EP1636454A1

EP1636454A1 - Electromechanical lock cylinder

Info

Publication number: EP1636454A1
Application number: EP04737108A
Authority: EP
Inventors: Volker Krisch; Hardy Bismark; Bernhard Müller; Jürgen Hofmann; Bertrand Roland
Original assignee: Buga Technologies GmbH
Current assignee: Assa Abloy AB
Priority date: 2003-06-23
Filing date: 2004-06-22
Publication date: 2006-03-22
Anticipated expiration: 2024-06-22
Also published as: CN1813114B; CA2529104C; BRPI0411781A; US20060213240A1; US7874190B2; CA2529104A1; WO2005001224A1; MXPA05013454A; NZ544843A; AU2004251188A1; AU2004251188B2; DE502004007064D1; DE10328297A1; ATE394568T1; CN1813114A; EP1636454B1

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

Electromechanical locking cylinder

description

The invention relates to an electro-mechanical locking cylinder which interacts with evaluation electronics for recognizing access authorization and has a housing which is provided with at least one receptacle in which at least one locking core, which can be actuated by a key, or a knob shaft is rotatably mounted, which is rotatably connected to a knob for actuation, the locking core or knob shaft interacting with a locking lug, which in particular actuates a bolt or a latch of a door lock, and, with the appropriate key and / or recognized access authorization, an electro-mechanically driven locking or coupling element from the rest position in a

Active position is moved in which there is a rotationally fixed connection between the key and / or knob and the locking lug.

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

BESTATIGUNGSKOPIE In the case of electromechanical locking cylinders which can be actuated with a key, in addition to a mechanically suitable key which is often still required, a suitable electronically readable code is also required in order to establish an operative connection between the key and the locking lug. The electronically readable code can be fed wirelessly to an electronic evaluation system via transponders or electrical contacts. The evaluation electronics control the electromechanical locking or coupling element in such a way that the locking lug can be turned. Such locking cylinders are known in different embodiments.

Such a lock cylinder is disclosed for example by DE 199 30 054 AI. The arrangement here is such that there is a rotary knob on one side of the cylinder housing, which is connected to the locking lug in a rotationally fixed manner via the knob shaft. An actuation is therefore always possible from this side. On the opposite side, the locking cylinder can be operated using a key that also carries an electrical code. The evaluation electronics are located in the rotary knob, and the decoding signal must be passed from the antenna arranged in the cylinder housing to the evaluation electronics via at least one slip ring contact. Such slip ring contacts are relatively complex to manufacture with the required reliability.

A problem with such locking cylinders is when the locking cylinder should only be lockable from both sides with a corresponding access authorization by means of a knob and / or a key. The locking nose is then with the locking core and / or Knob shaft firmly connected, which is locked via a locking element mounted in the cylinder housing. Relatively high forces which are sufficient to destroy the blocking element can be applied in particular by means of a rotary knob. A violent opening is therefore possible.

The invention is based on the object of designing a locking cylinder differently in such a way that a flexible arrangement of evaluation electronics, rotary knobs or locking cores with or without a key is possible.

The object is achieved according to the invention in that the locking lug can be freely rotated relative to the locking core or the knob shaft in the rest position of the locking or coupling element. This has the advantage that there is no connection whatsoever to the locking lug without access authorization. Without access authorization, the locking nose cannot be operated with an externally accessible element, even when using force.

If there is a locking core on both sides of the housing, the locking lug can accordingly be freely rotated relative to both locking cores in the rest position of the locking or coupling element. If there is a knob shaft on both sides of the housing, the locking lug can be freely rotated relative to both knob shafts in the rest position of the locking or coupling element. If a locking core is rotatably mounted in one receptacle and a knob shaft is rotatably mounted in the other receptacle, the locking nose is in the rest position of the locking or coupling element relative to the locking core and the knob can be freely rotated. For a half cylinder with only one locking core or only one knob shaft, this is Locking lug in the rest position of the coupling element either to the locking core or to the knob shaft freely rotatable.

