DE8710037U1 - Locking device with corresponding keys - 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

Patent Attorneys Dipl.-Ing. H. Weic kman.n,-DiPLvJ ³ Hy/ bk..fc.:FiNCKE

Dipl.-Ing. R A.Weickmann, Dipl.-Chem. B. Huber Dr.-Ing. H. LiSKA, Dipl.-Phys. Dr. J. Prechtl

8000 MUNICH 86 7 May 1987

PO BOX 860 820

MDHLSTRASSE 22

PHONE (089) 980352

TELEX522621

TELEGRAM PATENTWEICK.MANN MÖNCHEN

CHE

Aug. Winkhaus GmbH & Co. KG August-Winkhaus-Strasse 4404 Telgte

Locking system

The invention relates to a locking system with at least two locking cylinders, 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 housing with a key channel for receiving an adapted key, spring-loaded pin tumblers with spring-loaded housing pins received in housing bores and associated core pins received in core bores and controlled by a toothing of the key breast, and supplementary 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, each locking cylinder being assigned an individual key and a plurality of lock cylinders to which a higher-level key is assigned.

- &zgr;

From the French publication 2 260 772 (utility model 74 27 050) a lock cylinder of the type mentioned at the beginning is known, in which the lock cylinder core is provided on both sides of the keyway with slots spaced apart in the axial direction and generally perpendicular to the cylinder core axis. These slots take up double-arm locking levers 3U ^F , Reichs &ugr;π; are pivotally mounted on a locking lever pivot axis parallel to the inner core axis, have a locking projection on each of the two arms for engaging in a locking projection recess on the inner peripheral surface of the cylinder bore, are in control connection on one arm 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 can be lifted out of both locking projection recesses by the adapted key with both locking projections.

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

The innovation is based on the task of specifying a locking system with locking cylinders that differ from the known locking cylinders in that they offer a greater range of options for varying locking cylinders of the same basic design and are more difficult for an unauthorized person to understand and more difficult to solve.

To solve this problem, it is intended that a locking cylinder of the type described above has the following features in combination:

^a ' The locking cylinder core is provided on at least one side, preferably on both sides of the key channel, with axially spaced slots located substantially perpendicular to the cylinder core axis;

b) part of these slots accommodate double-arm locking levers, which are pivotally mounted about a locking lever pivot axis parallel to the cylinder core axis, have a locking projection on each of the arms for engaging in a locking projection recess on the inner peripheral surface of the cylinder core bore, are connected on one arm to a locking lever-controlling, 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 locking cylinder core is provided with additional locking pin bores, the bore axes of which lie approximately in a slot centre plane and which intersect the respective slot side surfaces in the shape of cylinder segments ;

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d) At least some of the additional locking pin holes which coincide with slots not occupied by double locking pins are occupied by springless additional locking pins, which are controlled with their end closest to the key by an additional locking pin-controlling, level-varied side surface area of the key, interact with their end remote from the key channel in a cam-like manner with an additional locking pin recess in the circumferential surface of the cylinder housing bore and

*· adapted key by turning the Schi isQzy 1 irider

kerns aua the respective additional locking device &igr; ft recess can be disengaged»

According to an embodiment of the innovation, which is characterized by the highest safety value, it is provided that the two locking lever projections are only simultaneously disengaged from the respective locking projection recess in a single ""swivel angle position of the double-arm locking lever, i.e. both are simultaneously approximately flush with the inner circumferential surface of the cylinder bore.

&bull; . This embodiment is therefore of

particularly high security value because it is not possible or only extremely difficult to use a needle or a similar auxiliary instrument to bring all locking levers simultaneously into their only one angular position in which the rotation of the cylinder core is permitted.

The control connection between the double-arm locking lever and the locking lever controlling, level-varied side surfaces

The key area can be manufactured using a control pin, which is received in a first hole connecting the slot base with the key channel. This embodiment offers

This has the advantage, among other things , 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 any excessive weakening of the cylinder core. In addition, the design with control pins opens up the possibility of using locking levers that are identical to one another and of managing the variations in adaptation to different release levels of the leveled side surface area of the key by means of correspondingly different control pin lengths with a view to the smallest possible number of different components of the locking cylinder.

In the design with control pins, it is recommended that the control pin bore is larger in diameter than the slot width and that it cuts the two slot side surfaces in the manner of a cylinder segment. In this way, an extended guide for the control pin can be achieved in order to avoid undesirable tilting, and in addition, the control pin bores can be drilled with a larger diameter in order to simplify production.

For the spring loading of the double-arm locking lever, it is proposed that a double-arm locking lever be loaded by a helical compression spring, which is accommodated in a spring bore that cuts into the slot side surfaces of the respective slot and/or the slot base. This design is desirable with regard to easy assembly of the locking cylinder.

