EP0743412A1 - Profiled lock cylinder - Google Patents

Abstract

The lock (1) has a circular cylindrical section (2) and a bar-shaped section (3) into which the core (4) is fitted. The cylindrical section has radial tumblers (6) whose function is augmented by that of a bolt (8) movable between closed and open positions (9,10) by an electric drive (11). Information encoded (18) on the key is read by a contactless decoder (19) connected to a control unit (17), bistable switch (16) and battery (15). The decoder is located in the vicinity of the point (26) where the keyhole (7) passes through the wall of the core.

Description

The present invention relates to a profile cylinder with a circular-cylindrical area receiving the locking core and with a web-like area located thereon, with tumblers arranged radially in the direction of the key channel and being elastically supported in the circular-cylindrical area.

Such profile cylinder is known for example from DE 43 36 476.

The advantage of this known profile cylinder lies in particular in the wide range of possible variations, since the radially oriented tumblers can also be provided multiple times within one tumbler plane.

However, it must be assumed that the scope of the present application should not only include arrangements for the tumblers according to DE 43 36 476 above, but also any tumblers that are provided radially in the direction of the key channel and only in the circular cylindrical region of the profile cylinder.

The compact design that can be achieved with these profile cylinders, despite increased security due to an increased number of variations, does not yet permit electronically secured user identification, which can only be achieved by introducing an electronic one Information decides whether the locking core can be actuated at all by the inserted key.

Such an electronic user ID has only been implemented in the course of increasing security requirements in a design integrated within the profile cylinder for cases in which the additional electronic information on the key causes an undesirably long key length.

It is therefore an object of the invention to develop the known profile cylinder with its compact radial arrangement of tumblers in such a way that it can only be actuated independently of the mechanical tumbler when a given information item that can be recognized as access authorization is present.

This object is achieved in the profile cylinder mentioned at the outset in that, in addition to the tumblers in the circular-cylindrical area in the web area, a locking element which is driven in such a movable manner is provided that the locking element engages in a closed position in the rotational mobility of the locking core, and in an open position releases the locking core , wherein the locking element is operatively connected to a drive between the closed and open positions and wherein the drive can be controlled in dependence on information attached to the key. The arrangement of the locking element in the web area therefore does not force a reduction in the number of tumblers. With a short length of the profile cylinder, the locking element creates an additional locking point that is independent of the number of mechanical locking devices. The locking element is arranged outside the tumbler rows and preferably in the locking cylinder where the locking core has a breakthrough point in the circumferential direction.

The advantage of the invention is that, in addition to increased security due to the radial tumblers in the circular cylindrical region of the profile, the entire previously unused web-like region of such profile cylinders for receiving a motor-driven locking element can be used in addition to the associated control circuit, with the associated energy store possibly also being arranged there.

It is essential that the motor-driven locking element acts on its closing core in addition to the radial tumblers. This creates a double security against unauthorized opening, because although the tumblers are opened even with a mechanically correct key, the electrically driven lock engages in the locking core unaffected. Only when there is the right combination of key cuts to align the tumblers with the right electrical, electromagnetic, electrotechnical or the like. The locking core is released to control the locking element and only then can the locking core be rotated. In the context of the present application, the term “tumbler” is understood to mean an arrangement of at least two pins lying against one another on the end face, which together with a spring are only seated in the circular-cylindrical region of the locking cylinder and which are held in a preferred position by the spring in a bore passing through the profile cylinder and the locking core become. Essential for these tumblers is the fact that only after inserting the correct key, the key cuts provided on it shift the tumblers in their bore so that the parting plane of the adjacent pins lies in the plane of rotation between the locking core and the surrounding cylinder housing.

The locking element can be provided on the outside of the door or on the inside of the door. The arrangement on the outside of the door is particularly advantageous since the locking core located there is then additionally secured against burglary by means of the locking element. An electric or electromotive drive is preferably provided for the blocking element. This can also be an electromagnetic drive. However, if it is assumed that the locking element only requires a closed position and an open position, an electric motor-driven crank can be provided for driving the locking element, which crank is located between an upper and an upper bottom dead center is rotatable back and forth. Suitable micromotors can be provided for this, possibly acting on the crank via reduction gears. Button cells or high-performance batteries, for example of type A 23.12 volts, can be considered as electrical energy stores.