According to a further embodiment of the invention, it is provided that a continuous locking 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. In the case of a locking cylinder with a knob shaft and a locking core, the locking core and knob shaft can be connected to one another in a rotationally fixed manner or can be formed in one piece.

In particular, it can then be provided that the locking or coupling element is arranged in or on the locking core or in or on the knob and rotates with it. A signal transmission via slip ring contacts is no longer necessary, so that operational reliability and reliability can be increased.

The locking lug can be stored anywhere in the housing. It is advantageous if the locking lug is arranged on a rotatable rotating sleeve. Then the locking or coupling element can be designed as a driver which engages in a corresponding recess in the rotating sleeve or the locking lug. A very compact structure is achieved.

It can be provided that the locking or coupling element is an electromagnetic drive includes. Alternatively, it is possible for the locking or coupling element to comprise 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 locking core. Nevertheless, there is still the possibility of equipping the locking core with conventional pin tumblers, for example.

According to a preferred embodiment of the invention, it is provided that the electromotive drive has an eccentric drive which moves the driver back and forth between the rest position and the active position in which it engages in the recess of the locking lug or the rotating sleeve. This ensures reliable operation with a very compact design. In particular, electric motors are easy to control and have a relatively low power consumption. In particular, the electric motor can be switched off in one or the other end position, so that after the stroke movement effected, no more energy is consumed both in the rest position and in the active position. The lifespan of the generally off-grid power supply can thus be increased.

According to a further embodiment of the invention, the rest position and / or the operative position of the driver lie by a predeterminable angle of rotation beyond the assigned 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 hits a stop after reaching the angle of rotation, which limits and prevents further rotary movement. This has the advantage that the end positions are reached safely and reproducibly. In particular, overturning beyond the end position is reliably avoided. The eccentric can also be held better in these end positions, for example by spring or locking elements, the holding force of which can be overcome by the motor force.

For this purpose, the eccentric drive can have a pin which is arranged eccentrically around the motor axis and which engages in a groove extending transversely to the stroke movement of the driver and perpendicular to the motor axis, the position and length of which is dimensioned such that a rotary movement from the rest position into the active position only in one direction of rotation and the rotary movement from the active position into the rest position of the driver is only possible in the opposite direction of rotation. The motor then only needs to be controlled accordingly, namely counterclockwise rotation to reach the rest position and clockwise rotation 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 selected so that the eccentric can be turned further from the rest position into the active position of the driver beyond the dead center by the angle of rotation, 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 further rotation beyond 90 ° and preferably beyond 45 ° is not possible in order to prevent spinning.

The desired and targeted lifting movement of the driver can thus be effected by an eccentric with simple means. Due to the fact that the locking lug is freely rotatable to the knob shaft or to the locking core and thus also 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 not always in alignment. A movement of a rigid driver from the rest position into the active position is not possible when the recess is rotated. It is therefore provided according to the invention that the driver comprises a plunger, the free end of which is guided in a sleeve, the free end of which dips into the recess of the locking lug or the rotating sleeve in the operative position and a compression spring is arranged in the interior thereof cooperates with the free end of the pen. 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 prestress, so that in the course of a rotation of the knob shaft or the locking core relative to the locking lug, the free end is aligned 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 abuts. This has the advantage that the sleeve is forcibly pulled along when the plunger moves into the rest position. Pinching of the sleeve in the recess is avoided.

Furthermore, it is useful if the depth of the

The recess of the locking lug or the rotating sleeve is dimensioned so that when the driver engages, the compression spring in the sleeve is still under tension. This ensures that the eccentric is held under tension in the active position. Since the effective position in the direction of rotation of the eccentric is behind the dead center, the eccentric is prevented from turning back when the drivers are in engagement.

Furthermore, it is expedient if the driver is held in the rest position by a spring force. Since the rest position in the direction of rotation of the eccentric is also behind the assigned dead center, the eccentric is prevented from turning back when a driver is out of engagement.