It would be conceivable in principle to use the g:;jr _r . _en level-varied side surface areas of the key to control the locking levers and the additional locking pins. With regard to the extension of the variation

·

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However, in order to take into account the different locking behavior possibilities of different locking cylinders, it is advantageous if the locking lever-controlling, level-varied side areas of the key and the level-varied side areas of the key that control the locking pin are at different distances from the key back. It is recommended that the level-varied side area of the key that control the locking lever are closer to the key back than the level-varied side area of the key that control the additional locking pin.

C key. This design ensures

an extended guide for the additional locking pins in the associated additional locking pin holes, 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 cylinders, 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 several double locking levers.

'- It was already indicated above that equality of

Double arm locking levers among each other or at least equality within several groups of double arm locking levers is desired. Different levels of the release levels of the locking lever-controlling, level-varied side surface area belonging to the individual double arm locking levers can then be compensated by different control lengths. A solution that is particularly advantageous in terms of manufacturing simplification and manufacturing costs is achieved when the locking lever-controlling, level-varied side surface area of the key release lever is only

&bull; · a ■ &igr; ·

2v;ei have different levels and therefore only two control pin types of different lengths are provided.

In order to ensure that the additional locking pins and, if applicable, the control pins cannot fall too far or completely into the keyway and thus lose their guidance in the holes that accommodate 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 holes have a diameter gradation with a smaller diameter hole section close to the keyway and a larger diameter hole section further away from the keyway.

The locking cylinders
for the locking systems according to the invention can in principle be made with a wide variety of key profiles. However, it is recommended to use the keys as I

Flat keys are to be made, 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 pocket or on a key ring together with several other keys and therefore wants keys that are as bulky as possible.

In order to achieve the greatest possible variation in the locking behavior of locks of the same basic design, the flat keys can be designed as flat keys with a profiled cross-section, which have the corresponding complementary counter-profile of the key channels.

In order to ensure the most efficient production of the locking cylinders, it is recommended that the slots

: using a circularly curved disc milling cutter

: milled slot base. This design

j is in any case then without further ado &tgr;&igr; ö g 1 i c h , if the

j Control connection of the double arm locking lever1 with the

j sel side surfaces are manufactured via control pins.

In order to simplify the manufacture of the locking projection recesses and the additional locking pin recesses

jj it is further proposed that the locking projection

f . recesses and the additional locking pin recesses in a

Sleeve, which i-'i a housing bore

\ of the sliding cylinder is inserted.

j It is recommended to insert the sleeve into the housing bore

to press in to fix the recesses non-rotatably.

j lay.

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

f To protect the sleeve against external access and to

In order to maintain the 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 exploits 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 lever-controlling side surface area. A corresponding flat key blank is characterized in that

-S-

because it has a sufficiently raised profile area at different distances from the key back for the formation of the locking lever-controlling, ηiueauvaried side surface area and for the formation of the additional locking pin-controlling, ηiueauvaried side surface area. In the raised profile areas, only lugs or millings need to be introduced to level the profile. These drillings and millings can be carried out in the manufacturer's factory and also by the authorized
Locksmith with the usual work processes and
Manufacture machines without opening the door to unauthorized key copying.

The locking cylinders according to the invention are well suited for
Suitable for both entry and exit to the ski slopes.

In case of a locking cylinder for single locking
It is intended that the respective locking cylinder in question differs from other locking cylinders of the same basic design by different slot configurations.
Double arm locking levers and additional locking pins :ind/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 by different pin tumblers with correspondingly different key breast designs and/or by very different profile designs
of the key channel and accordingly of the key
It is readily apparent that the basic structure of the locking cylinder according to the invention offers a much greater range of variations than previous locking cylinders, whereby the optional use of double-node locking levers and locking pins makes this
The possibility of variation can be increased without

il iff,- &Ggr;'.&igr;in',&igr; i Ii &igr;&Ggr;&Tgr;&Tgr;

a Hit <« an »· &diams; ·* ·

- 10 -

one has to resort to an overly fine gradation of the key profiles and/or an overly fine gradation of additional plates in the pin tumblers cnuO .

Pei construction of a locking system with a plurality of lock cylinders of the type according to the invention, a locking system in which each individual lock cylinder is assigned an individual key and a plurality of lock cylinders - in which a higher-level key is assigned to it, if necessary

assigned different values, can be

the individual closing words are separated within the plural by |

&iacgr; different plate arrangement in the pin holder

and/or by different profiles 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 series can be distinguished from one another by differently occupying the slots with double-arm locking levers. It is even possible to use locking levers that can be released at different levels if the locking projections

the locking lever in a U-angle range of finite l-angle value are simultaneously out of engagement with the locking projection recess of that part; the locking lever-controlling side surface areas of the individual keys are then designed with release levels with at least two different levels, namely a higher level and a lower level, and a higher-level key is designed with release levels of medium level. In this case, higher-level keys of different values (master key, general master key) can be provided in any way, which can then be directed in the direction

iuhehmehder value to an ever greater extent have tax exemptions 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 allow the locking cylinder core to rotate over a larger pivoting range, so that higher-level keys are also possible, can be found in the French publication 2 280 772 (utility model

^. 74 27 050) and should be independent of the

Combination of the double arm locking lever principle with the additional locking pin principle protected.

