EP0237799B1 - Cylinder lock - Google Patents

Abstract

In the cylinder lock, axial slots are provided in the core of the cylinder. These slots either accommodate a springless additional blocking pin or double-arm blocking levers which have on each arm a blocking projection for engagement in each case with one blocking projection recess of the cylinder core borehole. The additional blocking pins and the blocking levers are controlled by lateral surface regions of the key which are varied in level. <IMAGE>

Description

The invention relates to a lock cylinder comprising a lock cylinder housing, in particular a lock cylinder housing with a HAHN profile, a lock cylinder core rotatably mounted in a cylinder core bore of the lock cylinder housing with a key channel for receiving an adapted key, spring-loaded pin tumblers with spring-loaded housing pin receptacles accommodated in housing bores and associated core bore pins accommodated in housing bores. by means of toothing of the key chest-controlled core pins and additional tumblers located axially between successive pin tumblers, which are controlled by level-varied side surface areas of the key and interact with recesses in the inner circumferential surface of the cylinder core bore, in such a way that the lock cylinder core is provided with additional locking pin holes for receiving springless additional locking pins serving as additional tumblers, which are controlled with their end near the key by an additional locking pin-controlling, level-varied side surface area of the key, with their respective end remote from the key channel, each with a locking pin recess in the Circumferential surface of the cylinder core bore cooperate like a cam and can be disengaged from the respective additional locking pin recess by adjusting the key by turning the locking cylinder core.

From the French publication 2 280 772 (utility model 74 27 050) a lock cylinder of the type mentioned is known, in which the lock cylinder core is provided on both sides of the key channel with slots spaced in the axial direction, essentially perpendicular to the cylinder core axis. These slots accommodate double-arm locking levers, which are pivotably mounted about a locking lever pivot axis parallel to the cylinder core axis, each have a locking projection on both arms for engaging in a locking projection recess on the inner circumferential surface of the cylinder bore, on one arm in control connection with a locking lever-controlling, level-varied side surface area of the key stand, are spring-loaded in the sense of maintaining this control connection and can be lifted out of both locking projection recesses by means of the adapted key with both locking projections.

From German patent specification 20 03 059 it is known to provide the locking cylinder core with additional locking pin bores in a locking cylinder of the type described at the outset, which are occupied by springless additional locking pins; These additional locking pins are controlled with their end near the key by an additional locking pin controlling, level-varied side surface area of the key and interact with their respective end remote from the key channel with a locking pin recess in the circumferential surface of the cylinder core bore in a cam-like manner and are disengaged from the respective locking pin recess when the key is adjusted by turning the lock cylinder core.

From EP-A 0067 388 it is known to accommodate spring-loaded pin tumblers and additional locking pins in corresponding bores in a lock cylinder in one and the same plane perpendicular to the lock cylinder axis. The additional locking pins are in the case of an adapted key so that the housing-side tumbler pins slide over recesses of the lock cylinder core when the lock cylinder core is rotated, while if the key is not suitable, the housing-side tumbler pins hook into the boundary edges of the recesses of the lock cylinder core and the further rotation of the lock cylinder. The recesses are therefore intended to interact with the tumbler pins on the housing and not to accommodate additional supplementary tumblers in addition to the additional locking pins already mentioned.

The invention has for its object to provide a lock cylinder which differs from the known lock cylinders by a greater possibility of variation of lock cylinders of the same basic type and is more difficult for an unauthorized person to see through and more difficult to solve.

• a) der Schließzylinderkern mindestens auf einer, vorzugsweise auf beiden Seiten des Schlüsselkanals mit in Achsrichtung beabstandeten im wesentlichen senkrecht zur Zylinderkernachse gelegenen Schlitzen versehen ist;
• b) diese Schlitze zur Aufnahme von Doppelarmsperrhebeln ausgehildet sind, welche um eine zur Zylinderkernachse parallele Sperrhebelschwenkachse schwenkbar gelagert sind, an beiden Armen je einen Sperrvorsprung zum Eingriff in je eine Sperrvorsprungausnehmung an der Innenumfangsfläche der Zylinderkernbohrung aufweisen, an einem Arm in Steuerverbindung mit einem sperrhebelsteuernden, niveauvariierten Seitenflächenbereich des Schlüssels stehen, federbelastet im Sinne der Aufrechterhaltung dieser Steuerverbindung sind und durch den angepaßten Schlüssel mit beiden Sperrvorsprüngen aus beiden Sperrvorsprungausnehmungen aushebbar sind;
• c) die Zusatzsperrstiftbohrungen mit ihren Bohrungsachsen annähernd in jeweils einer Schlitzmittelebene liegen und die jeweiligen Schlitzseitenflächen zylindersegmentförmig anschneiden;
• d) diejenigen Zusatzsperrstiftbohrungen, welche mit von Doppelarmsperrhebeln nicht besetzten Schlitzen zusammenfallen, mit federlosen Zusatzsperrstiften besetzbar sind.

To solve this problem it is provided that

• a) the lock cylinder core is provided on at least one, preferably on both sides of the key channel with slots spaced in the axial direction and substantially perpendicular to the cylinder core axis;
• b) these slots are designed to accommodate double-arm locking levers, which are pivotably mounted about a locking lever pivot axis parallel to the cylinder core axis, each have a locking projection on both arms for engaging in a locking projection recess on the inner circumferential surface of the cylinder core bore, on one arm in control connection with a locking lever controlling stand level-varied side surface area of the key, are spring-loaded in the sense of maintaining this control connection and can be lifted out of both locking projection recesses by the adapted key with both locking projections;
• c) the additional locking pin bores with their bore axes lie approximately in a slot center plane and cut the respective slot side surfaces in the form of a cylindrical segment;
• d) those additional locking pin holes which coincide with slots not occupied by double arm locking levers can be filled with springless additional locking pins.

According to one embodiment of the invention, which is characterized by the highest safety value, it is provided that the two locking lever projections are only disengaged from the respective locking projection recess at a single pivoting angle position of the double arm locking lever, i.e. both are at the same time approximately flush with the inner circumferential surface of the cylinder core bore. This embodiment is also suitable for locking systems. This embodiment is of particularly high safety value because it is not or only extremely difficult to bring all the locking levers into their only one angular position at a time, in which the rotation of the cylinder core is released, by means of a needle or a comparable auxiliary instrument.

The control connection between the double-arm locking lever and the locking lever-controlling, level-varied side surface area of the key can in each case be established by means of a control pin which is received by a control pin bore connecting the respective slot base with the key channel. This embodiment offers inter alia the advantage that the slots themselves do not have to be brought up to the key channel, so that the slot in the cylinder core can be made in a simple form and does not lead to excessive weakening of the cylinder core. In addition, the embodiment with control pins opens up the possibility of using the same locking lever and the variations in adapting to different release levels of the level-varied side surface area of the key can be achieved by correspondingly different control pin lengths with regard to the smallest possible number of different components of the locking cylinder.

In the case of the design with control pins, it is recommended that the diameter of the control pin bore is larger than the slot width and that the two slot side surfaces cut like a cylinder segment. In this way, an extended guidance of the control pins can be achieved in order to avoid undesired canting, and moreover the control pin bores can be drilled with an enlarged diameter in order to simplify production.

