EP0559158B1 - Electronic closing cylinder - Google Patents

Abstract

The electronic lock cylinder comprises a housing (1) with a cylinder core (9) which is mounted rotatably therein and which can be blocked in the conventional way by a key (15) via mechanical tumblers (21). The lock cylinder and the key (15) are assigned electronic control circuits (45, 47) which can be inductively coupled via coupling coils (43, 49) for the transmission of coding information. The coupling coil (43) of the lock cylinder is combined, together with all electronic components present within the lock cylinder and with a mounting (51), to form a constructional unit which is attached removably to one end face of the lock cylinder. In this way, the mechanical components and the electronic components of the lock cylinder can be mounted separately from one another, and the electronic components can, if appropriate, be exchanged, without the mechanical part of the lock cylinder having to be exchanged. <IMAGE>

Description

The invention relates to a lock cylinder and in particular a lock cylinder with mechanically through a Key lockable tumblers that prevent the transfer of Encryption information between an electronic Control circuit of the key and an electronic Control circuit of the lock cylinder enables.

EP-A-0 324 096 is a profile locking cylinder known, which in the usual way a profile housing and one rotatably mounted in a bore of the profile housing Cylinder core with one in the direction of the cylinder axis extending insertion channel for a flat key includes. The flat key not only controls mechanical tumblers of the locking cylinder, but contains an electronic control circuit in its grip part, via a key-side coupling coil Encryption data for one arranged on the profile housing Coupling coil transmits inductively. To the coupling coil the lock cylinder is another electronic Control circuit connected to the transmitted Evaluates encryption data and if they match the key-side encryption data with the encryption data on the lock cylinder side Control signal representing the closed state is generated. The lock cylinder includes mechanically Locks controlled by the key are electromagnetic Locking device that the cylinder core also blocked relative to the profile housing, however can be unlocked depending on the control signal.

The coupling coil of the known from EP-A-324 096 Lock cylinder is housed in a plastic holder, with one end of the profile housing Help is molded locking organs is held. The plastic bracket stands over the end face of the cylinder core before to move the coupling coil closer to the key side Bring the coupling coil housed in the key handle to be able to. For example, in a castle The plastic bracket stands for the door-mounted locking cylinder a few millimeters over the front surface of a Door signs in front of what the risk of unwanted damage and unauthorized manipulation.

The magnetic fields of the coupling coils are normally comparatively low, and also from the lock cylinder side Coupling coil generated signals are comparative small. This leads to the electronic Control circuit as close as possible to the coupling coils should be arranged to reduce signal loss and interference to mitigate. In the case of known encryption information of the key responsive electronic Locking cylinders, it is known the electronic control circuit or at least part of their components to accommodate directly in the housing of the locking cylinder. Designed in conventional lock cylinders of this type However, assembly is difficult because electronic Components and mechanical components at the same time must be installed.

It is an object of the invention to provide a locking cylinder specify whose components are assembled more easily than before can be.

The invention is based on a locking cylinder comprising a housing, at least one in a bore of the Rotatable cylinder core with an in Insert channel extending in the direction of the cylinder axis for one key, several of the key mechanically controllable tumblers, one on the housing detachably held bracket with a near the Insert channel arranged, especially as a coupling coil trained information transmission element, which in in the insertion channel with a key key-side, in particular also as a coupling coil trained information transmission element key-side electronic control circuit for Transfer of encryption information can be coupled is and to the lock cylinder side information transmission element connected, lock cylinder side electronic control circuit that depends on the transmitted encryption information to the Control signal representing the closed state in particular to control one of the cylinder core in addition to the Guard locking electromagnetic locking device generated. With a locking cylinder of this type, the The above object is achieved in that at least part of the electronic components Control circuit arranged on the housing of the lock cylinder are and that all components arranged on the housing the control circuit, the information transmission element and the bracket form a structural unit which as Unit is held detachably on the housing.