A preferred form of a locking system with a group of locking cylinders is designed in such a way that at least some of the locking cylinders within the group differ from one another by different positions of the double-arm locking levers that can be released at the same level, that the individual keys each have release levels of the same height where there are locking levers that can be released at the same level in the corresponding locking cylinder and that a higher-level key has release levels.

C levels of the same level for. all equal levels

releasable locking levers of several or all locking cylinders in the group. In this embodiment, locking levers can be used which only have both locking projections out of engagement with the locking projection recesses in a single pivoting position, which is of considerable importance with regard to the safety of the locking cylinders.

Double-arm locking levers that can be released at the same level are particularly suitable for those that are designed in terms of shape and size

are equal and, if necessary, with equally long
control pins work together.

It can also be assumed that in any case the locking projection recess and the locking pin recess in the peripheral surface of the cylinder core bore can also be easily manufactured as connected grooves.

It should also be mentioned that the invention also

&zgr; appropriate locking cylinder construction as for the Kon

struction according to DE-PS 20 03 059, it is possible to position the side surface areas of the key controlling the additional locking pin in such a way that the key strength does not allow the lowest control points to be replaced by a continuous groove, by
Key then either breaks into two parts or
would be unduly weakened.

The accompanying figures illustrate the invention using exemplary embodiments. They show:

Fig. 1 is a side view of the cylinder core of a C_ locking cylinder;

Figure la shows a section along line Ia/Ia of Figure 1 through a locking cylinder with adapted

Key according to figure le;

Figure Ib shows a section along line Ib/Ib with an adapted key according to Figure le;

Fiour lc a cut along line Ia/Ia with false
Key according to figure If;

. Ir

- 13 -

Fiauf ld a section along line Ib/Ib with false key according to figure If;

Figure 2a shows a further embodiment in a section according to the line Ia/Ia with an adapted key according to Figure 2g;

Figure 2b shows a section according to line Ib/Ib of the locking cylinder according to Figure 2a with an adapted key according to Figure 2g;

Figure 2c shows a section along line Ia/Ia of a locking cylinder according to Figures 2a and 2b with a false key according to Figure 2h;

Figure 2d shows a section according to line Ib/Ib of a locking cylinder according to Figures 2a and 2b with a false key according to Figure 2h;

Figure 2e shows a section according to line Ia/Ia in a locking cylinder according to Figures la and Ib with a superior key according to Figure 2i;

Figure 2f is a section along line Ib/Ib of a locking cylinder according to Figures 2a and 2b with the master key according to Fig. 2i.

Figures 3a and 5b are schematic representations of two locking cylinders forming a locking system;

Figure 3c shows a master key to the locking cylinders according to Figures 3a and 3b;

Figure 4a a cross section through the locking cylinder

according to Figure 3a in position G;

Figure 4b is a section through the locking cylinder 1 according to Figure 3b in position H;

Figure 3a is a side view of the flat key according to Figure 3a;

Figure 5b is a side view of the flat key according to Figure 3b;

Figure 3c is a side view of the flat key according to Figure 3c;

Fig. 6 shows a modification of the embodiment according to Figs. 1 and 1a;

Fig. 7 "a view of the embodiment according to Figure 6, partly in section.

In Figures 1, 1a and 1b, the housing of a locking cylinder is designated 10 and is designed with a HAHN profile. The locking cylinder housing 10 has a cylinder core bore 12 which accommodates a locking cylinder core 14. The inner circumferential surface of the cylinder core bore is designated 12a. The locking cylinder core 14 has a key channel 16 in which an adapted flat key 17 is accommodated. The locking cylinder housing 10 has housing bores 18 which accommodate housing pins 19. Core bores 20 are provided in the locking cylinder core 14 which are intended to accommodate core pins 21. The key 17 has a serrated keyway 11 which is designed to separate the separating surfaces between the outer housing pins 19 and the core pins 21 in the inner peripheral surface 12a of the cylinder core.

hole 12 so that the locking cylinder core can be rotated. Plates 23 can be arranged between the housing pins 19 and the core pins 21 in order to enable a rotary movement of the cylinder core 14 with different tooth levels of the key breast 22, especially in locking systems.

