EP1636454B1 - Electromechanical lock cylinder - Google Patents

Abstract

The invention concerns an electromechanical lock cylinder that cooperates with evaluation electronics to recognize access authorization and has a housing that includes two opposite cylindrical receptacles, in which a lock core, which can be operated by a key, or a knob shaft, which is connected to rotate in unison with a know, are mounted to rotation, in which the lock core and/or knob shaft cooperate with a lock tab, which operates, in particular, a bolt or latch with a door lock, and, with a fitting key or access authorization, an electromechanically driven blocking or coupling element is moved from the rest position to an operating position and produces a splined connection between the key or knob and the lock tab, characterized by the fact that the lock tab is freely rotatable relative to the two lock cores or the two knob shafts in the rest position of the blocking or coupling element.

Description

The invention relates to an electromechanical lock cylinder, which can cooperate with an evaluation for detecting an access authorization and having a housing which comprises two opposing cylindrical receptacles in which either a respective lock core, which is actuated by a key, or in each case a knob shaft, the rotatably connected to a knob, are rotatably supported, wherein the lock cores or the knob shafts interact with a locking lug, which can in particular actuate a latch or a latch of a door lock, and with matching key or access authorization an electromechanically driven locking or coupling element of the Resting position is moved into an operative position and generates a rotationally fixed connection between the key or knob and the locking lug, while the locking lug od in the rest position of the locking or coupling element relative to both locking cores it is freely rotatable to both Knaufwellen.

Alternatively, the lock cylinder may comprise a housing comprising two opposed cylindrical receptacles in which on one side of the housing a lock core which is actuated by a key, and on the opposite side a knob shaft which is rotatably connected to a knob, are rotatably mounted. It is also possible that the lock cylinder has a housing which comprises a cylindrical receptacle in which either a lock core, which can be actuated by a key, or a knob shaft, which is rotatably connected to a knob, is rotatably mounted, wherein the lock core or the knob shaft cooperate with a locking lug.

The invention thus relates firstly to two-sided lock cylinder with two opposing receptacles in which either a lock core on either side or both sides a knob shaft or in which on one side a knob shaft and on the other side a lock core are stored. On the other hand, the invention relates to one-sided lock cylinder, so-called half cylinder, with only one receptacle in which either a lock core or a knob shaft is rotatably mounted.

In electromechanical lock cylinders that can be actuated with a key, in addition to a frequently still mechanically matching key also requires a matching electronically readable code to produce an operative connection between the key and the locking lug. The electronically readable code can be supplied wirelessly via transponder or via electrical contacts to a transmitter. The evaluation electronics controls the electromechanical locking or coupling element so that the locking lug can be rotated. Such lock cylinders are known in different embodiments.

Such a lock cylinder is, for example, by the DE 199 30 054 A1 disclosed. Here, the arrangement is such that on one side of the cylinder housing a rotary knob is present, the rotationally fixed on the Knock shaft is connected to the locking lug. An actuation is therefore always possible from this page. On the opposite side of the lock cylinder can be actuated by a key, which additionally carries an electrical coding. The electronic evaluation unit is located in the rotary knob, and the decoding signal must be passed from arranged in the cylinder housing antenna via at least one slip ring contact to the electronic evaluation. Such slip ring contacts are relatively expensive to manufacture in the required reliability.

From the DE 101 63 355 C1 a lock cylinder is known in which the locking lug is freely rotatable in the rest position relative to the lock core. The non-rotatable connection between the lock core and locking lug is effected by an axially displaceable sleeve. The DE 196 03 320 A1 describes a lock cylinder in which the rotationally fixed connection between the closing lug and the lock core is produced by a cam extending by means of centrifugal force. The WO 02/088492 A2 discloses a locking pin for a locking core, which is driven via an eccentric and arranged in the lock cylinder housing.

A problem with such lock cylinders when the lock cylinder from both sides should be closed only with appropriate access authorization by means of a knob and / or a key. The closing lug is then fixedly connected to the lock core and / or the knob shaft, which is or is locked via a locking element mounted in the cylinder housing. It can be applied in particular by a rotary knob relatively high forces that are sufficient to destroy the blocking element. Forcible opening is therefore possible.

The invention has for its object to make a lock cylinder different so that a reliable operation in a compact design is possible.