Such a design allows, at least for those Signal transmission via the coupling coils required Input and / or output stages in the immediate vicinity to arrange the coupling coil, which increases the interference immunity. In addition, the mechanical components of the Lock cylinder and the electronic components assembled separately from each other to form structural units that are only in a final manufacturing step be united. This also has the advantage that a possible defect in the electronic unit on Installation location of the locking cylinder can be changed, without the mechanical part of the locking cylinder needs to be replaced.

In a preferred embodiment of the invention, in which the housing as a profile housing of a profile locking cylinder is formed and a hole for the cylinder section containing the cylinder core and a web section projecting radially from the cylinder section includes and in which also the bracket covers at least the axial end face of the web section, it is provided that the bracket one with the Bore has an equiaxed opening into which one Extension of the cylinder core protruding from the bore engages and that the components arranged on the housing the control circuit on a cross with its plate level to the cylinder axis in the area of the end face of the web section arranged circuit board are arranged.

A lock cylinder of this type can essentially consist of conventional lock cylinder components can be built. In particular, conventional, standardized Locking cylinders are assumed, their cylinder core and to modify the profile housing only slightly is. In particular needs of standardized external dimensions conventional profile cylinder did not deviate be, so that also conventional security door fittings and door plates used to cover the locking cylinder can be. Because the bracket essentially forms the entire front surface of the profile housing they have sufficient stability and can also be permanent attach to the profile housing. The roughly parallel to the face of the web section extending circuit board records drilling attempts, since they are drilling the guard locking area being destroyed first and the destruction can be used to trigger the alarm.

The bracket, which is made of a non-magnetic material, for example made of plastic but also non-ferromagnetic Metal consists expediently one adapted to the outer contour of the web section Approach on a ring section forming the opening protrudes in the direction of the cylinder axis and a Contains pocket in which the web portion engages. A such bracket can be mechanically stable and durable attach to the profile housing, especially then if the pocket goes through on both sides of the web section Cheeks of the approach is limited, which in contour-like Indentations of the side surfaces of the web section sit and also the bracket through across the cylinder axis through the cheeks into the web section engaging, pin-shaped fastening elements on the profile housing attached, for example screwed. The contours of the cheeks that are the same shape as each other and the recesses guide the bracket positively on the web section tilt and rotation proof, so that some few fasteners, for example one fastener each on each side for permanent Attachment is sufficient.

The extension of the cylinder core engages in the opening the bracket and thus contributes to stabilization at. The extension can be made in one piece on the Be formed on the cylinder core; but it can also be dated Cylinder core to be formed separate cap on a projection formed on the front end of the cylinder core sits. The latter version has the advantage that in the manufacture of the cylinder core of conventional Cylinder cores with standardized dimensions can be assumed, since only one seat on the Cylinder core must be molded to hold it through the cap to be able to extend to the desired size without the other dimensions, especially those usually used axial guidance of the cylinder core provided ring flanges or the like would have to be changed. For the the cap has axial guidance of the cap on the profile housing expediently a radial to the cylinder axis externally protruding ring flange that between the Bracket and the cylinder section of the profile housing takes hold. It is understood that the cap is by protrusions or the like coupled non-rotatably to the cylinder core can be so that there is a provided in the cap Key insertion opening not relative to the insertion channel of the cylinder core can twist.

In the locking cylinder known from EP-A-324 096 the coupling coil sits on the end face of the cylinder and works with one housed in the handle part of the key Coupling coil together. The front of the lock cylinder must here over the end face of the cylinder core extended to the key handle to to ensure a sufficiently small coupling distance.

DE-A-40 36 575 is a further locking cylinder known, the one laterally rotatable in a housing arranged arranged cylinder core arranged coupling coil. The coupling coil sits on a U-shaped yoke, the legs of which have a key insertion channel open on both sides enclose in the cylinder core between them. In the shaft of the assigned flat key sits in the Distance from the handle part of the key is cylindrical Coupling coil, which is between the narrow sides of the Key shaft extends and when inserting the Key in the insertion channel of the cylinder core between the yoke legs of the coupling coil on the lock cylinder side to be led. A lock cylinder of this type requires a special design of the cylinder housing, and through the entire key shaft extending coupling coil weakens the key shaft strong, so that there is a risk that the key at improper handling cancels.