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

The slots 24 are penetrated by bearing pins 25 which are parallel to the cylinder core axis and are accommodated in corresponding bores 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 peripheral surface 12a in a single angular position shown in Figures 1a and 1b and thus release the locking cylinder core for rotation. A control pin 28 rests on the arm 27a and is slidably mounted in a control pin bore 29 in the locking cylinder core 14. This control pin 28 engages with its inner end in a key recess 30 of the adapted flat key 17. The depth of the hole 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 are flush with the inner circumferential surface 12a of the cylinder core bore 12 and the cylinder core 14 can be rotated.

ti *4t*

&Idigr; There are several on each side of the key channel 16

Slots 24 are provided, each centered between

\ &zgr;two pin connections following each other in the axial direction

\ attitudes 19, 21.

The slots 24 are widened by stepped additional locking pin bores 31, each consisting of a larger diameter bore section 31a and a smaller diameter bore section 31b. Additional locking pins 32 are accommodated in the additional locking pin bores 31, each consisting of a larger diameter locking pin section 32a and a smaller diameter locking pin section 32b. The additional locking pin bores 31 pass through the respective slotted edge "24a. The additional locking pins 32 rest with rounded inner ends on the flat key 17 and are designed with outer rounded ends for engagement in locking pin recesses 33 on the inner peripheral surface 12a of the cylinder core bore 12. On the side surfaces of the flat key 17, level-varied additional locking pin controlling side surface areas 34 are provided at the height of the additional locking pins 32, for example by drilling.

s , which interact with the additional locking pins 32.

The level-varied, additional locking pin controlling side surface areas 34 of the key 17 have drilled and undrilled control points as the release level. The lengths of all additional locking pins can be the same if the drill holes in the key are the same depth and the additional locking pin recesses 33 are also the same depth.

In Figure 1a, the additional locking pin 32 engages in the additional locking pin recess 33. What is not shown is that the associated level-varied side surface area 34 of the key 17 for the engagement of the inner end of the additional locking pin 32 has a clearance hole as the release level.

which is just sufficient to remove the radially outer end of the additional locking pin 32 from the additional locking pin recess 33 when it is pushed inwards. When the locking cylinder core 14 is rotated by the key 17, the additional locking pin 32 is pushed into the recess of the flat key 17 by the cam-like interaction of its outer end with the additional locking pin recess 33. The back of the key is designated 50.

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

The locking lever 26 is loaded in the counterclockwise direction by a helical compression spring 35, in such a way that, with a suitable flat key 17, the locking projections 26a and 26b are 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 Figure 1a, the locking projections 26a and 26b are in the locking projection recesses 36a.

and 36b in the inner peripheral surface 12a of the cylinder core bore 12.

The helical compression spring 35 is accommodated 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 leveling side surface areas of the key which interact with the control pins 28 are marked 38. The bores 30 are included in these side surface areas.

t ti (iiinij

· · · Ji

it · · I

- ^&igr;&bgr; - &igr;

Figure 1e shows a section through the adapted flat key 17 at the height of the leveled side surface areas 38 with the bore 30.

In Figure 1b, a further locking lever 26 of the same shape is shown. This locking lever 26 is located at a point where the level-variable locking lever-controlling side surface area 38 has no bore. Accordingly, a shorter control pin 28' is inserted at this point, so that the locking lever 26 with its

r- locking projections 26a and 26b are 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 disengaged from the locking projection recesses 36a and 36b, respectively. The locking projection recesses 36a, 36b are machined as longitudinal grooves into the inner circumferential surface 12a.

If an incorrect key 17' is inserted as shown in Figure If, the positions shown in Figures Ic and Id for the two locking levers 26 occur, so that

f according to Figure Ic of the locking projection 26a into the locking projection

recess 36a engages and according to Figure Id the locking projection 26b engages in the locking projection recess 36b. The locking cylinder core 14 is then locked against rotation.

In the example case, only two control pins 28' are provided. If several slots 24 are occupied by locking levers 26 and the drillings 30 are all 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.

(«4 to lit·

- 19 -

The additional locking pins 3 2 also have a locking effect if an incorrect key 17* has no drilling or a drilling that is too shallow at the location of the respective additional locking pin.

Figures 2a and 2b show a modified embodiment. It can be seen that the locking levers 126 are dimensioned in such a way that, in a limited pivoting range, their locking projections 126a and 126b do not fit into the locking projection recesses 136a and 136b.

f intervene. Figures 2a and 2b show the locking 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 by locking levers 126 and that these locking levers are again assigned long and short control pins 128 and 128' respectively. In Figures 2a and 2b the locking projections 126a and 126b are approximately the same distance from the inner peripheral surface 112a.

Figures 2c and 2d show the angular position of the locking lever 126 when an incorrect key 117' is inserted as shown in Figure 2h. The locking cylinder core 116 cannot then be turned.

