EP0159494A1 - Cylinder lock and flat key therefor - Google Patents

Abstract

1. Cylinder lock with a core (3) rotatably mounted in the housing (1) in particular of a profiled cylinder, having a profiled key channel (5) for receiving a correspondingly profiled flat key (6) and several radially displaceable core pins (4) actuatable from incisions (6'') present at the front, which cooperate with correspondingly positioned spring-loaded housing pins (2) and with an axis-parallel blocking strip (12) mounted in a radially displaceable manner in the core (3) and engaging in an internal circumferential recess (15) in the housing, which is blocked by control elements (8) moving against the action of a spring in a plane running transversely of the cylinder axis, which project laterally into the key channel (5) and can be entered by the flat key (6), or is released for its radial entry movement into the core, characterized in that the control elements are formed as two-armed control levers (8) rockably mounted on a common pivot pin (10) running parallel to the key channel (5), the ends of which (8**IV) facing away from the key channel (5) cooperate with the blocking strip (12), where at least one of the control levers (8) is formed as the blocking strip (12) of counter-control levers (8a) exerting a blocking or releasing action in the opposite direction.

Description

The invention relates to a locking cylinder with a core rotatably mounted in the housing, in particular a profile cylinder, which has a profiled key channel for receiving a correspondingly profiled flat key and a plurality of radially displaceable core pins which can be acted upon by cuts on the chest side thereof and which interact with correspondingly arranged spring-loaded housing pins. and with a radially displaceable core, which engages in an inner circumferential recess in the housing and runs parallel to the axis, blocking the control elements which are movable in a plane transverse to the cylinder axis counter to spring action and protrude laterally into the key channel and can be acted upon by the flat key, or for their radial entry movement to be released into the core. Furthermore, the invention relates to a flat key suitable for this locking cylinder.

A lock cylinder of the aforementioned type is known from DE-OS 30 14 183, Fig. 13. Such locking cylinders with their locking pins in addition to the tumbler pins, which can also be moved radially via the control elements to be actuated by the flat key, significantly increase the security against unlocking. The axially continuous and with the corresponding inner circumferential recess in the housing engaging locking bar also compared to other, for example according to DE-OS 29 47 402 known locking cylinders with a plurality of radially displaceable individual short lock cylinders respectively assigned to the individual control elements, the advantage that the locking bar is essential is able to absorb larger torsional forces and therefore offers better protection against torsion of the cylinder core when attempted to break open by unauthorized persons. In the known locking cylinder with a continuous locking bar, the control elements located between it and the key channel consist of spring-loaded scanning bolts, which are accommodated in corresponding stepped bores in the core and are provided with a bevelled constriction on both sides, into which a circular cylindrical cross-section is obtained in the corresponding position brought about by the appropriate flat key possessing locking bar can occur when the cylinder core is rotated. However, this requires a still relatively stiff design of the control elements actuating the locking bar, because not only the sliding friction force of the scanning bolts, but also the static friction between their constrictions and the locking bar must be overcome to adjust them. The insertion of the flat key is also carried out accordingly correspondingly difficult to set return springs of the locking pin, especially since the latter have a relatively wide adjustment stroke. After all, this known locking cylinder, with its scanning bolts either blocking or releasing the continuous control bar, offers, in addition to its conventional pin tumblers, an additional variation option, which is particularly desirable for locking systems.

Such an additional variation possibility also exists for a lock cylinder according to DE-PS 20 03 059 of which the cylinder core in addition to the cooperating with housing pins _K ernstiften contains additional cross displaceable to the introduced flat key lock pins with thickened formed, semi-spherical heads into corresponding recesses in the Protrude inside the housing and thereby block the core additionally. On the other hand, these locking pins can enter these recesses when a suitable key is inserted, which is provided with dome-shaped recesses in profile thickenings on both sides, and thereby enable the core rotation. _However , since the locking pins are acted on directly by the flat key, they can easily leave pressure marks in the key when the wrong key is used when the core is twisted, which reveals their positions in the cylinder and the wrong key can be corrected accordingly. In addition, these additional locking pins fail if the false key is milled flat in the locking pin area or if a false key with a correspondingly narrower shaft profile is used from the outset. Otherwise, the dome-shaped cutouts intended for the locking pins are located here already in the transition area to the key cuts, which can easily lead to correspondingly disruptive overlaps.