The invention is explained below with reference to the schematic drawing. Show it:

Fig. 1 is a view of the knob shaft with eccentric and driver in the rest position

Fig. 2 is a view of the knob shaft with eccentric and driver in the active position

Fig. 3 is a view of the knob shaft with eccentric and driver in the active position, but twisted locking nose, and

Fig. 4 is a 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 locking cylinder, not shown. Alternatively, a locking core can also be mounted in the wooden cylindrical receptacle, which can be actuated by means of a key, in particular via mechanical tumblers. The knob wave shown would be the relevant one here correspond to the pictorial representation of a locking core, so that in the following only the knob shaft is referred to.

The knob shaft 11 is rotatably connected in a manner not shown with a rotary knob. Evaluation electronics with electronic means are also provided, which can query and evaluate an electronic access code of a key or another key element in a known manner. The locking cylinder also has a locking lug 13 which interacts with a locking bolt of a lock, not shown.

If access authorization is recognized, an electromechanically operating locking or coupling element 14 described below is activated, by means of which a rotationally fixed connection between the locking lug and the knob shaft 11 is effected. The lock cylinder can then be actuated by turning the knob shaft with the rotary knob or the lock core using a key. The locking cylinder corresponds to a conventional electromechanical locking cylinder in terms of the basic structure, the dimensions and in particular with regard to the electronic recording and evaluation of the access code and therefore requires no further explanation.

In detail, the arrangement is such that the locking lug is freely rotatably mounted on the knob shaft in the housing by means of a rotating sleeve 35. The electromechanically operating locking 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 cooperates via a groove 18 a driver 19 together, which moves up and down due to the rotary movement of the rotor. For this purpose, the driver 19 is guided linearly in a guide channel 20 of the knob shaft 11 and in the radial direction to the knob shaft.

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

Furthermore, the length and the position of the groove are selected so that the eccentric can be rotated in its end positions beyond the dead center of the respective position by an angle of rotation. This angle can be, for example, 10 ° to 30 °. As a result, the driver experiences a retrograde movement, but this retrograde stroke is small relative to the total stroke between the rest position and the active position and has no effect on the blocking or release function of the driver. However, the area of the groove shown in the drawing on the right is dimensioned such that a further rotation of the rotor in the direction of rotation 22 by more than the predetermined angle of rotation beyond top dead center (rest position) is not possible, since the pin 16 previously on the front end of the Groove strikes. The same applies to the

Movement in the direction of rotation 21 over the bottom dead center

(Active position). This ensures that the

Driver is held firmly in the respective end position by the eccentric, since a complete turning back only beyond the dead center, but in the opposite direction Direction is possible. The respective end position is therefore always safely reached and held when the drive motor 23 of the eccentric is actuated with energy for turning in one direction or the other for a sufficiently long time.

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 dips into a recess 28 of the locking lug in the operative position shown in FIG. 2. Then there is a non-rotatable connection between the locking lug and the knob shaft and thus between the locking lug and the turning knob, and the lock can be actuated.

In the interior of the sleeve 26, a compression spring 29 is arranged, which cooperates with the free end of the plunger. There is a stop 30 on the side of the sleeve 26 opposite the free end, against which the thickened end 25 of the plunger 24 abuts. So that the sleeve is held securely on the plunger. This arrangement ensures that the tappet can also be extended by the eccentric from the rest position of the driver when the free end 27 of the sleeve 26, as shown in FIG. 3, is not in alignment with the recess 28 of the locking lug 13 lies. Rather, the free end 27 abuts the inner wall of the rotating sleeve 35 and the compression spring is compressed. The free end 27 only engages in the course of a rotary movement of the knob shaft as soon as the free end 27 passes over the recess. This ensures safe operation even when the locking nose is rotated, which is relative to the driver when the driver is in the rest position Knob shaft and also to the housing of the lock cylinder is freely rotatable.

The free end 27 of the sleeve is designed as a widening projection 32 with a narrower neck region 34 and a rounded end edge. This ensures that the projection engages securely when the recess 28 is swept over when the spring 29 is under tension.