The object is achieved according to the invention in that the locking or coupling element is arranged on or in the lock core or on or in the knob shaft and rotates with this or this and includes an eccentric, a driver between the rest position and the active position - And moved, in which it engages in a recess of the locking lug or a rotary sleeve, on which the locking lug is arranged. This has the advantage that there is no connection to the locking lug without access authorization. Without access authorization, the locking lug therefore can not be operated with an externally accessible element even in the case of violence. Also, a signal transmission via slip ring contacts is no longer required, so that the reliability and reliability can be increased. Further, the locking or coupling element is designed as a driver, which engages in a corresponding recess in the rotary sleeve or the locking lug. It is achieved a very compact structure.

The advantageous use of an electric motor drive with an eccentric drive for the driver reliable operation is achieved in a very compact design. In particular, electric motors are easily controllable and have a relatively low power consumption. In particular, the electric motor in one or the other end position are switched off so that no energy is consumed after the stroke movement effected both in the rest position and in the operative position. The lifetime of the generally off-grid power supply can thus be increased.

If a closing core is present on both sides of the housing, the closing nose is therefore freely rotatable in the rest position of the blocking or coupling element relative to both locking cores. If a knob shaft is present on both sides of the housing, the locking lug in the rest position of the locking or coupling element is freely rotatable relative to both knob shafts. If in one receptacle a lock core and in the other receptacle a knob shaft are rotatably mounted, the locking lug in the rest position of the locking or coupling element is freely rotatable relative to the lock core and the knob shaft. In a half-cylinder with only one lock core or only one knob shaft, the locking lug is freely rotatable in the rest position of the coupling element either to the lock core or to the knob shaft.

According to a further embodiment of the invention it is provided that a continuous closing core or a continuous knob shaft is present, which extends from one side of the housing to the opposite side and can be actuated from both sides by a key or a knob. This embodiment is advantageous, for example, if there is a rotary knob with the evaluation electronics on both sides. At a Lock cylinder with knob shaft and lock core lock core and knob shaft can be rotatably connected together or integrally formed.

It can be provided that the blocking or coupling element comprises an electromagnetic drive. Alternatively, it is possible that the blocking or coupling element comprises an electric motor drive. Both electromagnets and electric motors are available with small installation dimensions, so that they can be easily integrated into the knob shaft or the lock core. Nevertheless, there is still the possibility to equip the lock core, for example, with conventional pin tumblers.

According to a further embodiment of the invention, the rest position and / or the active position of the driver are by a predeterminable angle of rotation beyond the associated dead centers of the eccentric. The respective angle of rotation can be 10 ° to 30 ° above the respective dead center. It is advantageous if the eccentric abuts against a stop after reaching the angle of rotation, which limits and prevents further rotation. This has the advantage that the end positions are achieved with certainty and reproducible. In particular, over-rotation beyond the end position is reliably avoided. Also, the eccentric better in these end positions, for example, by spring or locking elements whose holding force can be overcome by the engine power held.

For this purpose, the eccentric drive can have an eccentrically arranged about the motor axis pin, which in a transverse to the lifting movement of the driver and perpendicular to the motor axis extending groove thereof engages the position and length is dimensioned so that a rotational movement from the rest position to the operative position only in one direction and the rotational movement of the active position in the rest position of the driver only in the opposite direction of rotation is possible. The motor then only needs to be controlled accordingly, namely counterclockwise to reach the rest position and clockwise to reach the active position, or vice versa. This is possible with simple technical means.

Furthermore, it is expedient if the length and position of the groove is chosen so that further rotation of the eccentric is possible from the rest position to the operative position of the driver beyond the dead center by the rotation angle, and vice versa. However, the length of the groove in this extension, which corresponds to a further rotation in the same direction of rotation is shortened, so that a further rotation beyond 90 ° and preferably beyond 45 ° is not possible to prevent spinning. This can be effected by simple means, the desired and targeted lifting movement of the driver by an eccentric.