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

- 20 -

ih 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 shown in Figure 2i is a higher-level
Master key and allows all locking levers 126 to be brought into release positions. This higher-level master key has equally deep bores 130'' in the locking lever-controlling, level-varied side surface areas 138, and 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 Figures 2a and 2f is intended in particular for locking systems. In shooting systems, the locking cylinders within the locking system can differ from one another, among other things, by the different configuration of the slots 124 with locking levers 126 and/or additional locking pins 132. Furthermore, a distinction can be made by varying the profile of the flat key 117. Furthermore, a distinction can be made by different plates according to Figure la position 23, as is usual.

Of course, in those slots in which
in which locking levers are present, no additional locking pins are 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 in each slot there can be an additional locking pin in addition to a locking lever.

In the key representations according to Figures le, If and 2g to 2i, the non-drilled control points or release levels 51 are each indicated by a thicker line. However, these control points differ

ti ·

- 21 -

not from the rest of the profile.

Figures 3a and 3b show a schematic representation of a preferred embodiment of a locking system based on an example. Analogous parts are provided with the same reference numerals as in Figure la, 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 mean the assignment to

f two different locking cylinders I and II in the B -

L example only from two locks 1 in the existing

' locking system means.

&iacgr; According to Figure 3a and 4a, a locking cylinder has a

' single locking lever 226 Gl in position G. The other

!, Locking cylinder according to Figure 3b has according to Figure 3b

and 4b a single locking lever 226HII. The locking levers 226G and 226HII are of the same size and are located on the respective flat control pins 228 GI and 228 HII of the same length.

t key 2171 or 217II, namely the first mentioned

f. at the release level 230GI and the second mentioned at Ü3m release

i level 230HII. It can be seen that the locking projections 226aGI

j f and 226aHII are flush with the inner peripheral surface 212al

ji or 212aII. In both SchlieGzy 1 there is therefore the

I correct key so that the respective cylinder core

i is rotatable.

: l-5an recognizes without further ado that the key 217II is not for

■ '. the locking cylinder according to Figure 3a and vice versa

the key 2171 does not fit the locking cylinder ·- < according to Figure 3b. In contrast, Figure 3c shows a superior key 217I+II with two release levels, namely 230GI+II and 230HI+II. The key 217I+II according to Figure

I 3c is therefore a superior key that is used for both

the locking cylinder according to Figure 3a as well as for the locking cylinder according to Figure 3b.

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 an additional 232GII can be arranged in position G. In Figures 5a and 5b one can see the side views of the keys belonging to Figures 3a and 3b respectively. The key according to Figure 5a combines 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-varied side surface area 234. Accordingly, the flat key according to Figure 5b shows a locking lever-controlling release level 230GI. in the level-varied, locking lever-controlling side surface area 238 and an additional locking pin-controlling release level 250GII in the additional locking pin-controlling, level-varied side surface area 234. Accordingly, the higher-level key according to Figure 5c further shows locking lever-controlling release levels 230GI+II and 23OHI+II in the locking lever-controlling, level-varied side surface area 238 and additional locking pin-controlling release levels 250GI+II and 25OHI+II in the additional locking pin-controlling, level-varied side surface area 234.

It can also be seen from Figures 5a to 5c that the keys 2171, 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 now of course possible to arrange the locking levers in other positions A to H. In this case, locking levers can of course be arranged in several positions A to H in each individual locking cylinder of the locking system.

it § III * II t

&iacgr;&iacgr; .' V

and corresponding release levels on the associated * keys in the respective positions. Where no locking levers are provided, additional locking pins can be fitted.

As can be seen from Figures Aa and ab , the locking levers 226GI and 226HII are identical in shape and dimensions, in such a way that they can be disengaged from both associated locking devices in a single angular position.

f recesses 236aGI, 236bGI are bzn. 236aHII and

236bHII. It is necessary in this embodiment that the release levels 23OGI and 23DHII and all other locking lever release levels have the same height so that a higher-level key 217I+II is possible. This means that the control pins 228GI and 228HII are also the same length in the entire firing system.

It is possible to provide locking levers in the individual locking cylinders that can be released at different levels, for example | in the same positions. However, it is important that in those positions whose locking levers are used to distinguish the locking cylinders from one another within the locking system | ( , the same release levels 23OGI and 230HII } are used.

etc. to allow a parent key |

It is easy to see that a considerable number of possible variations are created by varying the position of the locking lever and the additional locking pins in positions A to H. The additional locking pins 232HI (Figure 3a), 232GII (Figure 3b), 232CI (Figure 4a) and 232DII (Figure 4b) are also designed to be released at the same level, so that a higher-level key is also possible in this respect.

It should be noted at this point that even in places where no locking levers and no additional locking pins are provided, the slots required to accommodate the locking levers and the additional locking pin holes required to accommodate the additional locking pins can be present. This means that the cylinder cores for all locking cylinders can be designed in the same way and that individual locking cylinders can only be distinguished from one another by the different arrangement of the slots with locking levers and by different

The additional locking pin holes are equipped with additional locking pins. This is important for factory production, without making the locking cylinders easier for unauthorized persons to access.