Electrical energy storage devices should preferably be arranged on the inside of the door in order to protect them from frost in the cold seasons, in particular to increase the service life.

If the information required for recognizing the access authorization is attached to the key where the recesses for aligning the tumblers are located, not only can a lock cylinder of short overall length be used, but also a key whose length is not longer than that required to actuate the mechanical tumblers Length goes out.

In extreme cases, the information carrier lies exclusively within the longitudinal key area, which also carries the recesses for aligning the tumblers.

The invention can be used in profile cylinders with a reversible key or with a non-reversible key.

The use of non-reversible keys is particularly advantageous, since on the one hand the radially arranged tumblers provide sufficient variation in this type of profile cylinder and the area of the key spine which is not provided with recesses can easily accommodate the corresponding information carrier (s).

The information carrier can be scanned either without contact or mechanically. Non-contact information scanning is preferred because it is free of wear. Lightwave scanning is particularly suitable for this.

A preferred embodiment is characterized in that the key channel in the wall of the locking core in Breaks through towards the web area of the profile cylinder. This has manufacturing advantages for the manufacture of the locking core. Then on the one hand the information carrier and on the other hand the information reading device are to be attached in the area of the breakthrough point on the stationary part of the profile cylinder and at the corresponding point on the back of the key. This not only saves additional transmission elements, but also the stored information is immediately transmitted, recognized and used for the control.

A further development of the invention provides for the lock to be in the form of a fork. This creates two locking pins that engage in the locking core. The fork with its tines is essentially such that the two tines lie on different sides of the axial plane that intersects the web region in the middle.

If one also arranges the information carrier on the key so that it runs over its stationary associated reading device on the profile cylinder before the inserted key has reached the end stop, this offers an additional advantage: for reading and processing the information "access authorization" and for controlling the The drive and the movement of the locking element into the open position must be estimated for a certain time. During this time, the key with the locking core must not be turned, otherwise the locking element would be jammed at the joint between the locking core and the cylinder housing.

However, if one provides to transmit the associated information for activating the locking element before the tumblers are mechanically unlocked (= end position of the key), this danger is eliminated. The motorized lock will be opened before the tumblers are mechanically opened.

Fig.1

ein erstes Ausführungsbeispiel der Erfindung im Prinzip,

Fig.1a

Querschnitt des Ausführungsbeispiels in Fig.1 entlang der Linie II-II

Fig.2

ein weiteres Ausführungsbeispiel der Erfindung,

Fig.3

ein Ausführungsbeispiel der Erfindung mit zeitlich vor Erreichen des Endanschlags erfolgter Informationsübertragung,

Fig.3a

Querschnitt des Ausführungsbeispiels in Fig.3 entlang der Linie III-III, und

Fig.4

Sperrelement mit elektromagnetischem Antrieb.

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

Fig. 1

a first embodiment of the invention in principle,

Fig.1a

Cross section of the embodiment in Figure 1 along the line II-II

Fig. 2

another embodiment of the invention,

Fig. 3

1 an embodiment of the invention with information being transmitted before the end stop has been reached,

Fig.3a

Cross section of the embodiment in Figure 3 along the line III-III, and

Fig. 4

Locking element with electromagnetic drive.

Unless otherwise stated below, the following description always applies to all figures.

The figures show a profile cylinder 1. Such a profile cylinder, as the cross-sectional drawings in FIGS. 1a, 3a show, consists of a circular cylindrical region 2 and a web-like region 3 attached thereto. The outer housing of the profile cylinder is formed in one piece. The circular cylindrical area of the profile cylinder is therefore made of the same material as the area 3 which is attached in the manner of a web.