Furthermore, it is provided that the recess 28 of the locking lug 13 is closed in the insertion direction of the driver or has a stop 33, the depth of the recess being dimensioned such that when the projection 32 is immersed, the compression spring 29 is still under tension and the free end 25 of the Tappet is not yet against the stop 30. It is thereby achieved that the eccentric pin 16 is kept under tension via the plunger and the groove in the end position of the eccentric corresponding to the active position beyond the assigned dead center. The eccentric can then no longer turn back on its own, for example due to gravity, even if the power supply to the drive motor is interrupted.

In the end position corresponding to the rest position, a force of a compression spring (not shown), for example a leaf or coil spring, acts on the upper region 31 of the plunger 24 in the drawing. As a result, the eccentric pin 16 is in the rest position via the plunger 24 and the groove 18 corresponding end position of the eccentric kept under tension beyond the assigned dead center. Even in this position, the eccentric can no longer turn back on its own, for example due to 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 guaranteed.

For the locking cylinder to function properly, even under unfavorable conditions, it is necessary to know the position of the coupling element. Particularly if the lock cylinder is not to be actuable, 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 at intervals after the actuation of the locking cylinder, after the actuation of the locking 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 can 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 interacts with a movable element of the coupling element. 2 shows a Hall sensor 37 as an example and in FIG. 3 a capacitive sensor 38 in the form of a capacitor arrangement made of half rings, which are influenced due to the position of the driver. The driver is preferably made of metal so that its position in front of the Hall sensor or between the capacitor rings can be easily detected.

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

A signal can be generated by the sensors or the switch which corresponds 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 is in the active position. As long as this signal is present, the coupling element is actuated by the evaluation electronics to move into 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 activation of the coupling element and / or the interrogation of the signal can take place in cycles or after a predetermined period of time.

This arrangement of the driver and the eccentric drive in the knob shaft or in the locking core and a locking lug which can be rotated freely in its rest position relative to the knob shaft or the locking core or cylinder housing makes it possible, for example, to provide a locking cylinder with a knob on both sides, with actuation from each side is only possible with access authorization. Here, both knobs can even sit on a common knob. The same applies to one-sided rotary knob cylinders that can be operated from one side with a key and from the other side only with access authorization. Lock cylinders with key actuation on both sides can also be equipped accordingly.

Claims

Electromechanical locking cylinder claims

1. Electromechanical locking cylinder which interacts with evaluation electronics for recognizing an access authorization and has a housing which comprises two opposing cylindrical receptacles, in each of which either a locking core, which is separated by a

The key can be actuated, or a knob shaft (11), which is connected in a rotationally fixed manner to a knob, is rotatably mounted, the locking cores or the knob shafts interacting with a locking lug (13), which in particular actuates a bolt or a locking latch of a door lock, and with a suitable key or access authorization, an electromechanically driven locking or coupling element (14) is moved from the rest position into an active position and creates a rotationally fixed connection between the key or knob and the locking lug, characterized in that the locking lug (13) is in the rest position of the Locking or coupling element is freely rotatable relative to both closing cores or to both knob shafts.

2. Lock cylinder according to claim 1, characterized in that there is a continuous locking core or a continuous knob shaft 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 can be rotated.

3. Electromechanical locking cylinder which interacts with evaluation electronics for recognizing an access authorization and has a housing which comprises two opposing cylindrical receptacles, in which a locking core, which can be actuated by a key, on one side of the housing and on the opposite side a knob shaft (11), which is connected in a rotationally fixed manner to a knob, is rotatably mounted, the locking core and / or knob shaft interacting with a locking lug (13) which in particular actuates a bolt or a locking latch of a door lock, and with a suitable key and / or access authorization, an electromechanically driven locking or coupling element (14) is moved from the rest position into an active position and produces a rotationally fixed connection between the key and / or knob and the locking lug, characterized in that the locking lug (13) is in the rest position of the locking or coupling ngselements relative to the locking core (11) and the knob shaft is freely rotatable.

4. Electromechanical locking cylinder according to claim 3, characterized in that the locking core and knob shaft are rotatably connected to one another or are formed in one piece.