For the spring loading of the double-arm locking lever, it is proposed as a further development that a double-arm locking lever is acted upon by a helical compression spring which is received by a spring bore that cuts the slot side surfaces of the respective slot and / or the slot base. This design is desirable with a view to simple assembly of the locking cylinder.

In principle, it would be conceivable to use the same level-varied side surface areas of the key for controlling the locking levers and the additional locking pins. With a view to expanding the possible variations The locking behavior of different locking cylinders, however, it is advantageous if the locking lever-controlling, level-varied side surface areas of the key and the level-varying, additional locking pin-controlling side surface areas of the key lie at different distances from the key back. It is recommended that the locking lever-controlling, level-varied side surface areas of the key are closer to the key back than the additional locking pin-controlling, level-varying side surface areas of the key. On the one hand, this embodiment provides for an extended guidance of the additional locking pins in the associated additional locking pin bores, on the other hand, it enables a desired enlargement of the double arm locking lever, which in turn leads to simplified handling during assembly.

In order to simplify the production of the locking cylinder, it is recommended that several, preferably all slots on at least one side of the key channel are each penetrated by a bearing pin common to a plurality of double-arm locking levers.

It was already indicated above that equality of the double arm locking levers with one another or at least equality within several occurring groups of double arm locking levers is desired. Different level heights of the release levels associated with the individual double-arm locking levers of the locking lever-controlling, level-varied side surface area can then be compensated for by different control pin lengths. A solution that is particularly advantageous from the point of view of production simplification and production costs is achieved if the locking lever-controlling, level-varied side surface areas of the key only have release levels have two different level heights and that accordingly only two control pin types of different lengths are provided.

In order to ensure that the additional locking pins and possibly the control pins cannot fall too far or completely into the key channel and thus lose the guidance in the holes receiving them, it is recommended that the additional locking pins and accordingly the additional locking pin holes and / or the control pins and accordingly the Control pin bores have a diameter gradation, each with a smaller-diameter bore section near the key channel and a larger-diameter bore section away from the key channel.

The lock cylinders according to the invention can in principle be designed with a wide variety of key profiles. However, it is advisable to design the keys as flat keys, which means that the level-varied side surface areas are level-varied by drilling or milling of correspondingly raised side surface areas. The flat keys are particularly desirable for the user who carries the key in a garment pocket, possibly on a keychain, together with several other keys and therefore wishes to have as few bulky keys as possible.

With regard to the greatest possible variation of the locking behavior of locking cylinders of the same basic design, the flat keys can be designed as flat keys with a cross-sectional profile, which find corresponding complementary counter profiles of the key channels.

In order to make the locking cylinder as efficient as possible, it is recommended that the slots are milled with a circular milling cutter with a circularly curved slot base. In any case, this embodiment is readily possible if the control connection of the double arm locking lever with the key side surfaces is established via control pins.

With regard to a simplified production of the locking projection recesses and the additional locking pin recesses, it is further proposed that the locking projection recesses and the additional locking pin recesses are formed in a sleeve which is inserted into a housing bore of the locking cylinder.

It is advisable to press the sleeve into the housing bore so that the recesses cannot be rotated.

For simple manufacture, it is particularly favorable if the locking projection recesses and / or the additional locking pin recesses completely penetrate the sleeve in the radial direction.

In order to protect the sleeve against external access and to maintain an unchanged appearance of conventional locking cylinders, it is proposed that the sleeve be covered at its front end by an end plate of the locking cylinder core.

A flat key that fully utilizes the possibilities of the locking cylinder according to the invention is characterized in that it has, at different distances from the key back on at least one side surface, a level-varied, locking lever-controlling side surface area and a level-varied, additional locking pin-controlling side surface area. An associated flat key blank is characterized by that he has a sufficiently raised profile area for the formation of the locking lever-controlling, level-varied side surface area and for the formation of the additional locking pin-controlling, level-varied side surface area at different distances from the key spine. In the raised profile areas, only holes or millings need to be made to vary the level. These holes and millings can be made in the factory of the manufacturer and also at the authorized locksmith with the usual work processes and machines, without opening the door to the unauthorized key imitation.

The locking cylinders according to the invention are suitable for both individual locking and locking systems.

In the case of a locking cylinder for individual locking, it is provided that the locking cylinder in question is different from other locking cylinders of the same basic type by differently fitting the slots with double arm locking levers and additional locking pins and / or by different shapes of the double arm locking levers and possibly different lengths of the control pins and / or by different lengths of the Additional locking pins and / or differentiated by different pin tumblers with correspondingly different key chest design and / or by different profile design of the key channel and accordingly the key. It can easily be seen that the basic structure of the locking cylinder according to the invention opens up a much higher possible variation than previous locking cylinders, whereby the optional use of double-arm locking levers and locking pins allows this variation possibility to be increased without one has to resort to an overly fine gradation of the key profiles and / or an overly fine gradation of additional platelets in the pin tumblers.

When building a locking system with a plurality of locking cylinders of the type according to the invention, i.e. a locking system in which each individual locking cylinder is assigned an individual key and a plurality of locking cylinders is assigned a higher-level key, which may have different values, the individual locking cylinders can be arranged within the plurality by different plate arrangements Distinguish the pin tumblers and / or by different profiling of the keys and thus the key channels and / or by different additional locking pin arrangements. It is conceivable to increase the locking variation in such a locking system by different positions of the double arm locking levers in such a way that the individual locking cylinders of the plurality differ from one another by differently occupying the slots with double arm locking levers. You can even use different level releasable locking levers if the locking projections of the locking levers are simultaneously disengaged from the respective locking projection recess in an angular range of finite angular value; the locking lever-controlling side surface areas of the individual keys are then carried out with release levels with at least two different level heights, namely a higher level height and a lower level height, and a superordinate key is carried out with release levels of medium level height. In this case, superordinate keys of different values (master key - general master key) can be provided in any way, which then go in the direction have increasing importance to an ever increasing extent control stations of medium level.

The basic idea of a locking system based on the double-arm locking lever principle, in which the double-arm locking levers release the locking cylinder core for rotation in a larger swivel range, so that higher-level keys are also possible, cannot be inferred from French publication 2 280 772 (utility model 74 27 050) and is intended to be independent be protected from the combination of the double arm locking lever principle with the additional locking pin principle.

Accordingly, the invention further relates to the use of locking cylinders to form a locking system, each locking cylinder comprising a locking cylinder housing, in particular a locking cylinder housing with a HAHN profile, a locking cylinder core rotatably mounted in a cylinder core bore of the locking cylinder with a key channel for receiving an adapted individual key and tumblers which level-varied side surface areas of the key are controlled and cooperate with recesses in the inner circumferential surface of the housing bore, the lock cylinder core being provided in the lock cylinders on at least one, preferably on both sides of the key channel with slots spaced in the axial direction and essentially perpendicular to the cylinder core axis, and at least part of these slots receives double-arm locking levers which can be pivoted about a locking lever pivot axis parallel to the cylinder core axis are on each arm have a locking projection for engaging in a locking projection recess on the inner circumferential surface of the housing bore, on one arm in control connection with a locking lever-controlling, level-varied side surface area of the key, are spring-loaded in the sense of maintaining this control connection and by the adapted individual key with two locking projections can be lifted out of both locking projection recesses. It is provided according to the invention that the locking lever-controlling, level-varied side surface areas of the adapted individual key have release levels with at least two different level heights, namely a higher level height and a lower level height, the locking levers have a swivel angle range of finite angle value within which they disengage with both locking projections There are locking projection recesses, and a superordinate key is provided, which has release levels with a medium level.