The circular cylindrical region 2 serves to receive the rotatable closing core 4. For manufacturing reasons, the rotatable closing core 4 is rotatably mounted within a tube 5. The tube 5 is fixed within the circular cylindrical region 2. The tube 5 has radial bores which are aligned with bores of the closing core 4 and in which the tumblers 6 are inserted together with their springs.

Of essential importance for the invention is the fact that the tumblers 6 are only and in this way provided in the circular cylindrical region 2 of the profile cylinder. The tumblers actuated by the key are therefore not to be found within the area 3 set on the web.

It is known per se that tumblers 6 of this type are elastically supported and are held in a preferred position by the support elements. The preferred position is changed by inserting the key in the profile cylinder so that the tumblers along the plane of movement of the locking core 4 relative to the surrounding tube 5 are adjusted so that divisional planes of the tumbler located there enable rotation of the locking core.

Although this is known per se, reference is also made to DE 43 36 476. With regard to the features not mentioned here, the content of this application is also made the subject of the present application.

Furthermore, the figures show that the locking core 4 is penetrated in the longitudinal direction by a key channel 7. The key channel 7 has a dumbbell-like cross-sectional shape (see Fig. 1a) or a mushroom-shaped cross-sectional shape (see Fig. 3a). Consequently, the invention is not restricted to reversible keys or to so-called non-reversible keys. In any case, all types of key channel cross sections come into consideration as long as the profile cylinder has only radial tumblers in the circular cylindrical area.

It is now essential that, in addition to the tumblers 6, a locking element 8 is provided in the circular cylindrical region 2. The locking element 8 is movably guided in the web-like area of the profile cylinder. It is a pin or the like that is movable transversely to the closing core and is movably driven between a closed position 9 and an open position 10. In the locking position 8, the locking element 8 engages in the rotational mobility of the closing core in a rotationally prevented manner. In the open position, the locking element 8 releases the locking core.

For this purpose, a transverse bore is made in alignment with the guidance of the locking element 8 in the web-like area 3 of the profile cylinder 1 in the closing core 4. The tip of the locking element 8 engages in this transverse bore in the closed position. In the open position 10, however, the tip of the locking element 8 moved out of the locking core to such an extent that the positive engagement of the locking element 8 in the locking core 4 does not occur.

In the cases of FIGS. 1 to 3, the blocking element 8 is connected to a drive 11 by a drive and is driven by the drive 11 between the closed position 9 and the open position 10. For this purpose, the drive 11 consists of a stationary electric motor, e.g. a DC micromotor. The micromotor is fixed in position on the web-like area 4 of the profile cylinder.

A crank 13 is connected in a rotationally fixed manner to the motor shaft 14 of the electric motor 12. The crank 13 carries an eccentric pin 33, on which the lower end of the locking element 8 is movable. As a result of the rotary movement of the crank 13, the eccentric pin 33 is guided in a circular path around the motor shaft 14. The lower end of the locking element 8 is permanently connected to the eccentric pin 33 in a form-fitting manner. This is in turn guided in the web-like housing of the profile cylinder 1 only in the longitudinal direction, the crosshead 34 decoupling the lower part of the locking element 8 pivoting with the crank rotation from the exclusively linearly guided upper part.

It is also essential that the eccentric pin 33 can be driven so that it is moved between its top dead center position and its bottom dead center position. In this case, the locking element 8 is in the closed position when the eccentric pin 33 has reached its top dead center. The open position is given when the eccentric pin 33 has reached its bottom dead center.

The advantage of this design is that external manipulation is practically impossible. Since in the top dead center position all forces that could cause a movement of the lock 8 in the longitudinal direction go exactly through the pivot point of the motor shaft 14, manipulation of the locking element 8 is not possible.

It is also essential that the drive 11 can only be controlled as a function of information arranged on the key.