The last-mentioned risk does not exist in a lock cylinder of a similar design according to DE-PS 24 11 362, since here the additional locking pins are moved more to the outside, that is to say closer to the peripheral section of the key channel. However, in order to arrange these additional locking pins on the key, there are additional longitudinal ribs projecting laterally beyond its normal profile, which are very disruptive when the key is used in practice. In addition, these projecting additional longitudinal ribs on the key can also be easily removed, as a result of which the additional effect of the locking pins would be lost again.

The invention is based on the object to improve and perfect a lock cylinder of the type mentioned in such a way that it has an even greater security against unauthorized unlocking and key falsification with increased possibility of variation and, above all, a lighter version with a solid, fault-resistant and wear-resistant design Actuation or possibility of turning the cylinder core when using the appropriate flat key allows. It should also be ensured that such locking cylinders can easily be retrofitted in existing conventional locking systems in order to expand the latter accordingly. This object is achieved on the basis of a locking cylinder of the type in question according to the invention in that the control elements tilt as a common axis bolt running parallel to the key channel Movable, two-armed control levers are formed, the ends of which, remote from the key channel, interact with the locking bar, at least one of the control levers being designed as a counter-control lever blocking or releasing the locking bar in opposite directions. The control levers lying one behind the other in the key channel direction and bearing on the correspondingly running axle pin with low friction can be pivoted comparatively easily into their position releasing the continuous locking bar for the rotation of the core by means of the suitable flat key. In this case there is also the advantageous possibility to achieve a low-priced Hubübersetzüngsverhältnis by the appropriate arrangement of the axle in relation to the opposite control ends of the control lever, at the end facing even small Verstellhüben to the inserted flat key _S expensive lever ends a correspondingly larger blocking or release stroke on other end of the control lever can be achieved. For this purpose, the distance effective for the tilting movement of the control lever between the axle bolt and the ends of the control lever projecting into the key channel is advantageously to be selected shorter than the distance between their other ends and the axle bolt. It is also essential for the invention that at least one of the control levers is designed as a counter-control lever, which, like the control levers, cannot be brought into the tilting position releasing the locking bars by a correspondingly located lateral recess in the flat key, but rather by a position in the key located at a corresponding point , consciously not existing lateral recess must be tilted in the opposite direction. This brings an additional unlocking protection against possible flat grinding of the key on it longitudinal center containing side depressions. Finally, the core is blocked by the tilting control elements even in its rest position when the flat key is inserted, which is not provided with proper lateral recesses, i.e. not only after an initial core rotation, such as with the lock cylinder according to DE-PS 20 59 523, which otherwise necessitates changing the Lock bit and the associated disadvantages, such as its freewheel in the mortise lock and the need to take greater care when installing the cylinder.

According to a further feature of the invention, the control levers are provided at their ends projecting into the key channel with control lugs which can be varied in the axial direction and have different profiles. As a result, the control levers provide an additional third variation option in addition to the two other variation options provided by the tumbler pins on the one hand and the profiling of the key channel on the other.

The control levers are advantageously accommodated in segment-milled receiving slots in the cylinder core and are themselves designed in the manner of a disk segment, with their curved rear surface of the cylinder housing wall and with their chest surface which extends straight up to the projecting control lug facing the key channel, a correspondingly arranged bearing hole for the continuous axle bolt and underneath have a recess for a compression spring lying therein, which is supported on the bottom of the receiving slot of the cylinder core, and are provided at their lower end with a radially projecting locking cam control edge for the locking bar. While the radially projecting locking cam is on the outside of the control levers, it is on the inside of the counter-control levers.

The flat key belonging to the lock cylinder designed according to the invention is from the z. B. by the already mentioned DE-PS 20 03 059 known genre insofar as its shaft is provided with profile ribs and / or grooves present on both sides, has a continuously wide guide back and incisions on the opposite chest side for arranging the cylinder core pins and laterally has recesses for additional locking elements of the cylinder core engaging therein. According to the invention, the lateral depressions consist of circular segment-shaped millings which are concentric to an axis extending parallel to the key axis and which lie outside the incision area near the back of the key. This ensures that the milled keyways cooperating with the control levers of the locking cylinder can neither be falsified by the incisions thereof nor require a modification of the broad, smoothly running guide back of the key. In addition, these side millings can also have a differently designed and / or displaced profile in the axial direction, which results in corresponding additional variation possibilities.