A preferred form of a locking system with a group of locking cylinders is constructed in such a way that at least some of the locking cylinders within the group differ from one another by different positions of double arm locking levers that can be released at the same level, that the individual keys each have release levels of the same level where the corresponding locking cylinder is located there are lock levers that can be released at the same level and that a higher-level key has release levels of the same level for all lock levers of several or all lock cylinders of the group that can be released at the same level. In this embodiment, locking levers can be used, which are only in a single pivoting position with both locking projections out of engagement with the locking projection recesses, which is of considerable importance with regard to the security value of the locking cylinder.

Double arm locking levers that can be released at the same level in particular come into question in terms of shape and size are the same and, if necessary, interact with control pins of the same length.

It should also be mentioned that in each case the locking projection recess and the locking pin recess in the peripheral surface of the cylinder core bore can also be easily produced as coherent grooves.

It should also be mentioned that for the lock cylinder construction according to the invention, as already for the construction according to DE-PS 20 03 059, there is the possibility of laying the additional locking pin-controlling side surface areas of the key in such a way that the key strength does not replace the lowest-lying control points with a continuous groove allowed by either breaking the key in two or weakening it excessively.

• a) der Schließzylinderkern mindestens auf einer, vorzugsweise auf beiden Seiten des Schlüsselkanals mit in Achsrichtung beabstandeten im wesentlichen senkrecht zur Zylinderkernachse gelegenen Schlitzen versehen ist;
• b) diese Schlitze zur Aufnahme von Doppelarmsperrhebeln ausgebildet sind, welche um eine zur Zylinderkernachse parallele Sperrhebelschwenkachse schwenkbar gelagert sind, an beiden Armen je einen Sperrvorsprung zum Eingriff in je eine Sperrvorsprungausnehmung an der Innenumfangsfläche der Zylinderkernbohrung aufweisen, an einem Arm in Steuerverbindung mit einem sperrhebelsteuernden, niveauvariierten Seitenflächenbereich des profilierten Flachschlüssels stehen, federbelastet im Sinne der Aufrechterhaltung dieser Steuerverbindung sind und durch den angepaßten Flachschlüssel mit beiden Sperrvorsprüngen aus beiden Sperrvorsprungausnehmungen aushebbar sind;
• c) die Zusatzsperrstiftbohrungen mit ihren Bohrungsachsen annähernd in jeweils einer Schlitzmittelebene liegen und die jeweiligen Schlitzseitenflächen zylindersegmentförmig anschneiden;
• d) und wenigstens ein Teil derjenigen Zusatzsperrstiftbohrungen, welche mit von Doppelarmsperrhebeln nicht besetzten Schlitzen zusammenfallen, mit federlosen Zusatzsperrstiften besetzt sind; und
• e) der profilierte Flachschlüssel in unterschiedlichen Abständen von dem Schlüsselrücken an mindestens einer Seitenfläche einen niveauvariierten, sperrhebelsteuernden Seitenflächenbereich und einen niveauvariierten, zusatzsperrstiftsteuernden Seitenflächenbereich aufweist entsprechend der Besetzung des Schließzylinders mit Doppelarmsperrhebeln und federlosen Zusatzsperrstiften.

The invention further relates to a method for producing a combination of a lock cylinder and a profiled flat key, the lock cylinder being a lock cylinder housing, in particular a lock cylinder housing with HAHN profile, a lock cylinder core rotatably mounted in a cylinder core bore of the lock cylinder housing and having a profiled key channel for receiving the profiled flat key, spring-loaded pin tumblers with spring-loaded housing pins accommodated in housing bores and associated core pins received in core bores, controlled by toothing of the key face and with additional tumblers located axially between successive pin tumblers, which by level-varied side surface areas of the profiled flat key are controlled and cooperate with recesses in the inner circumferential surface of the cylinder core bore, in such a way that the lock cylinder core is provided with additional locking pin holes for receiving spring-free additional locking pins which serve as additional tumblers and which, with their respective near-key end, are controlled by an additional locking block Side surface area of the profiled flat key are controlled, cooperate with their respective end remote from the key channel, each with a locking pin recess in the circumferential surface of the cylinder core bore, and with an adapted flat key can be disengaged from the respective additional locking pin recess by rotating the locking cylinder core, and further

• a) the lock cylinder core is provided on at least one, preferably on both sides of the key channel with slots spaced in the axial direction and substantially perpendicular to the cylinder core axis;
• b) these slots are designed to accommodate double-arm locking levers, which are pivotably mounted about a locking lever pivot axis parallel to the cylinder core axis, each have a locking projection on both arms for engaging in a locking projection recess on the inner circumferential surface of the cylinder core bore, on one arm in control connection with a locking lever-controlling one, level-varied side surface area of the profiled flat key are spring-loaded in the sense of maintaining this control connection and can be lifted out of both locking projection recesses by means of the adapted flat key with both locking projections;
• c) the additional locking pin bores with their bore axes lie approximately in a slot center plane and cut the respective slot side surfaces in the form of a cylindrical segment;
• d) and at least some of those additional locking pin bores which coincide with slots not occupied by double arm locking levers are occupied by springless additional locking pins; and
• e) the profiled flat key at different distances from the key back on at least one side surface has a level-varied, locking lever-controlling side surface area and a level-varied, additional locking pin-controlling side surface area, corresponding to the occupation of the locking cylinder with double-arm locking levers and springless additional locking pins.

Such a combination can be obtained in a simple manner in that the slots in the lock cylinder core, which cut the side walls of the slots in the manner of a cylinder segment and open into the key channel, and the control pin bores connecting the bottom of the slot with the key channel, are drilled or drilled in such a way that the openings of the Additional locking pin bores and the control pin bores each lie in axially parallel openings with different distances from the outer circumference of the lock cylinder core, that at least part of the slots are each occupied with a double arm locking lever and the associated control pin bores each with a control pin, that at least a part of the additional locking pin bores coinciding with unoccupied slots Additional locking pins are used to provide a key blank that is profile-matched to the key channel and that is spaced at intervals of one ndungsreihen corresponding one of the outer periphery of the lock cylinder core distances from the key spine each have a sufficiently raised profile area for the formation of the locking lever-controlling, level-varied side surface area and for the formation of the additional locking pin-controlling, level-varied side surface area, and that according to the occupation of the lock cylinder core with control pins and with additional locking pins in the individual profile areas, the level variation is attached by drilling or milling.