For this purpose, an information receiver 19 is provided in a fixed position on the profile cylinder 1, which interacts with an information transmitter 18 attached to the key spine 27. The interaction occurs in principle in such a way that when the information transmitter 18 drives past the back of the key on the stationary information receiver 19 of the profile cylinder, information provided on the key is scanned. If the information from the information provider matches a predetermined information, then a corresponding switching signal is transmitted to the switching relay 16 via the control unit 17. This is a general switching element, e.g. Transistor arrangement, with two stable switching states. The switching relay 16 closes the circuit between the battery 15 and the electric motor 12. The electric motor makes half a motor revolution. As a result, the locking element 8 is moved out of engagement with the locking core 4. The locking core 4 can therefore be rotated as soon as the tumblers 6 have been shifted into their release position.

In a manner known per se, such profile cylinders are fastened to the lock in the door leaf with a faceplate screw 1a. They have an area 21 on the inside of the door and an area 20 on the outside of the door. According to this invention, the area on the outside of the door should preferably carry the locking element 8 together with the associated drive 11. In a preferred further development, however, the electrical energy stores 15 are to be seated on the longitudinal region 21 of the profile cylinder on the inside of the door. This offers the advantage that the electrical energy store 15 is protected against heat even at extremely low temperatures. Since it is preferably a small battery, the functionality of the profile cylinder is fully retained even at extreme outside temperatures.

In order to prevent manipulation from the outside when the door is closed, the energy store 15 should preferably only be accessible after the forend screw has been removed. Therefore the battery can only be replaced when the door is open. If the door was closed, the faceplate screw 1a would not be accessible.

With regard to the information provider 18 on the key back 27, the following differences are pointed out.

According to Figure 1, there is a so-called reversible key. The key channel 7 is symmetrical. Such a key can be inserted into the key channel 7 in both possible upright positions.

For this reason, the information transmitter 18 is to be arranged on both key backs 27. In this case, it would be irrelevant whether the key would be inserted in the key channel 7 in one or the other upright position.

Something else applies to key cross sections according to FIG. 3. Such a key, as can be seen from the cross section of the key channel, is not symmetrical. It only has a thickening at the upper area, while the lower key channel area is web-like. In this case, the information transmitter 18 would only be attached to the back of the key 27 on the web-like back of the key.

The opposite key spine has no information transmitter 18.

There is a further difference with regard to the designs Fig. 1 and Fig. As is known, the recesses for actuating the tumblers 6 are arranged in a predetermined longitudinal region 25 of the back of the key. In the exemplary embodiment according to FIG. 1, the information transmitter 18 is attached to the front end of the key and outside of this longitudinal region 25.

In the exemplary embodiments according to FIGS. 2 and 3, the information transmitter 18 is also located inside (FIG. 2) or exclusively inside (FIG. 3) of the longitudinal region 25 with the recesses for the tumblers 6.

The advantage of this embodiment is that the overall key length can be kept very short. As a result of the various possible variations for the tumblers 6 in this type of locking cylinder, the information transmitter 18 can therefore be fitted within the longitudinal region 25 of the recesses without changing the conventional key lengths.

The information exchange between the information transmitter 18 and the information receiver 19 can take place either by mechanical scanning or preferably also without contact and thus without wear.

The fact that the locking core 4 is penetrated by a key channel 7, which breaks through the wall of the locking core 4, proves particularly advantageous where the key channel meshes with the web-like area 3 of the profile cylinder 1 in the key insertion position. All tumblers 6 are located outside of the breakthrough point 26 in so-called tumbler rows which extend along the profile cylinder.

The surface of the information receiver 19 can therefore come to lie directly below that point on the key back 27 at which the information exchange between the information provider 18 and the information receiver 19 is to take place.

The advantage lies in an unhindered exchange of information, which is not disrupted by the intervening materials, because the information carriers involved in the information exchange can be directly opposite one another.

For this purpose, the key channel 7 breaks through the wall of the locking core along a longitudinal region on the side facing the web region 3. In the area of the breakthrough 26 of the information transmitter 18 is arranged on the key back 27. The information receiver 19 is then provided in a fixed position at the corresponding location of the tube 5. When the information transmitter 18 drives past due to the insertion of the key, the information receiver 19 can therefore remove the information attached there and transmit it to the control unit 17.