The side millings in the profile adjacent to the guide groove of the key are advantageous hump provided, which is opposite a trough on the other key side. In this way, the flat key is deliberately weakened to such an extent that on the one hand it is still of sufficient strength due to the normal profile thick points remaining between the cutouts, but on the other hand it would become too thin and thus unusable in the event of any longitudinal surface grinding in this cutout area.

Finally, according to a further embodiment variant of the invention, the counter-control lever or levers can also be provided with a built-in permanent magnet at their control nose end, the associated flat key containing one or more built-in permanent magnets at the corresponding points instead of the milled grooves otherwise present there, each corresponding to the Cylinder core on its counter-control levers located opposite magnets are poled opposite. In this way, when the flat key is inserted into the key channel of the locking cylinder, there is a corresponding repulsive tilting movement of the counter-control lever, which is thereby able to release the locking bar which would otherwise be blocked by it.

• Fig. 1 und 2 einen in Höhe eines Steuerhebels verlaufenden Querschnitt durch einen Profilschließzylinder mit in Freigabe- bzw. Blokkierstellung befindlichem Steuerhebel,
• Fig. 3 und 4 in Höhe eines Gegensteuerhebels verlaufende Querschnitte durch den gleichen Schließzylinder,
• Fig. 5 eine Teilansicht auf den zugehörigen profilierten Flachschlüssel,
• Fig. 6 einen Teilschnitt nach der Linie VI - VI der Fig. 1 und
• Fig. 7 und 8 zwei entsprechende Querschnittsdarstellungen durch einen mit einem oder mehreren eingebauten Permanentmagneten versehenen Schließzylinder bei eingeführtem Flachschlüssel in der Freigabe- bzw. Blockierstellung des Gegensteuerhebels.

Several exemplary embodiments according to the invention are shown in the drawing. Show:

• 1 and 2 a cross-section running at the level of a control lever through a profile lock cylinder with the control lever in the release or blocking position,
• 3 and 4 in the amount of a counter-control lever cross sections through the same lock cylinder,
• 5 is a partial view of the associated profiled flat key,
• Fig. 6 is a partial section along the line VI - VI of Fig. 1 and
• 7 and 8 two corresponding cross-sectional representations through a locking cylinder provided with one or more built-in permanent magnets with an inserted flat key in the release or blocking position of the counter-control lever.

The profile lock cylinder shown in FIGS. 1 to 4 and 6 has a cylinder housing 1 with tumbler pins 2 which are slidably mounted in its profile web 1 'in corresponding bores 1 "and are under spring tension. The core 3 is rotatably mounted in the housing 1 radially running bores 3 ', the core pins 4, which cooperate with the housing pins 2, are displaceably mounted. In the extension of the core pin bores 3', the profiled key channel 5 is provided in the core 3, which is used for inserting the correspondingly profiled flat key 6, which with its conventionally wide-area, continuously smooth The rounded, rounded back 6 'finds a well-guided receptacle in the correspondingly profiled, non-narrowed peripheral section 5' of the key channel. The tumbler pins can be found in the notches 6 '' (see FIG. 5) on the opposite chest side of the key 6 2, 4 are classified so that they come with their mutual contact into the separating cylinder surface 7 between the core 3 and the housing 1, whereby the core 3 would lose its blockage in this regard.

However, there is an additional blocking of the core in the form of a plurality of control levers 8 lying one behind the other in its longitudinal direction, which in seg Mentally milled receiving slots 3 "of the core 3 are accommodated and are themselves designed in the manner of a disk segment. These control levers 8 are mounted such that they can be tilted via their essentially centrally arranged bearing bore 9 on a common axle bolt 10 running parallel to the key channel 5. They protrude with their upper control lugs 8 'formed ends in the key channel 5 near its unconstrained peripheral section 5', specifically here directly below the relevant guide rib 5 "into the key channel, at least in the rotational position shown in FIG. 1, in which it can be seen through the recess 8 ''lying compression spring 11 are held, which is supported on the bottom 3 "' of the receiving slot 3". With their back surface, the control levers 8 face the cylinder housing wall, while their breast surfaces, which extend in a straight line except for the control lugs 8 ', face the key channel 5 or the slot base 3 "'. The receiving slots 3" are arranged offset with respect to the core pins 4, so that the latter can be supported when the core 3 is rotated on its partition walls 14 located between the slots 3 ".