• Figur 1 eine Seitenansicht des Zylinderkerns bei einem erfindungsgemäßen Schließzylinder;
• Figur 1a einen Schnitt nach Linie Ia/Ia der Figur 1 durch einen erfindungsgemäßen Schließzylinder mit angepaßtem Schlüssel gemäß Figur 1e;
• Figur 1b einen Schnitt nach Linie Ib/Ib mit angepaßtem Schlüssel gemäß Figur 1e;
• Figur 1c einen Schnitt nach Linie Ia/Ia mit falschem Schlüssel gemäß Figur 1f;
• Figur 1d einen Schnitt nach Linie Ib/Ib mit falschem Schlüssel gemäß Figur 1f;
• Figur 2a eine weitere Ausführungsform in einem Schnitt entsprechend der Linie Ia/Ia mit angepaßtem Schlüssel gemäß Figur 2g;
• Figur 2b einen Schnitt entsprechend Linie Ib/Ib bei dem Schließzylinder gemäß Figur 2a mit angepaßtem Schlüssel gemäß Figur 2g;
• Figur 2c einen Schnitt gemäß Linie Ia/Ia bei einem Schließzylinder entsprechend Figuren 2a und 2b mit falschem Schlüssel entsprechend Figur 2h;
• Figur 2d einen Schnitt entsprechend Linie Ib/Ib bei einem Schließzylinder entsprechend Figuren 2a und 2b mit falschem Schlüssel entsprechend Figur 2h;
• Figur 2e einen Schnitt entsprechend Linie Ia/Ia bei einem Schließzylinder entsprechend Figures 1a und 1b mit einem übergeordneten Schlüssel gemäß Figur 2i;
• Figur 2f einen Schnitt nach Linie Ib/Ib bei einem Schließzylinder entsprechend Figuren 2a und 2b mit dem übergeordneten Schlüssel gemäß Fig. 2i.
• Figur 3a und 3 b schematische Darstellungen zweier eine Schließanlage bildender Schließzylinder;
• Figur 3c einen übergeordneten Schlüssel zu den Schließzylindern nach den Figuren 3a und 3b;
• Figur 4a einen Querschnitt durch den Schließzylinder gemöß Figur 3a in der Position G;
• Figur 4b einen Schnitt durch den Schließzylinder gemäß Figur 3b in der Position H;
• Figur 5a eine Seitenansicht zu dem Flachschlüssel gemäß Figur 3a;
• Figur 5b eine Seitenansicht des Flachschlüssels gemäß figur 3b;
• Figur 5c eine Seitenansicht des Flachschlüssels gemäß Figur 3c;
• Figur 6 eine Abwandlung zu der Ausführungsform nach den Figuren 1 und 1a;
• Figur 7 eine Ansicht der Ausführungsform nach Figur 6, teilweise geschnitten.

The accompanying figures explain the invention using exemplary embodiments. They represent:

• Figure 1 is a side view of the cylinder core in a lock cylinder according to the invention;
• Figure 1a shows a section along line Ia / Ia of Figure 1 by a lock cylinder according to the invention with an adapted key according to Figure 1e;
• 1b shows a section along line Ib / Ib with an adapted key according to FIG. 1e;
• 1c shows a section along line Ia / Ia with the wrong key according to FIG. 1f;
• Figure 1d shows a section along line Ib / Ib with the wrong key according to Figure 1f;
• 2a shows a further embodiment in a section along the line Ia / Ia with an adapted key according to Figure 2g;
• 2b shows a section along line Ib / Ib in the locking cylinder according to FIG. 2a with an adapted key according to FIG. 2g;
• Figure 2c shows a section along line Ia / Ia in a lock cylinder according to Figures 2a and 2b with the wrong key according to Figure 2h;
• Figure 2d shows a section along line Ib / Ib in a lock cylinder corresponding to Figures 2a and 2b with the wrong key according to Figure 2h;
• 2e shows a section along line Ia / Ia in a locking cylinder according to FIGS. 1a and 1b with a superordinate key according to FIG. 2i;
• Figure 2f shows a section along line Ib / Ib in a lock cylinder corresponding to Figures 2a and 2b with the parent key according to Fig. 2i.
• 3a and 3b are schematic representations of two locking cylinders forming a locking system;
• 3c shows a superordinate key to the locking cylinders according to FIGS. 3a and 3b;
• Figure 4a shows a cross section through the lock cylinder 3a in position G;
• 4b shows a section through the locking cylinder according to FIG. 3b in position H;
• 5a shows a side view of the flat key according to FIG. 3a;
• FIG. 5b shows a side view of the flat key according to FIG. 3b;
• FIG. 5c shows a side view of the flat key according to FIG. 3c;
• Figure 6 shows a modification to the embodiment of Figures 1 and 1a;
• Figure 7 is a view of the embodiment of Figure 6, partially in section.

In Figures 1, 1a and 1b, the housing of a lock cylinder is designated 10 and executed with HAHN profile. The lock cylinder housing 10 has a cylinder core bore 12 which receives a lock cylinder core 14. The inner circumferential surface of the cylinder core bore is designated 12a. The lock cylinder core 14 has a key channel 16 in which an adapted flat key 17 is received. The lock cylinder housing 10 has housing bores 18 which receive housing pins 19. In the lock cylinder core 14, core bores 20 are provided, which are intended for receiving core pins 21. The key 17 has a serrated key face 22, which is intended to separate the separating surfaces between the housing pins 19 and the core pins 21 in the inner peripheral surface 12a of the cylinder core bore 12 to be classified so that the lock cylinder core 14 can be rotated. In this case, plates 23 can be arranged between the housing pins 19 and the core pins 21 in order to enable the cylinder core 14 to rotate with different jagged levels of the key face 22, in particular in locking systems.

The cylinder core 14 is designed with axially normal slots 24 on both sides of the key channel 16. The slots 24 are milled with a side milling cutter and have a slot base 24a.

The slots 24 are penetrated by parallel to the cylinder core axis bearing pins 25, which are received in corresponding holes in the cylinder core. Double arm locking levers 26 are mounted on the bearing pins 25. The double arm locking levers 26 each have two locking projections 26a and 26b, which are attached to arms 27a and 27b, respectively. The locking projections 26a and 26b are dimensioned such that they both lie flush with the inner circumferential surface 12a in a single angular position shown in FIGS. 1a and 1b and thus release the lock cylinder core for rotation. A control pin 28 bears against the arm 27a and is displaceably mounted in a control pin bore 29 of the lock cylinder core 14. This control pin 28 engages with its inner end in a key hole 30 of the adapted flat key 17. The depth of the bore 30 of the flat key 17 is dimensioned taking into account the length of the control pin 28 and the shape of the locking lever 26 so that the two locking projections 26a and 26b lie flush with the inner peripheral surface 12a of the cylinder core bore 12 and the cylinder core 14 can be rotated.

A plurality of slots 24 are provided on each side of the key channel 16, specifically in the middle between two pin tumblers 19, 21 which follow one another in the axial direction.

The slots 24 are widened by stepped additional locking pin bores 31, which each consist of a larger bore section 31a and a smaller bore section 31b. In the additional locking pin bores 31 additional locking pins 32 are accommodated, which each consist of a larger-diameter locking pin section 32a and a smaller-diameter locking pin section 32b. The additional locking pin bores 31 penetrate the respective slot base 24a. The additional locking pins 32 abut the flat key 17 with rounded inner ends and are formed with outer rounded ends for engagement in locking pin recesses 33 on the inner circumferential surface 12 a of the cylinder core bore 12. On the side surfaces of the flat key 17, for example, level-varied additional locking pin-controlling side surface areas 34 are arranged at the level of the additional locking pins 32, which cooperate with the additional locking pins 32. The level-varied, additional locking pin-controlling side surface areas 34 of the key 17 have control points drilled and not drilled as release levels. The lengths of all additional locking pins can be the same if the holes in the key are of the same depth and the additional locking pin increases 33 are of the same depth.