1a and 3a also show that the blocking element 8 is designed in the form of a fork. It engages the locking core 4 with two fork tines 28. Each of the fork tines 28 lies on one side of the key channel 7. Here, the key channel is cut on the side. The entry openings of the fork tines are located in these two secant planes 30, 31. There, with retracting fork tines 28, the lock 8 engages in the locking core 4 in a rotationally preventing manner. The back of the key is flanked by one of the fork tines on each of its sides. The key itself blocks the rotation of the locking core when the forks are retracted. This also applies in the event that a manipulated key should have the correct mechanical coding.

In addition, the figures show the following:

Each key has an end stop 32. The end stop serves to limit the insertion length of the key into the key channel 7. When the end stop 32 has reached the end face of the locking core 4, the key has reached its insertion position. In the inserted position, the tumblers 6 are aligned with the recesses in the longitudinal region 25 on the back of the key 27. In this fully inserted position, the tumblers 6 are opened and the rotational movement of the closing core is to be released. If one now takes into account that a certain time is required from the beginning of the exchange of information between the information provider 18 and the information receiver 19 in order to open the engaged lock 8, the tumblers 6 should only be able to be actuated when the lock 8 is opened. The opening of the lock 8 should therefore take place earlier than the actuation of the tumblers 6.

For this purpose, it is proposed that the information exchange between the information provider 18 and the information recipient 19 already takes place when the key with its end stop 32 is not yet in the full insertion position. In principle, it is sufficient for the information provider and the information receiver to comb with one another in the key channel 7 prior to the insertion of the key, e.g. by sliding relative to each other. Figure 3 shows this situation at the beginning of the insertion, while Figure 2 shows this situation shortly before the end of the insertion.

In this way it is ensured that when using an approved key, the lock 8 is already open when the recesses on the back of the key actuate the tumblers 6. The rotation-preventing engagement between the lock 8 and the locking core 4 is therefore already eliminated when the key has reached its end position.

In particular, however, it is advisable to provide the information receiver 19 deep within the key channel in order to rule out possible manipulations from the outset. A further advantage then arises from the fact that tilting of the key is ruled out because the key is already inserted deep enough in the key channel 7 at the moment the information transmitter 18 slides past the information receiver 19 and thus has a reliable longitudinal guidance.

4 also shows an alternative embodiment for driving the lock 8.

In this case, the drive 11 consists of an electrical coil 35 which is penetrated by a coil core 36. The coil core is immersed in coil 35.

The coil core is displaceable in the longitudinal direction within the coil windings. In order to achieve two defined end positions, the dead center spring 37 is used. The dead center spring 37 is supported at one end on the coil core while the other end is seated stationary. Now put a voltage on the electrical coil 35, the core is linearly shifted depending on the direction of current flow to itself. In this case, the dead center spring 37 comes into its dead center position 38 in a certain position. In the dead center position 38, the dead center spring 37 has its shortest length, so that it is relaxed immediately after passing over the dead center position 38. The dead center spring is released until the lock 8 is in the opposite end position.

The advantage of this development is that a gear connection between drive 11 and lock 8 is not required. In addition, the dead center spring 37 ensures that manipulation from the outside is made more difficult.

If the lock 8 is to be moved into the opposite end position, only a reversal of the polarity of the coil connections is provided, as shown in broken lines.

Reference symbol list:

1

Profile cylinder

1a

Forend screw

2nd

circular cylindrical area

3rd

area set on the bridge

4th

Locking core

5

pipe

6

Tumblers

7

Key channel

8th

Locking element

9

Closed position

10th

Open position

11

drive

12th

Electric motor

13

crank

14

Motor shaft

15

battery

16

Switching element, transistor arrangement, bistable switching device

17th

Control unit

18th

Information provider

19th

Information taker

20th

Longitudinal area outside the door

21

Longitudinal area inside the door

25th

Longitudinal area of the recesses

26

Breakthrough

27

Key back

28

Forks

29

Push rod

30th

first secantial level

31

second secantial level

32

End stop

33

Eccentric pin

34

Cross head

35

electric coil

36

Coil core

37

Dead center spring

38

Dead center position

Claims (19)