At their lower ends, the control lever 8 are provided with a control edge 8 ''', the outwardly lockiernocken in the radially projecting _B 8 ^IV passes. In this way, the control levers 8 cooperate with a common axially parallel locking bar 12, which is supported in essentially rectangular recesses 13 in the partition walls 14 of the core 3 so as to be radially displaceable to a limited extent. This locking bar 12 normally protrudes into the curly-shaped and corresponding axially parallel locking recess 15 present in the inner wall of the housing 1. For manufacturing reasons, one is symmetrical to the locking recess 15 in profile double cylinders further correspondingly designed locking recess 15 'is provided on the opposite side of the housing 1.

When the suitable key 6 has been removed or also inserted, the control levers 8 assume the rotational position shown in FIG. 1, in which they protrude with their control lugs 8 'into the key channel or into corresponding lateral millings 6''' located in the key 6 '. The core 3 can then be rotated by means of the appropriate key, which has correctly arranged the tumbler pins 2, 4 with its incisions 6 ″ on the chest side, the locking bar 12 being able to radially escape from the locking recess 15 in the housing 1. If, on the other hand, as shown in FIG. 2, a wrong flat key 6a, which is not provided with a correspondingly arranged lateral milling 6 ''', is inserted, which would indeed be provided with matching incisions 6 "which correctly arrange the pins 2, 4, the could nevertheless Core 3 can not be rotated, since the locking bar 12 is then blocked by the corresponding tilted control lever 8 and the locking cam 8 ^IV lying behind it against radial evasion.

In order to prevent the locking cylinder from being opened by a false key provided with suitable incisions and profiles, but continuously flat ground in the area of its lateral millings 6 ''', at least one of the control levers described above is designed as a counter-control lever 8a. This counter control lever 8a shown in FIGS. 3 and 4 differs from the control lever 8 shown in FIGS. 1 and 2 solely in that its locking cam 8 ^IV located at the lower end is not on the outside but on the inside. As a result, that this blocking cam 8 ^IV in the in _F ig. 4 imitation key 6b shown, provided with the wrong lateral milling, lies behind the locking bar 12, on the other hand if the key 6 is properly procured, deliberately not provided with a milling at the relevant lateral position 6 ^IV, and the consequent opposite tilting movement of the counter control lever 8a into the in Fig. 3 shown, the locking bar 12 releasing position.

As shown in FIGS. 5 and 6 in particular, the control levers 8 on their control lugs 8 ′ projecting into the key channel and consequently interacting with the inserted key 6 can be correspondingly differently profiled in the axial direction, the lateral millings 6 ″ ″ in the key 6 Have differently designed and / or shifted profiles in the axial direction. This profile, as the full and dash-dotted lines in FIGS. 5 and 6 show, can be varied or shifted accordingly. In any case, the lateral depressions 6 ″ ″ in the key 6 consist of mill segment-shaped millings which are concentric to an axis extending parallel to the key axis and which lie outside the incision area 6 ″ in the vicinity of the key back 6 ′ rest with at varying profile ribs 6 ^V _bz w _P rofilnuten 6 ^VI provided corresponding to the profiling of the key channel 5 the lateral millings are 6vi advantageous in which the guide groove u 6 ^VII of _{Schl s} -.. sels adjacent _P rofilbuckel 6 ^VIII, which on the other side of the key profile trough 6IX opposite _(F ig. 1). the consequent weakening of the key 6 in these Einfräsungsstellen 6 '''is carried out from the earlier reasons set out above.