In Figure 1a, the additional locking pin 32 engages in the additional locking pin recess 33. It is not shown that the associated level-varied side surface area 34 of the key 17 has a bore for the engagement of the inner end of the additional locking pin 32 as a release level, which is just sufficient to completely remove the radially outer end of the additional locking pin recess 33 from the additional locking pin recess 33 when the additional locking pin 32 is moved inward. When the locking cylinder core 14 is rotated by the flat key 17, the additional locking pin 32 is pushed inward by cam-like interaction of its outer end with the additional locking pin recess 33 into the hole in the flat key 17. The key back is labeled 50.

All slots 24 can either be occupied with an additional locking pin 32 or with a locking lever 26. Individual slots can also be empty. The occupation with additional locking pins 32 and locking levers 26 differs from locking cylinder to locking cylinder.

The locking lever 26 is loaded by a helical compression spring 35 in the counterclockwise direction, in such a way that, with a suitable flat key 17, the locking projections 26a and 26b lie flush with the inner circumferential surface 12a of the cylinder core bore 12. In the basic position of the locking cylinder core 14 shown in FIG. 1a, the locking projections 26a and 26b are opposite locking projection recesses 36a and 36b in the inner peripheral surface 12a of the cylinder core bore 12.

The helical compression spring 35 is received in a bore 37, the diameter of which is larger than the width of the slot 24, so that the lateral boundary surfaces of the slot 24 are cut.

The level-varied side surface areas of the key, which are intended to interact with the control pins 28, are designated by 38. The bores 30 are received in these side surface areas.

1e shows a section through the adapted flat key 17 at the level of the level-varied side surface areas 38 with the bore 30.

A further locking lever 26 of the same shape is shown in FIG. 1b. This locking lever 26 is located at a point at which the level-varied, locking lever-controlling side surface area 38 has no drilling. Accordingly, a shorter control pin 28ʹ is inserted at this point, so that the locking lever 26 with its locking projections 26a and 26b is again flush with the inner peripheral surface 12a.

Only when the correct flat key 17 is inserted, are both locking levers 26 with their locking projections 26a and 26b out of engagement with the locking projection recesses 36a and 36b. The locking projection recesses 36a, 36b are machined as longitudinal grooves in the inner peripheral surface 12a.

If a wrong key 17ʹ according to FIG. 1f is inserted, the positions according to FIGS. 1c and 1d occur for the two locking levers 26, so that according to FIG. 1c the locking projection 26a engages in the locking projection recess 36a and according to FIG. 1d the locking projection 26b Locking projection recess 36b engages. Then the lock cylinder core 14 is locked against rotation.

In the example, only two control pins 28, 28ʹ are provided. If several slots 24 are occupied with locking levers 26 and the bores 30 are all of the same depth or the other control points of the level-varied side area 38 are not drilled, then only two different control pin lengths are required.

The additional locking pins 32 have a locking effect if a wrong key 17 'has no drilling or a shallow drilling at the location of the respective additional locking pins.

A modified embodiment is shown in FIGS. 2a and 2b. It can be seen that the locking levers 126 are measured in such a way that their locking projections 126a and 126b do not engage in the locking projection recesses 136a and 136b in a limited pivoting range. Figures 2a and 2b show the lock cylinder with the correct key according to Figure 2g. It is assumed that the same slots 124 as in Figures 1a and 1b are again occupied with locking levers 126 and that long and short control pins 128 and 128ʹ are assigned to these locking levers again. In Figures 2a and 2b, the locking projections 126a and 126b are approximately the same distance from the inner peripheral surface 112a.

2c and 2d show the angular positions of the locking lever 126 when a wrong key 117 Schlüssel according to FIG. 2h is inserted. The lock cylinder core 114 cannot then be rotated.

FIGS. 2e and 2f show the locking cylinder according to FIGS. 2a and 2b when a superordinate key 117ʺ according to FIG. 2i is inserted. The key 117ʺ has medium-shallow holes 130ʺ in all control positions of the level-varied, locking lever-controlling side surface areas 138, so that all of the existing locking levers 126 are in positions in which the cylinder core 114 can be rotated. It can be seen in Figure 2e that the upper locking projection 126a is just flush with the inner peripheral surface 112a, while the lower locking projection 126b is at its maximum distance from the inner peripheral surface 112a. Conversely in Figure 2f the locking projection 126a maximum distance from the inner peripheral surface 112a, while the locking projection 126b is flush with the inner peripheral surface 112a.

The key according to FIG. 2i is a superordinate master key and allows all locking levers 126 to be brought into release positions. This master key has in the locking lever-controlling, level-varied side surface areas 138 consistently deep holes 130ʺ, and just so deep that all locking levers 126 with both locking projections 126a, 126b have emerged from the locking projection recesses 136a, 136b. The embodiment according to FIGS. 2a and 2f is intended in particular for locking systems. In locking systems, the locking cylinder within the locking system can u. a. differentiate by differently occupying the slots 124 with locking levers 126 and / or additional locking pins 132. A distinction is also possible by varying the profile of the flat key 117. Furthermore, a distinction can be made by different platelets according to FIG. 1a, position 23, as is customary.

Of course, in the slots in which locking levers are present, no additional locking pins can be present in the selected embodiment according to the figures. However, it is also conceivable to arrange the additional locking pins outside the pivoting range of the locking levers, so that an additional locking pin can also be present in each slot in addition to a locking lever.

In the key representations according to FIGS. 1e, 1f and 2g to 2i, the control points or release levels 51 which have not been drilled open are each indicated by a reinforced line. These control points differ, however not from the other profile history.

A preferred embodiment of a locking system is shown in a schematic illustration in FIGS. 3a and 3b using an exemplary embodiment. Analog parts are provided with the same reference numerals as in Figure 1a, each increased by the number 200. The indices G and H mean the assignment to the positions G and H, while the indices I and II the assignment to two different locking cylinders I and II which, in the example, means only a locking system consisting of two locking cylinders.

According to FIGS. 3a and 4a, a locking cylinder has a single locking lever 226 GI in position G. The other locking cylinder according to FIG. 3b has a single locking lever 226HII according to FIGS. 3b and 4b. The locking levers 226GI and 226HII are of the same dimensions and rest on control pins 228 GI and 228 HII of the same length on the respective flat key 217I and 217II, namely the former at the release level 230GI and the second at the release level 230HII. It can be seen that the locking projections 226aGI and 226aHII are flush with the inner peripheral surfaces 212aI and 212aII, respectively. The correct key is therefore present in both locking cylinders, so that the respective cylinder core can be rotated.