A preferred embodiment of the invention allows one inductive data transmission from a flat key to Lock cylinder, being essentially conventionally constructed Profile lock cylinders can be used and nevertheless, the coupling coil on the cylinder side is protected becomes. In addition, in this embodiment, a extensive mechanical weakening of the key in the area avoided his shaft.

In such a lock cylinder it is provided that Housing as a profile housing and the key as a flat key are formed that the housing-side information transmission element than in the area of an end face of the profile housing arranged coupling coil formed is the one with the key-side information transmission element forming, key-side coupling coil for the inductive transmission of the encryption information can be coupled, that the insertion channel in the area the end face of the profile housing on at least one its narrow sides radially open to the profile housing is that the locking cylinder-side coupling coil is arranged is that they are inserting the flat key in the rest position allowing insertion of the cylinder core to the narrow side opening of the insertion channel is aligned and that the key-side coupling coil one in the insertion channel in the area of the narrow side insertable section of a key shaft of the flat key is arranged.

The locking cylinder-side coupling coil is under utilization of the existing in the web section of the profile cylinder Construction space protected inside the profile housing, so they're right with one on a narrow side of the key shaft arranged on the key side Coupling coil can be coupled inductively. Since the key-side coupling coil does not pass through the key shaft extending through becomes the key shaft mechanically not weakened, and also the housing the locking cylinder-side coupling coil within standardized Prepares dimensions of a profile cylinder no difficulties.

The locking cylinder-side coupling coil is preferably on a circuit board held that at the same time at least one Part of the electronic components of the control circuit wearing. In this way it can be compared small coupling cylinder-side coupling coil easier in Mount the profile housing.

The key electronic control circuit is for a flat key, which is for a locking cylinder the above type is suitable, expediently arranged in a grip part of the flat key, wherein the key shaft in the area of the handle part a flat side widening has one of the handle part pioneering insertion stop surface. The one Counterstop of the cylinder core cooperating Push-in stop surface ensures axial adjustment the flat key relative to the mechanical tumblers of the locking cylinder. The key-side coupling coil is preferred on one in the longitudinal direction of the shaft extending narrow side of the flat side widening arranged between the stop surface and the handle part, in a place where the key shaft due to the flat side widening increased strength anyway Has. The coupling coil expediently sits in a recess in the flat side widening from which for receiving connecting cables of the coupling coil completely inside the key shaft Hole is guided to the inside of the handle part. That I the recess extends into the stop surface, can also be drilled from the stop surface be what the installation of the coupling coil in the Recess made easier. Extends to protect the coupling coil the recess does not extend into the flat sides the key shaft so that the coupling coil through Flat sidewalls is covered.

Fig. 1

eine Teildarstellung eines elektronischen Profil-Schließzylinders;

Fig. 2

eine Stirnansicht des Schließzylinders;

Fig. 3

eine Schnittansicht des Profilzylinders, gesehen entlang einer Linie III-III in Fig. 2;

Fig. 4

eine Schnittansicht des Profilzylinders ähnlich Fig. 3, jedoch mit eingestecktem, teilweise geschnittenem Flachschlüssel;

Fig. 5

eine Schmalseitenansicht des Flachschlüssels;

Fig. 6

eine Flachseitenansicht des Flachschlüssels;

Fig. 7

eine Explosionsdarstellung einer Variante eines elektronischen Profil-Schließzylinders und

Fig. 8

eine Schnittansicht des Profilzylinders aus Fig. 7.

Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. Here shows:

Fig. 1

a partial view of an electronic profile locking cylinder;

Fig. 2

an end view of the lock cylinder;

Fig. 3

a sectional view of the profile cylinder, seen along a line III-III in Fig. 2;

Fig. 4

a sectional view of the profile cylinder similar to Figure 3, but with an inserted, partially cut flat key.