In the example, the release levels 230Gl, 23OHII, 250HI, 2 5OG11 etc. are each formed by holes, whereby the depth of the holes 230 GI and 2 3OHI I is the same and the depth of the holes 250HI and 2 5 0 GI I is also the same. It is of course also possible to create the release levels by milling in the corresponding ribs.

If the locking cylinder variation is not sufficient due to the locking levers and the additional locking pins, for example in very large locking systems, it is of course also possible to use other distinguishing features to distinguish the locking cylinders within a locking system. For example, the profiles 251 of the keys according to Figures 5a and 5b can be made different, in which case a higher-level key according to Figure 5c can be used.

j Key test11 must be used, which is available in both the

Key channel of the locking cylinder according to Figure 4a as well as

&bull; tat i Ii &igr;* ItIIIiI

I aiii Il I ₍ i ₍

i'i Ulli &kgr; Ii ·

-Ib-

ir. the key channel of the locking cylinder according to Figure 4b. It is also possible to differentiate between the locking cylinders of a locking system by means of different plate heights and plate numbers at position 2231 (Figure 4a) or 223II in the locking cylinder according to Figure 4b. In this case, a superior key must be designed in its serrations in such a way that it brings the locking pin pairs into a release position for several or all of the locking cylinders of the locking system.

In principle, it is also possible to use only the key profile 251 and/or the plates 2231 or 22311 to distinguish between the locking cylinders within the locking system and to use the locking levers and the additional locking pins to distinguish between different locking systems. In this latter case, there is of course no longer a requirement that all locking levers can be released at the same level.

Figure 6 shows an embodiment in which the locking projection recesses 336a and 336b as well as the additional pin recesses 333 are arranged in a sleeve 353

are formed. This sleeve 353 can be made of stainless ^steel and inserted, in particular pressed, into a cylinder core bore 312. In this way, the manufacture 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 this significantly reduces the risk of wear on 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 normally soft material of the locking cylinder housing.

M (&igr;, &igr; ti (l«l ti · · · ·

· &igr;'JJ; · j J ;

It should be noted at this point that for manufacturing reasons the cylinder housings are preferably made of a non-ferrous metal, particularly brass, which is much more susceptible to wear than stainless steel. The locking projection recesses and the additional locking pin recesses can be formed continuously in the sleeve j 5"?i , which further simplifies manufacture.

Figure 6 also shows, in contrast to the other cross-sectional figures, that the locking projection recesses

336a and 336b are rounded on their edges 354a, 354b, 354c and 354d. This is of essential importance when the additional locking pins 332 are in the same plane as the locking lever 326, so that when the locking cylinder core is turned using the inserted key, the additional locking pins 332 can slide over the edges 354a to 354d without the risk of getting caught.

Figure 7 shows that the sleeve 353 is covered by the cover plate 355 of the lock cylinder core 314, so that the sleeve 353 is inaccessible and the appearance of the

Locking cylinder from the front side does not differ from conventional locking cylinders·

For the term HAKN profile, please refer to Figure 6. The HAHN profile of the locking cylinder 310 shown in Figure 6 is referred to in German technical terms as the "HAHN profile".

It has already been mentioned above that the slots and the additional locking pin holes in the locking cylinder core can be present in all positions, even where there is no locking

- 27 -

lever and no additional locking pins are installed on each locking cylinder. This also applies to the locking projection locks and the additional locking pin recesses .

Fig. 6 also shows the following!

The control pin 328 consists of an outer section 328a of larger diameter and an inner section 328b of smaller diameter. Accordingly, the control pin bore 329 consists of an outer section 329a of larger diameter and an inner section 329b of smaller diameter. This also ensures that the control pin 328 cannot fall into the locking 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 against contact surfaces 356 of the lock cylinder housing 310, so that the sleeve 353 is fixed in the lock cylinder housing so that it cannot rotate.

Claims (1)