It can easily be seen that the key 217II does not fit the locking cylinder according to FIG. 3a and that conversely the key 217I does not fit the locking cylinder according to FIG. 3b. In contrast, one can see in FIG. 3c a superordinate key 217I + II with two release levels, namely 230GI + II and 230HI + II. The key 217I + II according to FIG. 3c is therefore a superordinate key which is used both for the lock cylinder according to Figure 3a and for the lock cylinder according to Figure 3b fits.

In Figure 3a it is indicated that an additional locking pin 232HI can be arranged in position H and in Figure 3b it is indicated that in position G an additional 232GII can be arranged. FIGS. 5a and 5b show the side views of the keys belonging to FIGS. 3a and 3b. The key according to FIG. 5a shows a locking lever release level 230GI in the level-varied, locking lever-controlling side surface area 238 and an additional locking lever release level 250HI in the additional-pin-controlling, level-varying side surface area 234. Accordingly, the flat key according to FIG Release level 250GII in the additional locking pin-controlling, level-varied side surface area 234. Accordingly, the higher-level key according to FIG 234.

It can further be seen from FIGS. 5a to 5c that the keys 217I, 217II and 217I + II are provided with profiles 251. These profiles can, but do not have to be identical for all three keys.

It is of course now possible to arrange the locking lever in other positions A to H. Of course, A to H locking levers can be used in each individual locking cylinder of the locking system be provided and accordingly release levels on the associated keys in the respective positions. Where there are no locking levers, additional locking pins can be attached.

As can be seen from FIGS. 4a and 4b, the locking levers 226GI and 226HII are identical in shape and dimensions to one another, in such a way that they are in a single angular position out of engagement with both associated locking projection recesses 236aGI, 236bGI and 236aHII and 236bHII. In this embodiment, it is necessary that the release levels 230GI and 230HII and all other release lever-releasing levels have the same level height so that a higher-level key 217I + II is possible. This means that the control pins 228GI and 228HII are also of the same length in the entire locking system.

It is indeed possible to provide locking levers which can be released in different ways in the individual locking cylinders, for example in the same positions in each case. It is important, however, that the same release levels 230GI and 230HII etc. are used in those positions whose locking levers are used to differentiate the locking cylinders within the locking system, so that a higher-level key is possible.

It can easily be seen that a considerable number of possible variations is created by position variation of the locking lever and the additional locking pins in positions A to H. The additional locking pins 232HI (FIG. 3a), 232GII (FIG. 3b), 232CI (FIG. 4a) and 232DII (FIG. 4b) are also designed to be of the same level, so that a superordinate key is also possible.

It should also be noted at this point that the slots required for receiving the locking levers and the additional locking pin bores required for receiving the additional locking pins may also be present in those places where there may be no locking levers and no additional locking pins. This means that the cylinder cores can be made the same for all locking cylinders and that individual locking cylinders differ from one another only by differently filling the slots with locking levers and by differently filling the additional locking pin bores with additional locking pins. This is important for the factory production without the accessibility of the locking cylinders for unauthorized persons being made easier.

In the example, the release levels 230GI, 230HII, 250HI, 250GII etc. are each formed by bores, the depth of the bores 230 GI and 230HII being the same and the depth of the bores 250HI and 250GII being the same. Of course, it is also possible to obtain the release levels by milling in corresponding ribs.

If the locking cylinder variation is not sufficient due to the locking lever and the additional locking pins, for example in the case of very large locking systems, it is of course also possible to use other distinguishing features to differentiate the locking cylinder within a locking system. For example, the profiles 251 of the keys according to FIGS. 5a and 5b can be made different, in which case a higher-level key profile must then be used for the higher-level key according to FIG. 5c, both in the key channel of the locking cylinder according to FIG. 4a and fits into the key channel of the locking cylinder according to Figure 4b. Furthermore, it is possible to differentiate the locking cylinders of a locking system by different plate heights and number of plates at points 223I (FIG. 4a) or 223II in the locking cylinder according to FIG. 4b. In this case, a superordinate key must be designed in its serration in the chest in such a way that it brings the tumbler pin pairs into a release position in the case of several or all locking cylinders of the locking system.

In principle, it is also possible to use only the key profiles 251 and / or the plates 223I or 223II within the locking system to distinguish the locking cylinders from one another and to use the locking levers and the additional locking pins to differentiate between locking systems. In the latter case, there is of course no longer a requirement that all locking levers can be released at the same level.

FIG. 6 shows an embodiment in which the locking projection recesses 336a and 336b and the additional locking pin recesses 333 are formed in a sleeve 353. This sleeve 353 can be made of stainless steel and inserted, in particular pressed, into a cylinder core bore 312. In this way, the production of the locking projection recesses 336a and 336b is made considerably easier. It is also advantageous that the sleeve 353 can be made of stainless steel, because it significantly reduces the risk of wear of the locking cylinder compared to a locking cylinder in which the locking projection recesses and the additional locking pin recesses are formed directly in the regularly softer material of the locking cylinder housing are. It should be noted at this point that the lock cylinder housing is preferably made from a non-ferrous metal, in particular brass, for manufacturing reasons, which is much more sensitive to wear than stainless steel. The locking projection recesses and the additional locking pin recesses can be formed continuously in the sleeve 353, whereby the production is further simplified.

In contrast to the other cross-sectional figures, FIG. 6 also shows that the locking projection recesses 336a and 336b are rounded at their edges 354a, 354b, 354c and 354d. This is essential if the additional locking pins 332 lie in the same plane as the locking levers 326, so that when the locking cylinder core is turned by means of the inserted key, the additional locking pins 332 can slide over the edges 354a to 354d without the risk of getting caught.

FIG. 7 shows that the sleeve 353 is covered by the end plate 355 of the lock cylinder core 314, so that the sleeve 353 is inaccessible and the appearance of the lock cylinder from the end does not differ from conventional lock cylinders.

For the term HAHN profile, reference is made to FIG. 6. The HAHN profile of the locking cylinder 310 shown in FIG. 6 is referred to in German as "HAHN profile".

It has already been mentioned above that the slots and the additional locking pin bores in the locking cylinder core can be present in all positions, even where there are no locking levers and no additional locking pins are installed on the respective locking cylinder. This also applies to the locking projection recesses and the additional locking pin recesses.

6 shows the following:
The control pin 328 consists of an outer portion 328a of larger diameter and an inner portion 328b of smaller diameter. Accordingly, the control pin bore 329 is composed of an outer portion 329a of larger diameter and an inner portion 329b of smaller diameter. This also ensures that the control pin 328 cannot fall into the closing channel 322.

With regard to the sleeve 353, it can be seen from FIG. 6 that it has a slot 357. The boundary edges of this slot rest on contact surfaces 356 of the lock cylinder housing 310, so that the sleeve 353 is non-rotatably fixed in the lock cylinder housing.