In the embodiment shown in FIGS. 7 and 8, a permanent magnet 16, which may have the north-south polarity indicated by the letters S, N, is installed on the counter-control lever 8b at the control nose end thereof. At a corresponding point in the key 6c there is also a permanent magnet 17, but of opposite polarity. As a result, when the appropriate key 6c is inserted, the counter control lever 8b is pushed off and tilted into the release position shown in FIG. 7, in which its blocking cam 8 ^IV releases the locking bar 12 for its radial evasive movement when the core 3 is rotated. If, however, a true, provided with matching incisions 6 ", however, no permanent magnet located at the corresponding position inserted 17-tasting false key 6d into the key channel, the counter-control lever 8b remains in its in _F ig. Rotational position shown in Figure 8 in which it with its blocking cam 8 ^IV the locking bar 12 and thus also blocked the core 3.

Claims (11)

1.Clock cylinder with a core rotatably mounted in the housing, in particular a profile cylinder, which has a profiled key channel for receiving a correspondingly profiled flat key as well as a plurality of radially displaceable core pins which can be acted upon by the cuts on the chest side thereof and which cooperate with correspondingly arranged spring-loaded housing pins, and with an im Core radially displaceably mounted, engaging in an inner circumferential recess in the housing, axially parallel locking bar, which by moving in a plane transverse to the cylinder axis against spring action to block, laterally protruding into the key channel and acted upon by the flat key, or to release them for their radial entry movement into the core is characterized in that the control elements are mounted on a common axle bolt (10) which runs parallel to the key channel (5) and has two arms GE control lever (8) are formed, the ends of the key channel (5) facing away (8 IV cooperate with the locking bar (12), at least one of the control lever (8) as the locking bar (12) counter-blocking or releasing counter-control lever (8a) is. 2. Lock cylinder according to claim 1, characterized in that the control levers (8) are provided at their ends projecting into the key channel (5) with axially varying, correspondingly differently profiled control lugs (8 '). 3. Lock cylinder according to claim 1 or 2, characterized in that the control levers (8) in segment-shaped milled receiving slots (3 ") of the cylinder core (3) and themselves are designed like a segment of a disc, with their curved back surface of the cylinder housing wall and with it except for the protruding control nose (8 ') rectilinear chest surface facing the key channel (5), a substantially centrally arranged bearing hole (9) for the axle pin (10) passing through and underneath a recess (8 ") for a lying on the floor (3 ''') of the receiving slot (3 ") of the cylinder core (3) have supportive compression spring (11) and at its lower end with a radially projecting locking cam (8 ^IV ) having control edge (8''') for the locking bar ( 12) are provided. 4. Lock cylinder according to claim 3, characterized in that the radially projecting _B locking cam (8 ^IV ) on the control levers (8) on the outside, however, is provided on the one or the counter-control levers (8a) inside. 5. Lock cylinder according to one of claims 1 to 4, characterized in that the counter-control lever (s) (8a) are provided with a built-in permanent magnet (16) at their control nose end. 6. Lock cylinder according to claim 3, characterized in that the existing in the cylinder core (3) receiving slots (3 ") for the disk-segment-like control lever (8) with respect to the core pins (4) are arranged offset. 7. Flat key for locking cylinder according to one of claims 1 to 6, the shaft of which is provided with profile ribs and grooves on both sides, a continuous, broad, smooth guide back and, on its opposite chest side, notches for arranging the cylinder core pins and laterally located recesses for additional engaging therein Has locking elements of the cylinder core, characterized in that the lateral recesses consist of circular segment-shaped millings (6 '' ') which run concentrically to an axis extending parallel to the key axis and which are outside the incision area (6 ") in the vicinity of the key back (6') ) lie. 8. Lock cylinder according to claim 1, characterized in that the effective for the tilting movement of the control lever (8) distance between the axle bolt (10) and in the key channel (5) projecting ends (8 ') of the control lever (8) shorter than that Distance between the other ends (8 IV and the axle pin (10). 9. Flat key according to claim 7, characterized in that the lateral millings (6 '' ') have a differently designed and / or shifted profile in the axial direction. 10. Flat key according to claim 7 or 8, characterized in that the lateral millings (6 ''') in which the guide groove (6 ^VII ) of the key (6) adjacent profile boss (6 ^VIII ) are provided, the one on the other key side Profile trough (6 ^IX ) is opposite. 11. Flat key according to one of claims 7 to 9, characterized in that it contains one or more built-in permanent magnets (17) instead of one or more millings (6 '' '), each of which in the cylinder core (3) at a corresponding point in the counter-control levers (8b) located permanent magnets (16) are polarized opposite.

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