Due to the fact that the locking lug is freely rotatably mounted to the knob shaft or the lock core and thus freely rotatable relative to the driver on the cylinder housing, the free end of the driver in the rest position and the recess of the locking lug are necessarily not always aligned. A movement of a rigid driver from the rest position into the active position is not possible with twisted recess. It can therefore be provided according to a preferred embodiment of the invention be that the driver comprises a plunger whose free end is guided in a sleeve whose free end is immersed in the operative position in the recess of the locking lug or the rotary sleeve and in the interior of which a compression spring is arranged, which cooperates with the free end of the plunger , This has the advantage that the plunger can also be moved when the recess of the locking lug is twisted and is not in alignment with the stroke of the driver. After the movement of the plunger in its operative position, the sleeve is under pretension, so that in the course of rotation of the knob shaft or the lock core relative to the locking lug the free end comes into alignment with the recess and engages.

It is advantageous if the sleeve has a stop on its side opposite the free end, against which a thickened end of the plunger strikes. This has the advantage that the sleeve is forcibly pulled along in a movement of the plunger in the Ruhlage. Clamping of the sleeve in the recess is avoided.

Furthermore, it is expedient if the depth of the recess of the locking lug or the rotary sleeve is dimensioned so that when engaging driver, the compression spring in the sleeve is still under tension. This will achieve that the eccentric is held in the operative position under bias. Since the active position in the direction of rotation of the eccentric is behind the dead center, a reverse rotation of the eccentric is prevented when engaged driver.

Furthermore, it is advantageous if the driver is held in the rest position by a spring force. Since here also the rest position in the direction of rotation of the eccentric behind the associated dead center, a reverse rotation of the eccentric is prevented in a disengaged driver.

Fig. 1

eine Ansicht der Knaufwelle mit Exzenter und Mitnehmer in der Ruhestellung

Fig. 2

eine Ansicht der Knaufwelle mit Exzenter und Mitnehmer in der Wirkstellung

Fig. 3

eine Ansicht der Knaufwelle mit Exzenter und Mitnehmer in der Wirkstellung, jedoch verdrehter Schließnase, und

Fig. 4

die Seitenansicht einer Knaufwelle.

The invention will be explained in more detail below with reference to the schematic drawing. Show it:

Fig. 1

a view of the knob shaft with eccentric and driver in the rest position

Fig. 2

a view of the knob shaft with eccentric and driver in the operative position

Fig. 3

a view of the knob shaft with eccentric and driver in the operative position, but twisted locking lug, and

Fig. 4

the side view of a knob shaft.

The knob shaft 11 shown in the drawing is rotatably mounted in a hollow cylindrical receptacle 12 of a lock cylinder, not shown. Alternatively it can be stored in the wood cylindrical receptacle and a lock core, which is actuated by means of a key, in particular via mechanical tumblers. The knob shaft shown would be relevant here correspond to pictorial representation of a lock core, so that in the following reference is made only to the knob shaft.

The knob shaft 11 is rotatably connected in a manner not shown with a rotary knob. It is also provided with an electronic evaluation means that can interrogate and evaluate in a known manner an electronic access code of a key or other key element. The lock cylinder also has a locking lug 13, which cooperates with a locking bolt of a lock, not shown.

In the case of a recognized access authorization, an electromechanically operating blocking or coupling element 14, which is described below, is activated, by means of which a rotationally fixed connection between the closing nose and the knob shaft 11 is effected. Then, the lock cylinder can be operated by the knob shaft is rotated with the knob or the lock core by means of a key. From the basic structure, the dimensions and in particular with respect to the electronic detection and evaluation of the access code corresponds to the lock cylinder so far a conventional electromechanical lock cylinder and therefore requires no further explanation.

In detail, the arrangement is such that the locking lug is freely rotatably supported by a rotary sleeve 35 on the knob shaft in the housing. The electromechanically operating blocking or coupling element 14 is arranged in the knob shaft 11 and comprises an eccentric with a rotor 15, on which an axially extending pin 16 is arranged eccentrically to the eccentric axis 17. The pin 16 acts via a groove 18 with a driver 19 together, which moves up and down due to the rotational movement of the rotor. For this purpose, the driver 19 is guided in a guide channel 20 of the knob shaft 11 linearly and in the radial direction to the knob shaft.

The groove 18 extends substantially transversely to the stroke direction of the driver 19. The position and the length of the groove are chosen so that, starting from the in Fig. 1 shown rest position, only by a rotation of the rotor 15 in the direction of rotation 21 of the driver 19 in the in Fig. 2 shown active position can be brought. From the operative position of the driver can be brought back into the rest position only by a rotation in the direction 22.