Claims (26)

1. Lock cylinder, comprising a lock-cylinder housing (10), especially a lock-cylinder housing with a HAHN profile, a lock-cylinder core (14) mounted rotatably in a cylinder-core bore (12) of the lock-cylinder housing (10) and having a key channel (16) for receiving a suitable key (17), spring-loaded pin tumblers (19, 21) with spring-loaded housing pins (19) received in housing bores (18), and associated core pins (21) received in core bores (20) and controlled by a toothing of the key bit (22), and additional tumblers (26, 32) which are located axially between successive pin tumblers (19, 21) and which are controlled by side-face regions (38, 34) of varied level of the key (17) and interact with recesses (36a, 36b, 33) in the inner circumferential face (12a) of the cylinder core bore (12), specifically in that the lock-cylinder core (14) is equipped with supplementary blocking-pins bores (31) for receiving springless supplementary blocking pins (32) which serve as additional tumblers and which at their respective end near the key are controlled by a side-face region (34), controlling the supplementary blocking pins and of varied level, of the key (17), at their respective end remote from the key channel interact in a cam-like manner with a respective blocking-pin recess (33) in the circumferential face (12a) of the cylinder-core bore (12) and, with a suitable key (17), can be disengaged from the respective supplementary blocking-pin recess (33) as a result of the rotation of the lock-cylinder core (14), characterised in that

   a) the lock-cylinder core (14) is equipped, at least on one and preferably on both sides of the key channel (16), with axially spaced slots (24) arranged essentially perpendicularly to the cylinder-core axis;

   b) these slots (24) are designed for receiving double-armed blocking levers (26) which are mounted pivotably about a blocking-lever pivot axis (25) parallel to the cylinder-core axis, on both arms (27a, 27b) each have a blocking projection (26a, 26b) for engagement into a respective blocking-projection recess (36a, 36b) on the inner circumferential face (12a) of the cylinder-core bore (12), on one arm (27a) are connected for control purposes to a side-face region (38), controlling the blocking levers and of varied level, of the key (17), are spring-loaded for the effect of maintaining this control connection and can be lifted with the two blocking projections (26a, 26b) out of the two blocking-projection recesses (36a, 36b) by the suitable key (17);

   c) the supplementary blocking-pin bores (31) lie with their bore axes approximately in the respective slot mid-plane and intersect the respective slot side faces in the manner of a cylinder segment;

   d) those supplementary blocking-pin bores (31) coinciding with slots (24) not occupied by double-armed blocking levers (26) can be occupied by springless supplementary blocking pins (32).
2. Lock cylinder according to Claim 1, characterised in that the two blocking-lever projections (26a, 26b) are each simultaneously out of engagement with the respective blocking-projection recess (36a, 36b) in only a single pivot-angle position of the double-armed blocking lever (26), that is to say both are simultaneously approximately flush with the inner circumferential face (12a) of the cylinder-core bore (12).
3. Lock cylinder according to Claim 1 or 2, characterised in that the control connection between a double-armed blocking lever (26) and the side-face regions (38) controlling the blocking levers and of varied level is made by means of a control pin (28) which is received by a control-pin bore (29) connecting the respective slot bottom (24a) to the key channel (16).
4. Lock cylinder according to Claim 3, characterised in that the control-pin bore (29) is larger in diameter than the slot width and intersects the two slot side faces in the manner of a cylinder segment.
5. Lock cylinder according to one of Claims 1 to 4, characterised in that one double-armed blocking lever (26) is loaded by a helical compression spring (35) which is received by a spring bore (37) intersecting the slot side faces of the respective slot (24) and/or the slot bottom (24a).
6. Lock cylinder according to one of Claims 1 to 5, characterised in that the side-face regions (38), controlling the blocking levers and of varied level, of the key (17) and the side-face regions (34), of varied level and controlling the supplementary blocking pins, of the key (17) are located at different distances from the key spine.
7. Lock cylinder according to Claim 6, characterised in that the side-face regions (38), controlling the blocking levers and of varied level, of the key (17) are located nearer the key spine (50) than the side-face regions (34), controlling the supplementary blocking pins and of varied level, of the key (17).
8. Lock cylinder according to one of Claims 1 to 7, characterised in that a bearing pin (25), common to a plurality of double-armed blocking levers (26), passes respectively through a plurality of, preferably all the slots (24) on at least one side of the key channel (16).
9. Lock cylinder according to one of Claims 3 to 7, characterised in that all the double-armed blocking levers (26) are of mutually identical design.
10. Lock cylinder according to Claim 9, characterised in that different level heights of the release level (30, 51), belonging to the individual double-armed blocking levers (36), of the side-face region (38) controlling the blocking levers and of varied level are compensated by different control-pin lengths (28, 28').
11. Lock cylinder according to Claim 10, characterised in that the side-face regions (38), controlling the blocking levers and of varied level, of the key (17) have release levels (30, 51) with only two different level heights, and in that only two control-pin types (28, 28') of different length are therefore provided.
12. Lock cylinder according to one of Claims 1 to 11, characterised in that the supplementary blocking pins (32) and correspondingly the supplementary blocking-pin bores (31) and/or the control pins (28, 28') and correspondingly the control-pin bores (29) have a diametral gradation respectively with a bore portion (31b) of smaller diameter and located near the key channel and with a bore portion (31a) of larger diameter and located further from the key channel.
13. Lock cylinder according to one of Claims 1 to 12, characterised in that the key (17) is a flat key.
14. Lock cylinder according to Claim 13, characterised in that the flat key (17) is a profiled flat key.
15. Lock cylinder according to one of Claims 1 to 14, characterised in that the slots (24) are milled with a circularly curved slot bottom (24a) by means of a disk milling cutter.
16. Lock cylinder according to one of Claims 1 to 15, characterised in that the blocking-projection recesses (336a, 336b) and the supplementary blocking-pin recesses (333) are formed in a sleeve (353) which is inserted, especially pressed, into a housing bore (312) of the lock cylinder (310).
17. Lock cylinder according to Claim 16, characterised in that the sleeve (353) is slotted and is fixed non-rotatably by means of the slot edges to stop faces (356) of the lock-cylinder housing (310), the stop faces (356) preferably being arranged symmetrically in relation to the longitudinal mid-plane of the lock-cylinder housing (310).
18. Lock cylinder according to one of Claims 16 and 17, characterised in that the blocking-projection recesses (336a, 336b) and/or the supplementary blocking-pin recesses (333) pass completely through the sleeve (353) in the radial direction.
19. Lock cylinder according to one of Claims 16 to 18, characterised in that the sleeve (353) is covered on its end face with a closing plate (355) of the lock-cylinder core (314).
20. Lock cylinder, especially for individual locking, according to one of Claims 1 to 19, characterised in that it differs from other lock cylinders of the same basic design in a different occupation of the slots (24) by double-armed blocking levers (26) and supplementary blocking pins (32) and/or in different forms of the double-armed blocking levers (26) and, if appropriate, different lengths of the control pins (28) and/or in different lengths of the supplementary blocking pins (32) and/or in different pin tumblers (29, 21) with a correspondingly different key-bit design (22) and/or in a different profiling of the key channel (16) and correspondingly of the key (17).
21. Lock installation with a plurality of lock cylinders according to one of Claims 1 to 19, each individual lock cylinder being assigned an individual key (117) and a plurality of lock cylinders being assigned a master key (117''), characterised in that individual lock cylinders of the plurality differ from one another in a different plate arrangement (23) in the pin tumblers (19, 21) and/or in a different key profiling and/or in different arrangements of supplementary blocking pins.
22. Lock installation according to Claim 23, characterised in that individual lock cylinders of the plurality differ from one another in a different occupation of the slots (124) by double-armed blocking levers (126), the blocking projections (126a, 126b) of the blocking levers (126) being simultaneously out of engagement with the respective blocking-projection recesses (136a, 136b) in an angular sector of finite angular value, the side-face regions (138), controlling the blocking levers, of the individual keys (117) having release levels (130, 151) with at least two different level heights, namely a higher level height and a lower level height, and a master key (117'') possessing control points (130') with a medium level height.
23. Use of lock cylinders for forming a lock installation, each lock cylinder comprising a lock-cylinder housing (110), especially a lock-cylinder housing with a HAHN profile, a lock-cylinder core (114) mounted rotatably in a cylinder-core bore (112a) of the lock cylinder (110) and having a key channel (116) for receiving a suitable individual key (117), and tumblers (126) which are controlled by side-face regions (138) of varied level of the key (117) and which interact with recesses (136a, 136b) on the inner circumferential face (112a) of the housing bore (112), in the lock cylinders the lock-cylinder core (114) being equipped on at least one, preferably on both sides of the key channel (116) with axially spaced slots (124) arranged essentially perpendicularly to the cylinder-core axis, and at least some of these slots (124) receiving double-armed blocking levers (126) which are mounted pivotably about a blocking-lever pivot axis (125) parallel to the cylinder-core axis, on both arms each have a blocking projection (126a, 126b) for engagement into a respective blocking-projection recess (136a, 136b) on the inner circumferential face (112a) of the housing bore (112), on one arm are connected for control purposes to a side-face region (138), controlling the blocking levers and of varied level, of the key (117), are spring-loaded for the effect of maintaining this control connection and can be lifted with the two blocking projections (126a, 126b) out of the two blocking-projection recesses (136a, 136b) by the suitable individual key (117), characterised in that the side-face regions (138), controlling the blocking levers and of varied level, of the suitable individual keys (117) have release levels (130, 151) with at least two different level heights, namely a higher level height (151) and a lower level height (130), the blocking levers (126) have a pivoting-angle sector of a finite angular value, within which they are out of engagement with the blocking-projection recesses (136a, 136b) with the two blocking projections (126a, 126b), and there is a master key (117'') which has release levels (130'') with a medium level height.
24. Lock installation with a group of lock cylinders according to one of Claims 2 to 8 and 12 to 19, characterised in that at least some of the lock cylinders within the group differ from one another in different positions (A to H) of double-armed blocking levers (226GI, 226HII) of the same release level, in that the individual keys (217I, 217II) possess their respective release levels (230GI, 230HII) of the same level height, where blocking levers (226GI, 226HII) of the same release level are located in the corresponding lock cylinder and in that a master key (217I+II) has release levels (230GI+II, 230HI+II) of the same level height for all the blocking levers (226G1, 226HII) of the same release level of a plurality of or all the lock cylinders of the group.
25. Lock installation according to Claim 26, characterised in that the blocking levers (226GI, 226HII) serving for differention of the lock cylinders within the group are of identical form and size and, if appropriate, interact with control pins (228GI, 228II) of the same size.
26. Process for producing a combination of a lock cylinder and of a profiled flat key, the lock cylinder having a lock-cylinder housing (10), especially a lock-cylinder housing with a HAHN profile, a lock-cylinder core (14) mounted rotatably in a cylinder-core bore (12) of the lock-cylinder housing (10) and having a profiled key channel (16) for receiving the profiled flat key (17), spring-loaded pin tumblers (19, 21) with spring-loaded housing pins (19) received in housing bores (18), and associated core pins (21) received in core bores (20) and controlled by a toothing of the key bit (22), and additional tumblers (26, 32) which are located axially between successive pin tumblers (19, 21) and which are controlled by side-face regions (38, 34) of varied level of the profiled flat key (17) and interact with recesses (36a, 36b, 33) in the inner circumferential face (12a) of the cylinder-core bore (12), specifically in that the lock-cylinder core (14) is equipped with supplementary blocking-pin bores (31) for receiving springless supplementary blocking pins (32) which serve as additional tumblers and which at their respective end near the key are controlled by a side-face region (34), controlling the supplementary blocking pins and of varied level, of the profiled flat key (17), at their respective end remote from the key channel interact in a cam-like manner with a respective blocking-pin recess (33) in the inner circumferential face (12a) of the cylinder-core bore (12) and, with a suitable flat key (17), can be disengaged from the respective supplementary blocking-pin recess (33) as a result of the rotation of the lock-cylinder core (14), and furthermore