Fig. 5

a narrow side view of the flat key;

Fig. 6

a flat side view of the flat key;

Fig. 7

an exploded view of a variant of an electronic profile lock cylinder and

Fig. 8

7 shows a sectional view of the profile cylinder from FIG. 7.

The profile locking cylinder shown in Figs. 1 to 4 has a profile housing 1 with a cylinder section 3, the one in a cylindrical bore 5 Includes cylinder axis 7 rotatable cylinder core 9, as well a web section projecting radially to the cylinder axis 7 11. The cylinder core 9 contains an insertion channel 13, for a generally designated 15 (Fig. 4) Flat key, which protrudes from a handle part 17 Key shaft 19 in a conventional mechanical manner Tumbler pin pairs 21 controls. The tumbler pin pairs 21 are biased by springs 23 towards the cylinder core 9 in bores 25, 27 of the web section 11 on the one hand or the cylinder core 9 on the other hand, the Bores 25, 27 in a rest position of the cylinder core 9, in which the flat key 15 is inserted or can be subtracted aligned with each other are. Fig. 3 shows the locked position of the lock cylinder with the key removed, in which the Tumbler pin pairs 21 radially over the lateral surface of the Cylinder core 9 extend into the web section 11 and block the cylinder core 9. Fig. 4 shows the Lock cylinder with flat key 15 inserted, whose key notches 29 the parting surfaces 31 of the tumbler pin pairs 21 align to the jacket of the cylinder core 9, so that it is rotated relative to the profile housing 1 can be.

In addition to the mechanical tumblers Lock cylinder by an electromagnetic locking device 33 lockable. The cylinder core 9 for example by means of a spring-loaded anchor 35 blocking locking device 33 includes a Electromagnet 37, when a control pulse is supplied actuated the armature 35 and the cylinder core 9 for the Duration of the control pulse for rotation by the flat key 15 releases.

To control the locking device 33 is the Lock cylinder an electronic generally designated 39 Control circuit associated with its main components outside the lock cylinder, for example in the area of the lock cylinder assigned Castle or outside of those locked by the castle Door or the like is arranged and over a connecting line separable by plug connections 41 with a coupling coil 43 on the lock cylinder connected is. Part of the electronic components the electronic control circuit 39 is in here immediate vicinity of the coupling coil 43 on a circuit board 45 housed in the lock cylinder to the comparatively weak signals of the coupling coil 43 to be able to process without interference.

In the handle part 17 of the key is another electronic Circuit 47 housed with an im Key shaft 19 provided further coupling coil 49 connected is. In, as shown in Fig. 4, in the Lock cylinder inserted flat key 15 are the Coupling coils 43, 49 aligned with each other and with each other inductively coupled. The control circuits 39, 47 transmit encryption information in both directions, on which the control circuit 39 depends Correspondence to the locking device 33 unlocking control pulse generated. Around the coupling coils 43, 49 to be able to come closer together is the one in the Rest position of the cylinder core 9 of the coupling coil 43 adjacent area of the narrow side of the coupling coil of the insertion channel 13 open, and the coupling coil 43 directly borders on the circumference of the cylinder core 9.

The circuit board 45 carries all lock cylinder side electronic components of the control circuit 39 and is together with the coupling coil 43 and one Bracket 51 combined into one unit, which as such is releasably attached to the profile housing 1. The mechanical components of the locking cylinder can thus assembled separately from the electronic components so that the electronic components only be added in a last step. The electronic components can also be used for one Defect can be replaced without the mechanical Components of the locking cylinder also exchanged should be.

To achieve this, it is made of plastic, for example or other non-magnetic material existing bracket 51 formed as a molded part and on the front of the profile housing 1 is placed. The Bracket 51 encloses with an opening 52 forming Ring part 53 has an end axial extension 55 of the cylinder core 9 and has the ring part 53 on the side an approach 57. The approach 57 has one with the outer contour of the web section 11 matching contour and forms between two cheeks 59, of which in Fig. 1st only one can be seen, a pocket 61 in which the web section 11 engages. The web section 11 has in its area engaging in pocket 61 contoured recess 63, which form the approach 57 encloses with their edges so that the bracket 51 largely tilt-proof on the locking cylinder is led. Pins or screws 65 fix the holder 51 in the region of the cheeks 59 on the web section 11.

