing (2), a cylinder core (6) rotatably mounted about its axis in the cylinder housing (2), and a cylinder core (6) rotatable by means of a key, and one that locks the cylinder core (6) in a closed position against unauthorized rotation Electromagnetic locking device (15d) which has a slidably mounted transverse to the axis of the cylinder core (6), which engages in a recess (20d) of the cylinder core (6) to secure the cylinder core (6) and to release the cylinder core (6) from the cylinder core recess ( 20d) movable locking member (18d), an electromagnetic coil (23d) controllable by means of an electrical control device and one between egg ner blocking position and a release position in the cylinder housing (2) displaceably guided armature (24d), which holds the blocking member (18d) in the cylinder core recess (20d) in its blocking position and in its release position moving the blocking member (18d) out of the cylinder core recess ( 20d), characterized in that the armature is fixed both in the blocking position and in the release position by permanent magnets (35d, 44d) and current pulses can be supplied to the coil (23d) for switching the position of the armature (24d). 12. Lock cylinder according to claim 11, characterized in that the permanent magnets (35d, 44d) in the direction of the displacement of the armature (24d) are arranged at a distance from each other, that the armature (24d) opposite the permanent magnets (35d, 44d) pole faces (50d ) and that the coil (23d) is closer to one of the permanent magnets (35d) than the other (44d). 13. Lock cylinder according to claim 12, characterized in that the permanent magnets (35d, 44d) face each other with the same polarities in the direction of the displacement path. 14. Lock cylinder according to one of the preceding claims, characterized in that the key (14) between the key (14) and the lock cylinder (1) interchangeable, to be checked by the control device electrical and / or magnetic locking authorization information, which it as to Identify the lock cylinder (1) appropriately, and that the control device, upon detection of the appropriate key (14), switches the coil current in such a way that the armature (24; 24b) or the locking bolt (18c) is in its position releasing the cylinder core (6) is moved. 15. Lock cylinder according to one of the preceding claims, characterized in that the electromagnetic locking device (15; 15a; 15b; 15c) is remotely controllable. 16. Lock cylinder according to one of the preceding claims, characterized in that the lock cylinder core (6) is also secured by mechanical tumblers (7) against unauthorized rotation, which can be moved into a position releasing the cylinder core (6) by means of the key (14). 17. Locking cylinder according to one of the preceding claims, characterized in that the electromagnetic locking device (15c) has a built-in housing (48c) detachably installed in the cylinder core housing. 18. Electromagnetic locking device according to one of the preceding claims, for installation in a lock cylinder, which has a cylinder housing (2), one in the cylinder housing (2) rotatably mounted, by means of a key (14) rotatable lock cylinder core (6) and recesses for receiving the electromagnetic Has locking device (15; 15a; 15b; 15c). 19. Lock cylinder according to at least one of claims 1, 2, 15, 16, 17 and 18, characterized in that the armature (24; 24a) is guided in a substantially parallel to the axis of the cylinder core (6) in the cylinder housing (2) Rod and has a recess, in particular an annular groove, which receives the end of the released locking bolt (18) that is removed from the cylinder core (6). 20. Lock cylinder according to at least one of claims 1, 2, 15, 16, 17, 18 and 19, characterized in that the return device (34) comprises a return spring which biases the armature (24; 24a) towards its blocking position.

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