    a) the lock-cylinder core (14) being equipped on at least one, preferably on both sides of the key channel (16) with axially spaced slots (24) arranged essentially perpendicularly to the cylinder-core axis,

    b) these slots (24) being designed for receiving double-armed blocking levers (26) which are mounted pivotably about a blocking-lever pivot axis (25) parallel to the cylinder-core axis, on both arms (27a, 27b) each have a blocking projection (26a, 26b) for engagement into a respective blocking-projection recess (36a, 36b) on the inner circumferential face (12a) of the cylinder-core bore (12), on one arm (27a) are connected for control purposes to a side-face region (38), controlling the blocking levers and of varied level, of the profiled flat key (17), are spring-loaded for the effect of maintaining this control connection and can be lifted with the two blocking projections (26a, 26b) out of the two blocking-projection recesses (36a, 36b), by the suitable flat key (17),

    c) the supplementary blocking-pin bores (31) lying with their bore axes approximately in the respective slot mid-plane and intersecting the respective slot side faces in the manner of a cylinder segment,

    d) and at least some of those supplementary blocking-pin bores (31) coinciding with slots (24) and not occupied by double-armed blocking levers (26) being occupied by springless supplementary blocking pins,

    e) and the profiled flat key possessing at different distances from the key spine (50), on at least one side face, a side-face region (38) of varied level and controlling the blocking levers and a side-face region (34) of varied level and controlling the supplementary blocking pins, corresponding to the occupation of the lock cylinder by double-armed blocking levers (26) and springless supplementary blocking pins (32), characterised in that the slots (24), the supplementary blocking-pin bores (31) intersecting the side walls of the slots (24) in the manner of a cylinder segment and opening into the key channel (16) and control-pin bores (29) connecting the slot bottom (24a) to the key channel (16) are so milled or drilled in the lock-cylinder core (14) that the mouths of the supplementary blocking-pin bores (31) and of the control-pin bores (29) lie respectively in axis-parallel mouth rows at different distances from the outer circumference of the lock-cylinder core (14), in that at least some of the slots (24) are occupied by a respective double-armed blocking lever (26) and the associated control-pin bores (29) respectively by a control pin (28), in that at least some of the supplementary blocking-pin bores (31) coinciding with unoccupied slots (24) are occupied by supplementary blocking pins (32), in that there is provided a key blank which is of a profile matched to that of the key channel (16) and which, at distances from the key spine (50) corresponding to the distances between the mouth rows and the outer circumference of the lock-cylinder core (14), possesses a respective sufficiently raised profile region for the formation of the side-face region (38) controlling the blocking levers and of varied level and for forming the side-face region (34) controlling the supplementary blocking pins and of varied level, and in that the level variation is made by drilling or milling in the individual profile regions according to the occupation of the lock-cylinder core (14) by control pins (29) and by supplementary blocking pins (32).

Images