The board 45 extends perpendicular to the cylinder axis 7 and overlaps the end face of the web section 11. In a drilling test in which the tumbler holes 25 are to be destroyed, the Board 45 destroyed what was an attempt at sabotage by the Control circuit 39 detects and used to trigger an alarm becomes. In addition, between the holder 51 and the tumbler pin row hardened steel pins 67 or the like as a drill protection in the web section 11 are used.

4 to 6 show details of the flat key 15, in the area of the base of his key shaft 19 one with the key inserted in extension 55 of the cylinder core 9 engaging flat side widening 69 has. The flat side widening 69 forms from the handle part 17 directed away a stop surface 71, the Key for the mechanical locking of the locking cylinder on a counter stop surface 73 (FIG. 4) of the Cylinder core 9 fixed. The stop surfaces 71, 73 also ensure the alignment of the coupling coils 43, 49. The coupling coil 49 sits in one of the stop surface 71 and to the narrow side 75 open recess 77 of the Flat side widening 69, with their connecting lines to the control circuit 47 through a bore 79 are guided, starting from the recess 77 completely runs inside the key shaft 19. The Bore 79 runs obliquely to the longitudinal direction of the shaft. To The cutout 77 is the flat sides of the shaft 19 delimited on both sides by flat side walls 81, which protect the coupling coil 49 laterally. It understands yourself that the coupling coil 49 shed in the recess 77 can be. Likewise, the coupling coil 43 with the Bracket 51 and possibly the circuit board 45 be shed.

The profile lock cylinder of FIGS. 7 and 8 differs differs from the locking cylinder explained above just by designing the insertion side of his Cylinder core. Components with the same effect are therefore with the reference numerals of FIGS. 1 to 6 and Mark the distinction with the letter a. In order to explain the structure and mode of operation is based on the Description of FIGS. 1 to 6 referenced. The key side Components are not in Figs. 7 and 8 shown, but available. The same applies to components 33 to 39.

While the axial extension 55 of the locking core 9 in Fig. 3, the ring member 53 of the bracket 51 on the whole Penetrating deep is the extension 55a of the cylinder core 9a of the lock cylinder of FIGS. 7 and 8 shorter formed so that the extension 55a by a Calibration of a conventional cylinder core with standard dimensions can be manufactured. On the extension 55a is one in her bottom and at least one of her Side walls with a key insertion slot Cap 83 placed on the extension 55a to Outside of the bracket 51a further extended. The cap 83 carries a completely circumferential, radially protruding Ring flange 85, which is in an annular groove between the Ring part 53a and the cylindrical portion 3a of the profile housing 1a engages and cap 83 is axially fixed. Not a projection of the cap 83 is shown, which in the Insert channel 5a of the cylinder core engages and the Cap 83 is rotatably fixed to the cylinder core 9a.

Claims (11)

1. A lock cylinder comprising

   a housing (1),

   at least one cylinder core (9) disposed rotatably in a bore (5) of the housing (1) and having a keyway (13) extending in the direction of the cylinder axis (7) for insertion of a key (15),

   a plurality of tumblers (21) mechanically controllable by the key (15),

   a detachable mounting (51) on the housing (1) with an information transmitting element (43), in particular a coupling coil, which is disposed in the vicinity of the keyway (13) and which, upon insertion of the key (15) into the keyway (13), is capable of being coupled with a key-side information transmitting element (49) of a key-side electronic control circuit (47), in particular likewise a coupling coil, for transmission of coding information, and

   a lock-cylinder-side electronic control circuit (39) which is connected to the lock-cylinder-side information transmitting element (43) and which, as a function of the transmitted coding information, generates a control signal representing lock status, in particular for control of an electromagnetic locking means (33) locking the cylinder core (9) in addition to the tumblers (21),

   characterized in that

   at least some of the components of the electronic control circuit (39) are disposed on the housing (1), and