Patent attorneys Dipl.-Ing. H. WHic?KMANN ₄ .tUßr..-PH,YS.:DR. K. Fincke Dipl.-Ing. F. A.¥eickmann, Dipl.-Chem. B. Huber Dr.-Ing. H. Liska, Dipl.-Phys. Dr. J. Prechtel 8000 MONKS 86 &psgr; .. . ,&ldquor;_, PO BOX 860820 *'"^''&trade; ( MOHLSTRASSE 22 PHONE (089) 980352 TELEX522621 TELEGRAM PATENTWEICKMANN MUNICH CHE Aug. Winkhaus GmbH & Co. KG August-Winkhaus-Strasse
4404 Telgte Locking system Protection claims 1. Locking system with at least two locking cylinders, each locking cylinder comprising a locking cylinder housing (10), in particular a locking cylinder housing with a HAHN profile, a locking cylinder core (14) rotatably mounted in a cylinder core bore (12) of the locking cylinder housing (10) with a key channel (16) for receiving an adapted 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 face (22) and axially between successive pin tumblers (19, 21) located supplementary tumblers (26, 32), which are controlled by level-varied side surface areas (38, 34 of the key (17) and interact with recesses (36a, 36b, 33) in the inner circumferential surface (12; of the cylinder core bore (12), characterized by the combination of the features a) the locking cylinder core (14) is provided on at least one, preferably on both sides of the keyway (16) with axially spaced apart, essentially perpendicular to the ^ Provided with slots (24) aligned with the cylinder core axis; b) a part of these slots (24) accommodates double-arm locking levers (26) which pivot about a locking lever pivot axis (25) parallel to the cylinder core axis
are pivotally mounted on both arms (27a,
27b) each have a locking projection (26a, 26b) for
Engaging in a locking projection recess (36a 36b) on the inner peripheral surface (12a) of the cylinder core bore (12), on an arm (27a) in control connection with a locking lever controlling
level-varied side surface area (38) dt*s r ' key (17), spring-loaded in the sense of Maintaining this control connection _{is done by} the adapted key (17) with both
locking projections (26a, 26b) can be lifted out of both locking projection recesses (36a, 36b); c) the locking cylinder core (U) _{is provided with} additional locking pin bores (31) which are...
Bore axes approximately in a Sc ₁ ]IIt ₂ . center plane and the _respective grinding
Cut the side surfaces in the shape of a cylinder segment; d) at least some of the additional locking pin holes (31) which coincide with slots (24) not occupied by the double arm locking lever (26) are occupied by springless additional locking pins (32), which are controlled with their end closest to the key by a level-variable side surface area (34) of the key (17) which controls the additional locking pin, interact with their end remote from the key channel in a cam-like manner with a locking pin recess (33) in the peripheral surface (12a) of the cylinder core bore (12) and can be disengaged from the respective additional locking pin recess (33) by turning the locking cylinder core (14) when the key (17) is adapted. I e) Each locking cylinder has its individual key and a plurality of locking cylinders A higher-level key is assigned to the locking system. 2. Locking system according to claim 1, characterized in that the two locking lever projections (26a, 26b) are each simultaneously out of engagement with the respective locking projection recess | (36a, 36b) only in a single pivot angle position of the double-arm locking lever (26), that is, both are simultaneously approximately flush with the inner circumferential surface (12a) of the cylinder core bore (12). 3. Locking system according to claim 1 or 2, characterized in that the control connection between a double-arm locking lever (26) and the locking lever-controlling, level-varied side surface areas (38) is established by means of a control pin (28) which is received by a control pin bore (29) connecting the respective slot base (24a) to the key channel (16). » 4 4 4 4 4 »4 I 4 4 4 4 4 4 4 4 ·4 4. 4 4 4*44 4« of the key (17) at different distances from the back of the key* 4. Locking system according to claim 3, ^{characterized in that the} control pin bore (29) is larger in diameter than the slot width and cuts the two slot side surfaces in the manner of a cylindrical segment. Locking system according to one of claims 1 to 4 _f , characterized in that a double-arm locking lever (26) is acted upon by a helical compression spring (35) which is received in a spring bore (37) intersecting the slot side surfaces of the respective slot (24) and/or the slot base (24a). 6· Locking system according to one of claims 1 to 5 _S , characterized in that the locking lever-controlling, level-varied side surface areas (38) of the key (17) and the level-varied, additional locking pin-controlling side surface areas (34) ⁷ · Locking system according to claim 6, characterized in that the locking lever-controlling, level-varied side surface areas (38) of the key (17) are closer to the key back (50) than the additional locking pin-controlling, level-varied side surface areas (34) of the key (17), ^ ^{1 8} - Locking system according to one of claims 1 to 7, I characterized in that several, preferably all slots (24) on at least one side of the key channel (16) are each penetrated by a bearing pin (25) common to several double-arm locking levers (26). 9. Locking system according to one of claims 3 to 7, characterized in that all the locking levers (.26) are designed identically to one another. ^* Locking system according to claim 9, characterized in that different levels of the release levels (30, 51) of the level-varied side surface area (38) controlling the locking levers (36) associated with the individual double-arm locking levers are compensated for by different control pin lengths (28, 28'). 11. Locking system according to claim 10, characterized in that the level-varied side surface areas (38) of the key (17) controlling the locking lever have release levels (30, 51) with only two different levels and that accordingly only two control pin types (28, 28') of different lengths are provided. 