Furthermore, the length and the position of the groove are chosen so that the eccentric can be rotated in its end positions in each case beyond the dead center of the respective position by a rotation angle. This angle can be for example 10 ° to 30 °. As a result, although the driver undergoes a declining movement, this declining stroke is relatively small relative to the total stroke between the rest position and the active position and does not affect the blocking or release function of the driver. However, the range of the groove shown on the right in the drawing is such that further rotation of the rotor in the direction of rotation 22 by more than the predetermined rotation angle above the top dead center (rest position) is not possible because the pin 16 previously at the frontal boundary of Groove strikes. The same applies to the movement in the direction of rotation 21 beyond the bottom dead center (active position) addition. This ensures that the driver is held firmly by the eccentric in the respective end position, as a complete turning back only beyond the dead center out, but in opposite Direction is possible. The respective end position is therefore always safely reached and held when the drive motor 23 of the eccentric is driven sufficiently long with energy to rotate in one or the other direction.

The driver 19 has a plunger 24, one end of which carries the groove 18 and is mounted on the pin 16 of the eccentric. The free end 25 of the plunger is guided in a sleeve 26. The opposite free end 27 of the sleeve emerges in the Fig. 2 shown active position in a recess 28 of the locking lug. Then there is a non-rotatable connection between the locking lug and the knob shaft and thus between the locking lug and the knob, and the lock can be actuated.

Inside the sleeve 26, a compression spring 29 is arranged, which cooperates with the free end of the plunger. It is at the opposite end of the free end of the sleeve 26, a stop 30 is provided, against which the thickened end 25 of the plunger 24 abuts. Thus, the sleeve is held securely on the plunger. By this arrangement it is achieved that the plunger can be extended by the eccentric even from the rest position of the driver when the free end 27 of the sleeve 26, as in Fig. 3 shown, not in alignment with the recess 28 of the locking lug 13 is located. Rather, the free end 27 abuts the inner wall of the rotary sleeve 35 and the compression spring is compressed. The free end 27 engages only in the course of a rotary movement of the knob shaft, as soon as the free end 27 passes over the recess. This safe operation is achieved even with twisted locking lug, which in the rest position of the driver relative to the Knauf shaft and also freely rotatable to the housing of the lock cylinder.

The free end 27 of the sleeve is formed as an expanding projection 32 with a narrower neck portion 34 and a rounded end edge. In order for a secure engagement of the projection when passing over the recess 28 is achieved when the spring 29 tensioned.

It is further provided that the recess 28 of the locking lug 13 is closed in the insertion direction of the driver or a stop 33, wherein the depth of the recess is dimensioned so that when immersed projection 32, the compression spring 29 is still under tension and the free end 25 of Tappet not yet abuts the stop 30. This ensures that the eccentric pin 16 is held in tension beyond the associated dead center via the tappet and the groove in the end position of the eccentric corresponding to the active position. The eccentric can then no longer turn back by itself, for example, by gravity, even if the power supply of the drive motor is interrupted.

In the end position corresponding to the rest position acts a force of a compression spring, not shown, for example, a leaf or coil spring on the top of the drawing in the drawing 31 of the plunger 24. As a result, the eccentric pin 16 via the plunger 24 and the groove 18 in the rest position corresponding end position of the eccentric beyond the associated dead center out under tension. The eccentric can not turn back in this position by itself, for example, by gravity, even if the power supply to the drive motor is interrupted. A sure stop of the Eccentric and thus the driver in both end positions is thus ensured.

For a perfect functioning of the lock cylinder even under unfavorable conditions, it is necessary to know the position of the coupling element. In particular, when the lock cylinder is not to be actuated, it is important to ensure that the coupling element is in the rest position. In principle, it is possible to control the coupling element, for example the eccentric motor, several times by means of the already present evaluation electronics after a successful actuation of the lock cylinder in such a way that it moves into the rest position. This also does not always ensure that the coupling element is actually in the rest position.