Profile cylinder (1) with a circular cylindrical (2) receiving area and the locking core (4) and with a web-like (3) attached to it, in the circular cylindrical area (2) pointing radially towards the key channel (7) and elastically supported tumblers ( 6) are arranged, characterized in that
that in addition to the tumblers (6) in the circular cylindrical area
In the web area (3) such a movably driven locking element (8) is provided that in a closed position (9) it engages in the rotational mobility of the closing core (4) to prevent rotation and in an open position (10) releases the closing core (4), whereby
the locking element (8) can be moved by a drive (11) between the closed and open positions (9, 10) and the drive (11) can be controlled as a function of information (18) arranged on the key. Profile cylinder according to claim 1, characterized in that the locking element (8) is arranged in the longitudinal region (20) of the profile cylinder (1) provided on the outside of the door. Profile cylinder according to claim 1 or 2, characterized in that the locking element (8) is coupled to an electric drive (11) and that an electrical energy store (15) is provided on the profile cylinder (1). Profile cylinder according to claim 3, characterized in that the electrical energy store (15) is only accessible after removal of the faceplate screw (1a). Profile cylinder according to Claim 3 or 4, characterized in that the electrical energy store (15) is located on or in the longitudinal region (21) of the profile cylinder (1) on the inside of the door. Profile cylinder according to one of claims 1 to 5, characterized in that the information on access authorization is arranged in the longitudinal region (25) of the recesses for aligning the tumblers (6) on the key. Profile cylinder according to claim 6, characterized in that the information (18) is arranged exclusively within the longitudinal region (25) with the recesses. Profile cylinder according to one of claims 1 to 7, characterized in that the key is designed as a reversible key. Profile cylinder according to one of claims 1 to 7, characterized in that the key is designed as a non-reversible key. Profile cylinder according to one of claims 1 to 9, characterized in that the information transmitter (18) contains electronic information and that information exchange between the information transmitter (18) and the information receiver (19) takes place without contact by means of electromagnetic waves. Profile cylinder according to one of claims 1 to 9, characterized in that the information transmitter (18) contains electronic information and that information is exchanged by contact-based scanning. Profile cylinder according to one of claims 1 to 11, characterized in that the key channel (7) breaks through the wall of the locking core (4) and on the one hand the information carrier in the area of the breakthrough point (26) and the corresponding point of the key back (27) (18) and on the other hand the information reading device (19) are arranged. Profile cylinder according to one of claims 1 to 12, characterized in that the lock (8) engages in a fork-like manner with at least two prongs (28) in the closing core (4). Profile cylinder according to claim 13, characterized in that the tines (28) lie in different secant planes (30, 31) of the closing core (4). Profile cylinder according to claim 13 or 14, characterized in that the key channel (7) is aligned in the key withdrawal position so that the fork-shaped lock (8) engages on both sides of the key channel (7) in the locking core (4). Profile cylinder according to one of claims 1 to 15, characterized in that the information carrier (18) on the key and the information reading device (19) on the housing of the profile cylinder (1) are arranged relative to one another such that the reading of the information carrier (18) before reaching the Key end stop (32) takes place, and that the tumblers (6) are only activated when the end stop (32) is reached. Profile cylinder according to one of claims 1 to 16, characterized in that there is a gearing connection (13, 33, 34) between the blocking element (8) and the drive (11). Profile cylinder according to claim 3, characterized in that the electric drive (11) is formed by an electric coil with a coil core movable relative to it and in that the coil component connected to the locking element (8) is connected to a force accumulator (37) which is connected between the closing (9) and open position (10) passes through a dead center position (38), the coil core preferably carrying the locking element (8) at the end. Profile cylinder according to one of claims 1 to 18, characterized in that the blocking element (8) is provided independently of the number of tumblers (6) and outside the rows of tumblers.

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