5. Electromechanical locking cylinder, which interacts with evaluation electronics for recognizing access authorization and has a housing which comprises a cylindrical receptacle in which either a locking core, which can be actuated by a key, or a knob shaft (11), which is rotationally fixed with a knob is connected, is rotatably mounted, the locking core or the knob shaft interacting with a locking lug (13), in particular a bolt or actuates a locking latch of a door lock and, with the appropriate key and / or access authorization, an electromechanically driven locking or coupling element (14) is moved from the rest position into an active position and generates a rotationally fixed connection between the key or knob and the locking lug, characterized in that the locking lug (13) can be freely rotated in the rest position of the locking or coupling element relative to the locking core or to the knob shaft.

6. Lock cylinder according to one of claims 1 to 5, characterized in that the locking or coupling element (14) on or in the locking core or on or in the knob shaft (11) is arranged and rotates with it or this.

7. Lock cylinder according to one of claims 1 to 4, characterized in that the locking lug (13) is arranged on a rotatable rotary sleeve (35).

8. Lock cylinder according to one of claims 1 to 7, characterized in that the locking or coupling element comprises an electromagnetic drive.

9. Lock cylinder according to one of claims 1 to 8, characterized in that the locking or coupling element comprises an electric motor drive (23).

10. Lock cylinder according to claim 9, characterized in that the electromotive drive has an eccentric (15, 16) which has a driver (19) between the rest position and the active position in which it engages in a recess (28) of the locking lug (13) or the rotating sleeve, reciprocating.

11. Lock cylinder according to claim 10, characterized in that the rest position and / or the

Active position of the driver (19) by a predetermined

Angle of rotation are beyond the assigned dead centers of the eccentric (15, 16).

12. Lock cylinder according to claim 11, characterized in that the angle of rotation is 10 ° to 30 ° above the respective dead center.

13. Lock cylinder according to one of claims 10 to 12, characterized in that the eccentric has a pin (16) which is arranged eccentrically around the motor axis (17) and which extends in a direction transverse to the stroke movement of the driver (19) and perpendicular to the motor axis Groove (18) engages the same, the position and length of which is dimensioned such that a rotary movement from the rest position into the active position only in one direction of rotation and the rotary movement (21) from the active position into the rest position of the driver only in the opposite direction of rotation (22 ) is possible.

14. Lock cylinder according to claim 13, characterized in that the length and position of the groove (18) is selected so as to allow the eccentric to be rotated further from the rest position into the operative position of the driver beyond the dead center by the angle of rotation, and vice versa.

15. Lock cylinder according to one of claims 10 to 14, characterized in that the driver comprises a plunger (24), the free end (25) of which in a sleeve (26) is guided, the free end (27) in the active position in the recess (28) of the locking lug (13) or the rotating sleeve and inside which a compression spring (29) is arranged, which cooperates with the free end of the pin.

16. Lock cylinder according to claim 15, characterized in that the sleeve has on its side opposite the free end a stop (30) against which the thickened end (25) of the plunger (24) abuts.

17. Lock cylinder according to one of claims 15 'or 16, characterized in that the depth of the recess (28) of the locking lug or the rotating sleeve is dimensioned such that when the driver engages, the compression spring (29) is still under tension in the sleeve.

18. Lock cylinder according to one of claims 10 to 17, characterized in that the driver in the

Rest position is held by a spring force.

19. Lock cylinder according to one of claims 1 to 18, characterized in that detection means (36) are present which detect the position or position of the coupling element.

20. Lock cylinder according to claim 19, characterized in that the detection means 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 is connected to a movable element of the coupling element interacts.

21. Lock cylinder according to claim 20, characterized in that the detection means (36) cooperates with the driver (19).

22. Lock cylinder according to claim 19, characterized in that the detection means (36) detects the position of the eccentric or the motor shaft.

23. Lock cylinder according to one of claims 19 to 22, characterized in that the detection means generates at least one signal and preferably as long as successive signals to move the coupling element into the rest position, as long as the coupling element is in the active position or not yet in the rest position and if the rest position is to be taken.