It can therefore be provided that detection means 36 are present, which detect the position or the position of the coupling element. The detection means may comprise at least one Hall sensor 37 and / or at least and / or at least one capacitive or inductive sensor 38 or a switch 39 which cooperates with a movable element of the coupling element. In the Fig. 2 is an example of a Hall sensor 37 and in Fig. 3 By way of example, a capacitive sensor 38 in the form of a capacitor arrangement of half-rings, which are influenced on the basis of the position of the driver, are shown. The driver is preferably made of metal, so that its position in front of the Hall sensor or between the capacitor rings can be well detected.

Fig. 1 shows a limit switch 39, which cooperates with the eccentric of the motor. The limit switch can be used as Tast switch be formed, which simultaneously applies the spring force to hold the driver in the rest position behind the top dead center of the eccentric.

It can be generated by the sensors or the switch, a signal corresponding to the position of the coupling element and in particular of the driver. There may be a signal when the coupling element or the driver 19 are in the operative position. As long as this signal is present, the coupling element is driven by the transmitter to move to the rest position. Of course, it can also be provided that a signal is present when the coupling element is in the rest position. The control of the coupling element and / or the interrogation of the signal can be performed in cycles or after a predetermined period of time.

By this arrangement of the driver and the eccentric drive in the knob shaft or in the lock core and in the rest position relative to the knob shaft or the lock core or cylinder housing completely freely rotatable locking lug, it is possible to provide, for example, a lock cylinder with two-sided knob, with an actuation of each side only possible with access authorization. Here, both rotary knobs can even sit on a common knob shaft. The same applies to one-sided rotary knob cylinder, which can be operated from one side by a key and from the other side only when access authorization. Also lock cylinder can be equipped with double-sided key operation accordingly.

Claims (19)