12. Locking system according to one of claims 1 to 11, characterized in that the additional locking pins (32) and accordingly the additional locking pin bores (31) and/or the control pins (28, 28') and accordingly the control pin bores (29) have a diameter gradation with a smaller diameter bore section close to the key channel (31b) and a larger diameter bore section further away from the key channel (31a). ft * « 13. Locking system according to one of claims 1 to 12, characterized in that the key (17) is a flat key* 14· Locking system according to claim 13, characterized in that the flat key (17) is a profiled flat key. 15' Locking system according to one of claims 1 to 14, characterized in that the slots (24) are milled by means of a disk milling cutter with a circularly curved slot base (24a). ^lß · Locking system ^according to one of claims 1 to 15, characterized in that the locking projection recesses (336a, 336b) and the additional locking pin recesses (333) are formed in a sleeve (353) which is inserted, in particular pressed, into a housing bore (312) of the locking cylinder (310). 17. Locking system according to claim 16, characterized in that the sleeve (353) is slotted and is fixed non-rotatably by the slot edges to stop surfaces (356) of the lock cylinder housing (310), &zgr; wherein the stop surfaces (356) are preferably symmetrical. [ tric with respect to the longitudinal center plane of the X cylinder housing (310). l ⁸ · Locking system according to one of claims 16 and 17, ' characterized in that the locking projection recesses (336a, 336b) and/or the additional locking pin recesses (333) completely penetrate the sleeve (353) in the radial direction. ' 19- Locking system according to one of claims 16 to 18, *' · characterized in that the sleeve (353) is Front end is covered by a cover plate (355) of the locking cylinder core (314). 20.. Locking system according to one of claims 1 to 19, characterized in that individual locking cylinders of the plurality differ from one another by:- | different plate arrangement (23) in the pin tumblers (19, 21) and/or by different key profiling and/or by different additional locking pin arrangements. 21. Locking system according to claim 20, characterized in that individual locking cylinders of the plurality differ from one another by the different occupation of the slots (124) with double-arm locking levers (126), whereby the locking projections (126a, 126b) of the locking levers (126) are simultaneously out of engagement with the respective locking projection recess (136a, 136b) in an angular range of a finite angular value, the locking lever-controlling side surface areas (138) of the individual keys (117) have release levels (130, 151) with at least two different levels, namely a higher level and a lower level, and whereby a higher-level key (117'') has control points (130') with a medium level. 22. Locking system, in particular according to one of claims 1 to 21, with a plurality of locking cylinders, each locking cylinder comprising a locking cylinder housing (110), in particular a locking cylinder housing with HAHN profile, a locking cylinder core (114) rotatably mounted in a cylinder core bore (112a) of the locking cylinder (110) with a key channel (116) for receiving an adapted individual key (117) and tumblers (126) which are controlled by level-varied side surface areas (138) of the key (117) and interact with recesses (136a, 136b) in the inner circumferential surface (112a) of the housing bore (112), characterized by the combination of the features a) the locking cylinder core (114) is provided on at least one, preferably on both sides of the key channel (116) with slots (124) which are spaced apart in the axial direction and are located substantially perpendicular to the cylinder core axis; b) at least a portion of these slots (124) takes Double arm locking lever (126) | , which are pivotably mounted about a locking lever pivot axis ( 125) parallel to the cylinder core axis, have a locking projection (126a, 126b) on each of the two arms for engaging in a locking projection recess (136a, 136b) on the inner peripheral surface (112a) of the housing bore (112), are in control connection on one arm with a locking lever-controlling, level-varied side surface area (138) of the key (117), are spring-loaded in the sense of maintaining this control connection and can be lifted out of both locking projection recesses (136a, 136b) by the adapted individual key (117) with both locking projections (126a, 126b); c) the locking lever-controlling, level-varied side surface areas (138) of the adapted individual keys (117) have release levels (130, 151) with at least four different levels, namely a higher level (151) and a lower level (130); d) the locking levers (126) have a tilting angle range of a finite angle value, within which they are disengaged from the locking projection recesses (136a 136b) with both locking projections (126a, 126b); e) a higher-level key (117'') has release levels ( ^13O11 ) with an intermediate level height. 23. Locking system according to one of claims 2 to 8 and 12 to 19, characterized in that at least some of the locking cylinders within the group differ from one another by different positions (A to H) of double-arm locking levers (226GI, 226HII) that can be released at the same level, that the individual keys (2171, 217II) each have release levels (230GI, 230HII) of the same level where locking levers (226GI, 226HI I) that can be released at the same level are located in the corresponding locking cylinder, and that a higher-level key (217I+II) has release levels (230GI+II, 230HI+II) of the same level for all locking levers (226GI, 226HII) that can be released at the same level of several or all locking cylinders in the group. 24. Locking system according to claim 23, characterized in that the locking levers (226GI, 226HI I) used to distinguish the locking cylinders within the group are identical in shape and size and, if necessary, interact with control pins (228GI, 228HII) of the same size.