   in that all the components of the control circuit (39) on the housing (1), the information transmitting element (43), and the mounting (51) form a structural unit which, as a structural unit, is removably attached to the housing (1).
2. The lock cylinder of claim 1, wherein the housing is a profile housing (1) of a profile lock cylinder, comprising a cylinder section (3) including the bore (5) for the cylinder core (9) and a root section (11) projecting radially from the cylinder section (3), and wherein the mounting (51) covers at least the axial front face of the root section (11),
   characterized in that

   the mounting (51) has an opening (52) coaxial with the bore (5) into which engages an extension (55; 55a, 83) of the cylinder core (9) projecting from the bore (5), and

   in that the components of the control circuit (39) on the housing (1) are disposed on a circuit board (45) in the region of the front face of the root section (11), with the plane of the board being transverse to the cylinder axis (7).
3. The lock cylinder of claim 2, characterized in that the mounting (51) has an offset (57) adapted to the outside contour of the root section (11), which projects in the direction of the cylinder axis (7) over an annular section (53) forming the opening (52) and includes a pocket (61) in which the root section (11) engages.
4. The lock cylinder of claim 3, characterized in that the pocket (61) is delimited on both sides of the root section (11) by side walls (59) of the offset (57) which are disposed in like-contoured depressions (63) of the side faces of the root section (11), and in that the mounting (51) is attached to the profile housing (1) by pinlike fastening elements (65) engaging in the root section (11) transverse to the cylinder axis (7) through the side walls (59).
5. The lock cylinder of any one of claims 2 to 4, characterized in that the extension (55) of the cylinder core (9) engaging in the opening of the mounting (51) is integral with the cylinder core (9).
6. The lock cylinder of any one of claims 2 to 4, characterized in that the extension engaging in the opening (52a) of the mounting (51) is a cap (83) separate from the cylinder core (9a) and disposed on a projection (55a) on the front end of the cylinder core (9a).
7. The lock cylinder of claim 6, characterized in that the cap (83) has an annular flange (85) projecting radially outward from the cylinder axis (7a), which engages between the mounting (51a) and the cylinder section (3a) of the profile housing (1a) and fixes the cap (83) axially.
8. The lock cylinder of any one of claims 1 to 7, characterized in that

   the housing is a profile housing (1) and the key is a flat key (15),

   in that the housing-side information transmitting element is a coupling coil (43) disposed in the region of a front face of the profile housing (1) and capable of being coupled with a key-side coupling coil (49) forming the key-side information transmitting element for inductive transmission of the coding information,

   in that the keyway (13) in the region of the front face of the profile housing (1) is open radially toward the profile housing (1) on at least one of its narrow sides,

   in that the lock-cylinder-side coupling coil (43) is disposed such that, in the rest position of the cylinder core (9) permitting insertion of the flat key (15) into the keyway (13), the coupling coil (43) is aligned toward the narrow-side opening of the keyway (13), and

   in that the key-side coupling coil (49) is disposed in the region of the narrow side of a section of a key shank (19) of the flat key (15) capable of insertion into the keyway (13).
9. The lock cylinder of claim 8, characterized in that the lock-cylinder-side coupling coil (43) is on a circuit board (45) which also bears at least some of the electronic components of the lock-cylinder-side control circuit (39).
10. A flat key for a lock cylinder as claimed in claim 8 or 9, wherein a key-side electronic control circuit (47) is disposed in a bow section (17), and a key shank (19), in the region of the bow section (17), has a flat-side widening (69) forming an insertion-stop face (71) directed away from the bow section (17),
    characterized in that
    a key-side coupling coil (49) is disposed on a narrow side of the flat-side widening (69), extending in the longitudinal direction of the shank, between the stop face (71) and the bow section (17).
11. The flat key of claim 10, characterized in that the key-side coupling coil (49) is disposed in a recess (77) of the flat-side widening (69), from which a bore (79) entirely within the interior of the key shank (19) connects to the interior of the bow section (17), for receiving connecting lines of the coupling coil (49).

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