1. Electromechanical lock cylinder that can co-operate with an electronic evaluation unit to recognise access authorisation, and has a housing that comprises two cylindrical seats (12) lying opposite one another, in which respectively either a lock core that can be operated by a key, or a knob shaft (11) that is connected to a knob in a rotationally fixed manner, are mounted so as to rotate, wherein the lock cores or the knob shafts (11) co-operate with a lock lug (13) which can operate, in particular, a bolt or latch of a door lock, and with a suitable key or recognised access authorisation, an electromechanically driven blocking or coupling element (14) is moved from the resting position into an operative position and produces a rotationally fixed connection between the key or knob and the lock lug, whilst the lock lug (13), in the resting position of the blocking or coupling element (14), can be freely rotated relative to the two lock cores or the two knob shafts,
   characterised in that the blocking or coupling element (14) is arranged on or in the lock core, or on or in the knob shaft (11), and rotates together with it, and includes an eccentric (15, 16) that moves a driver (19) back and forth between the resting position and the operative position, in which it engages into a recess (28) of the lock lug (13) or of a rotary sleeve (35) on which the lock lug is arranged.
2. Lock cylinder according to claim 1, characterised in that there is a continuous lock core or continuous knob shaft (11) which extends from one side of the housing to the opposite side, and which from either side can be operated by a key or turned by a knob.
3. Electromechanical lock cylinder that can co-operate with an electronic evaluation unit to recognise access authorisation, and has a housing that comprises two cylindrical seats (12) lying opposite one another, in which rotationally mounted on one side of the housing is a lock core that can be operated by a key, and rotationally mounted on the opposite side is a knob shaft (11) that is connected to a knob in a rotationally fixed manner, wherein the lock core and/or knob shaft (11) co-operate with a lock lug (13) which can operate, in particular, a bolt or latch of a door lock, and with a suitable key or recognised access authorisation, an electromechanically driven blocking or coupling element (14) is moved from the resting position into an operative position and produces a rotationally fixed connection between the key and/or knob and the lock lug, whilst the lock lug (13), in the resting position of the blocking or coupling element (14), can be freely rotated relative to the lock core and the knob shaft (11), characterised in that the blocking or coupling element (14) is arranged on or in the lock core, or on or in the knob shaft (11), and rotates together with it, and includes an eccentric (15, 16) that moves a driver (19) back and forth between the resting position and the operative position, in which it engages into a recess (28) of the lock lug (13) or of a rotary sleeve (35) on which the lock lug is arranged.
4. Electromechanical lock cylinder according to claim 3, characterised in that lock core and knob shaft (11) are joined to one another in a rotationally fixed manner, or are designed to be in one piece.
5. Electromechanical lock cylinder that co-operates with an electronic evaluation unit to recognise access authorisation, and has a housing that comprises a cylindrical seat, in which either a lock core that can be operated by a key, or a knob shaft (11) that is connected to a knob in a rotationally fixed manner, are mounted so as to rotate, wherein the lock core or the knob shaft (11) can co-operate with a lock lug (13) which can operate, in particular, a bolt or latch of a door lock, and with a suitable key or recognised access authorisation, an electromechanically driven blocking or coupling element (14) is moved from the resting position into an operative position and produces a rotationally fixed connection between the key or knob and the lock lug, whilst the lock lug (13), in the resting position of the blocking or coupling element (14), can be freely rotated relative to the lock core or the knob shaft, characterised in that the blocking or coupling element (14) is arranged on or in the lock core, or on or in the knob shaft (11), and rotates together with it, and includes an eccentric (15, 16) that moves a driver (19) back and forth between the resting position and the operative position, in which it engages into a recess (28) of the lock lug (13) or of a rotary sleeve (35) on which the lock lug is arranged.
6. Lock cylinder according to one of the claims 1 to 5, characterised in that the resting position and/or the operative position of the driver (19) lie beyond the assigned dead centres of the eccentrics (15, 16) by an angle of rotation that can be predetermined.
7. Lock cylinder according to claim 6, characterised in that the angle of rotation is 10° to 30° beyond the respective dead centre.
8. Lock cylinder according to one of the claims 1 to 7, characterised in that the eccentric (15, 16) has a pin (16) which is arranged eccentrically around a motor axis (17) of an electromotive drive (23) and which engages into a groove (18) that extends crosswise to the lift movement of the driver (19) and perpendicular to the motor axis (17) of the same, the position and length of which [groove] are dimensioned such that a rotary movement from the resting position into the operative position is possible only in one direction of rotation, and the rotary movement (21) from the operative position into the resting position of the driver (19) is possible only in the opposite direction of rotation (22).
9. Lock cylinder according to claim 8, characterised in that the length and position of the groove (18) are chosen so as to permit further rotation of the eccentric (15,16) from the resting position into the operative position of the driver (19), beyond the dead centre around the angle of rotation, and vice versa.
10. Lock cylinder according to one of the claims 1 to 9, characterised in that the driver (19) includes a slide (24) whose free end (25) is guided in a sleeve (26), whose free end (27), in the operative position, enters the recess (28) of the lock lug (13) or rotary sleeve (35), and in whose interior there is arranged a compression spring (29) that co-operates with the free end (25) of the slide (24).
11. Lock cylinder according to claim 10, characterised in that on its side opposite the free end, the sleeve (26) has a limit stop (30), against which the thickened end (25) of the slide (24) stops.
12. Lock cylinder according to one of the claims 10 or 11, characterised in that the depth of the recess (28) of the lock lug (13) or rotary sleeve (35) is dimensioned so that when the driver (19) is engaged, the compression spring (29) in the sleeve (26) is still under tension.
13. Lock cylinder according to one of the claims 1 to 12, characterised in that the driver (19) is held in the resting position by spring force.
14. Lock cylinder according to one of the claims 1 to 13, characterised in that detection elements (36) are present, which detect the location or position of the coupling element (14).
15. Lock cylinder according to claim 14, characterised in that the detection elements (36) include at least one Hall sensor (37) and/or at least one capacitive or inductive sensor (38) or a switch (39) which co-operates with a movable element of the coupling element (14).
16. Lock cylinder according to claim 15, characterised in that die detection elements (36) co-operate with the driver (19).
17. Lock cylinder according to claim 15, characterised in that the detection element (36) detects the position of the eccentric (15, 16) or of the motor shaft of an electromotive drive (23) of the blocking or coupling element (14).
18. Lock cylinder according to one of the claims 14 to 17, characterised in that the detection element (36) produces at least one signal, and preferably a sequence of signals, in order to move the coupling element (14) into the resting position, as long as the coupling element (14) is in the operative position or not yet in the resting position, and insofar as the resting position is to be assumed.
19. Lock cylinder according to one of the claims 1 to 18, characterised in that the blocking or coupling element includes an electromechanical or electromotive drive (23).

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